CITY OF LONDON 2018 DRINKING WATER SUMMARY REPORT

Transcription

1 CITY OF LONDON 2018 DRINKING WATER SUMMARY REPORT System Name: City of London Distribution System Mailing Address: Corporation of the City of London P.O. Box 5035, 300 Dufferin Ave. London, ON N6A 4L9 System Rating: Water Distribution Subsystem Class IV Water Treatment Subsystem Class II Average Day Demand: MLD Peak Day Demand: MLD (June 17, 2018) Population Served: 385,000 (approx.) Source Water: Surface Water (Lake Huron, Lake Erie) Drinking Water System Number: Municipal Drinking Water Licence: CONTACT INFO: Owner: Corporation of the City of London 300 Dufferin Avenue, London, Ontario N6A 4L9 Contact: Mr. John Simon, P.Eng. Division Manager Water Operations ext. 4938

2 Table of Contents Reporting Requirements... 3 Water Budget... 3 table Initiatives... 3 Sampling & Water Quality Monitoring... 5 System Statistics and Major Events... 9 Municipalities Receiving London Water APPENDICES 2018 Annual Report Summary of Water Pumpage Annual Report (EMPS London) Compliance Summary Report Corporation of the City of London Page 2 of 44

3 Reporting Requirements Ontario Regulation 170/03 requires that municipalities prepare a Summary Report for their drinking-water system for the preceding calendar year and submit it to the members of the Municipal Council by March 31 of each year. This report, presented to Municipal Council s Civic Works Committee on February 20, 2019 fulfills that requirement. O. Reg 170/03 also requires the preparation of an Annual Report on the operation of the drinking-water system to be made available to members of the public. Before February 28, 2019, a copy of the 2018 Annual Report and Summary Report for the City of London s water works will be provided to the local office of the Ministry of the Environment, Conservation and Parks (MECP) as a courtesy for information purposes. The Elgin-Middlesex Pumping Station (EMPS) is jointly owned by the St. Thomas Secondary Water Supply System, the Aylmer Secondary Water Supply System, and the City of London. EMPS is operated by the Ontario Clean Water Agency (OCWA). As required, the Annual Report for the EMPS (London portion) is attached as an appendix to this report for members of Council. Water Budget The approved operating and capital budgets represent financial sustainability for Londoners, whereby annual rate increases are approximately the average of the Consumer Price Index (CPI) and the n-residential Building Construction Price Index (NRBCPI). The water operating and capital budgets support four core business objectives: Compliance Financial Management Customer Service Best Management Practices The total Water budget for 2018 was $78.0 million, which includes long term infrastructure improvements. The Water Budget helps maintain London s Advantage of a safe, clean and secure water supply. The Water Service Area remains proactive in initiatives to ensure that this service continues to meet the demands and expectations of customers. Existing infrastructure requires ongoing renewal (replacement and rehabilitation) activities to manage the infrastructure gap, ensuring that future generations are not faced with a water system that is failing, unreliable, and expensive to maintain. table Initiatives Bulk Water System Replacement The City of London has 8 bulk water filling station locations that allow commercial, 2018 Compliance Summary Report Corporation of the City of London Page 3 of 44

4 residential, and bulk water contractors to obtain bulk water. These 8 locations are the only authorized locations where bulk filling is allowed in the City, and are situated and designed to help minimize the risk and attempts of theft of water from fire hydrants. The previous system was over 12 years old, and antiquated given current technology. It required customers to go directly to City Hall to add value to their prepaid smart card so that they could then go to a bulk water station to obtain water. There was no reporting capabilities for customers, and consumption data had to be manually downloaded from each station, making it very basic and labour intensive. In 2017, the City of London issued and awarded an RFP for a new system. In spring of 2018 the new system was installed and has been very successful, and well received. Our customers can now add value to their account any time of day by logging in, and have numerous reporting abilities to enhance their business functionality, providing the who, when and where for water takings. City staff now have the ability to easily report water consumption at each station, who is taking water, when the water is taken, and how much, right from the office environment. More importantly, the ability to transmit messages to various stations for users to see (for example, in the event a station needs to be closed for maintenance), or alternatively, shut down a station remotely so that water taking can be temporarily halted at that location. However, the biggest benefit has been the ability to assist our customers in real time when they encounter difficulties. We can see what is going on at any given station 24/7 without needing to go onsite. This major customer service improvement has invaluable. Water Meter Replacement Program In 2008, assessment of London s long term water meter and meter reading strategy involved investigation and evaluation of alternatives ranging from the status quo to implementation of the highest state of the art system. Evaluation criteria included review of London Hydro s Smart Metering and meter upgrade requirements, the current relationship between London Hydro and the City, customer care and service, ease of implementation, capital cost, operating costs, meter readability, system reliability, system needs and benefits. Upon completion of the evaluation, the City opted for the Itron Encoder Receiver Transmitter (ERT) based radio read system as it best met our needs for meter reading, customer service, capital cost, minimized operating cost, and utilized existing encoder meter infrastructure, allowing for a more cost effective upgrade. This technology retained the option and opportunity to expand on meter data gathering, or to merge into an Advanced Metering Infrastructure (AMI) system in the future. Starting in 2009, the City implemented the Water Meter Replacement Program, in which 10,000 to 12,000 water meters were to be targeted for replacement each year, over a ten year period, in order to complete the transition from a manual walk-by meter reading system to a full radio-read drive-by meter reading system. Other benefits of this meter replacement program would be the virtual elimination of estimated monthly meter reads for customers, increased customer service, and less disruption to customers for meter reading as there would no longer be the need to entry the premises or yards of customers to obtain the readings Compliance Summary Report Corporation of the City of London Page 4 of 44

5 As of the end of 2018, the Water Meter Replacement Program has been completed, with nearly all of our 118,000 water meters being converted over to radio read meters, with the exception of less than 300 difficult-to-access accounts. London Hydro, our contracted water meter reading and billing contractor, initiated full drive-by meter reading for the City of London water meters in January Downtown Leak Detection Fixed Network The City consists of over 1,600 km of water main and associated hydrants, water service connections, and other appurtenances. London experiences, on average, 120 water main breaks a year, although the last several years have been below this. London s water loss level is relatively low (less than 10%; or an internationally recognized Infrastructure Leakage Index (ILI) factor of around 2.0), placing us amongst the best municipalities in rth America. Permanent leakage monitoring is a practice that has been popular in Europe and the Middle East for numerous years. Recently, it has been gaining popularity in rth America, and London had been considering it for several years. In 2018, the Water Service Area deployed Acoustic Leak Loggers on our metallic watermains in the core downtown area. They log noise levels nightly (during a quiet period), and through automatic software analysis of this data the system provides the probability of leakage based on the level and consistency of the noise. If a high leak probability is found, the data is correlated and the leak location is pin-pointed. The data is displayed on a map, and colour codes depict the probability and locations of leaks. All of this is done prior to anyone going out to the field to investigate. To date, this system has pin-pointed with high accuracy 1 watermain break, and 9 leaks (on services, hydrants or valves). The early detection of these failures allowed repair efforts to be coordinated as non-emergency events during normal working hours, minimizing both the financial, and public impact. Sampling & Water Quality Monitoring In 2018, the MECP required large municipal drinking water systems to test for 70 different organic, inorganic and chemical parameters. The City of London s water sampling regime includes monthly testing for microbiological indicators and chlorine residuals from 57 standard locations across the City, as well as nearly 2,350 random grab samples. Analysis is also performed for up to 117 parameters, including organics, inorganics, chemicals, pesticides and metals at 13 standard locations around the City. This level of testing far exceeds the MECP s minimum sampling requirements. London also has 10 locations throughout the City where continuous in-line sampling of chlorine residual and ph is monitored. Staff also perform approximately 4,000 additional chlorine tests each year related to construction and maintenance activities. All of these efforts help ensure that the water within the distribution system is always of high quality and completely safe to consume Water Quality Sampling Summary 2018 Compliance Summary Report Corporation of the City of London Page 5 of 44

6 Parameter REGULATED INORGANICS Ontario Maximum Acceptable Concentration (MAC) Antimony 6 ug/l Arsenic 25 ug/l Barium 1000 ug/l Boron 5000 ug/l Cadmium 5 ug/l Chromium 50 ug/l Fluoride 1.5 mg/l Free Chlorine Residual -- mg/l Lead 10 ug/l 0.01 <MDL Mercury 1 ug/l Selenium 10 ug/l Sodium *20 mg/l Uranium 20 ug/l Units Lab's Method Detection Limit (MDL) Measured Concentrations 2018 MAC Exceedance (Y/N) Parameter REGULATED ORGANICS Ontario Maximum Acceptable Concentration (MAC) MAC Exceedance (Y/N) Atrazine -- ug/l Atrazine + N-dealkylated metabolites 5 ug/l De-ethylated Atrazine -- ug/l 0.01 <MDL Azinphos-methyl 20 ug/l 0.05 <MDL Benzene 5 ug/l 0.32 <MDL Benzo(a)pyrene 0.01 ug/l <MDL Bromoxynil 5 ug/l 0.33 <MDL Carbaryl 90 ug/l 0.05 <MDL Carbofuran 90 ug/l 0.01 <MDL Carbon tetrachloride 5 ug/l 0.16 <MDL Chlorpyrifos 90 ug/l 0.02 <MDL Diazinon 20 ug/l 0.02 <MDL Dicamba 120 ug/l 0.2 <MDL 1,2-Dichlorobenzene 200 ug/l 0.41 <MDL 1,4-Dichlorobenzene 5 ug/l 0.36 <MDL 1,2-Dichloroethane 5 ug/l 0.35 <MDL Dichloromethane 50 ug/l 0.35 <MDL 2,4-dichlorophenol 900 ug/l 0.15 <MDL 2,4-dichlorophenoxyacetic acid (2,4-D) 100 ug/l 0.19 <MDL Diclofop-methyl 9 ug/l 0.4 <MDL Dimethoate 20 ug/l 0.03 <MDL Diquat 70 ug/l 1 <MDL Diuron 150 ug/l 0.03 <MDL Glyphosate 280 ug/l 1 <MDL Malathion 190 ug/l 0.02 <MDL MCPA -- mg/l <MDL Units Lab's Method Detection Limit (MDL) Measured Concentrations Compliance Summary Report Corporation of the City of London Page 6 of 44

7 Parameter REGULATED ORGANICS CON'T Ontario Maximum Acceptable Concentration (MAC) Metolachlor 50 ug/l 0.01 <MDL Metribuzin 80 ug/l 0.02 <MDL Monochlorobenzene 80 ug/l 0.3 <MDL Paraquat 10 ug/l 1 <MDL Pentachlorophenol -- ug/l 0.15 <MDL Phorate 2 ug/l 0.01 <MDL Picloram 190 ug/l 1 <MDL Polychlorinated Biphenyls (PCBs) 3 ug/l 0.04 <MDL Prometryne 1 ug/l 0.03 <MDL Simazine 10 ug/l 0.01 <MDL Terbufos 1 ug/l 0.01 <MDL 2,3,4,6-tetrachlorophenol 100 ug/l 0.2 <MDL Triallate 230 ug/l 0.01 <MDL Trichloroethylene 50 ug/l 0.44 <MDL 2,4,6-trichlorophenol 5 ug/l 0.25 <MDL Trifluralin 45 ug/l 0.02 <MDL Vinyl Chloride 2 ug/l 0.17 <MDL Units Lab's Method Detection Limit (MDL) Measured Concentrations <MDL MAC Exceedance (Y/N) Ontario Maximum Parameter Acceptable Concentration (MAC) NON-REGULATED INORGANICS/ORGANICS Alkalinity -- mg/l as CaCO Aluminum -- ug/l Ammonia+Ammonium (N) -- mg/l 0.04 <MDL Calcium -- mg/l Chloride -- mg/l Cobalt -- ug/l Colour -- TCU 3 <MDL Conductivity -- us/cm Copper -- ug/l Cyanide 0.2 mg/l <MDL 1,1-Dichloroethylene (vinylidene chloride) 14 ug/l 0.33 <MDL Dissolved Organic Carbon -- mg/l Ethylbenzene -- ug/l 0.33 <MDL Hardness -- mg/l as CaCO Iron -- ug/l 7 <MDL Langelier's Index -- #N/A -- <MDL Magnesium -- mg/l Manganese -- ug/l 0.01 <MDL Nickel -- ug/l Nitrogen-Kjeldahl (N) -- mg/l Organic Nitrogen -- mg/l ph -- no unit Phosphorus -- mg/l <MDL Potassium -- mg/l Units Lab's Method Detection Limit (MDL) Measured Concentrations 2018 MAC Exceedance (Y/N) 2018 Compliance Summary Report Corporation of the City of London Page 7 of 44

8 Ontario Maximum Parameter Acceptable Concentration (MAC) NON-REGULATED INORGANICS/ORGANICS CON'T Silicon -- ug/l Silicon; reactive silicate -- mg/l Silver -- ug/l Solids (Total Dissolved) -- mg/l Sulphate -- mg/l Sulphide -- mg/l <MDL Surr 1,2-Dichloroethane-d4 -- Surr Rec % Surr 4-Bromofluorobenzene -- Surr Rec % Surr Decachlorobiphenyl -- % Tetrachloroethylene (perchloroethylene) 30 ug/l 0.35 <MDL Toluene -- ug/l 0.36 <MDL Total Chlorine-Field -- mg/l ,4,5-TP (Silvex) -- ug/l 0.18 <MDL Turbidity 1 NTU Xylene (Total) -- ug/l 0.43 <MDL m/p-xylene -- ug/l 0.43 <MDL o-xylene -- ug/l 0.17 <MDL Zinc -- ug/l Units Lab's Method Detection Limit (MDL) Measured Concentrations <MDL MAC Exceedance (Y/N) Ontario Maximum Parameter Acceptable Concentration (MAC) TRIHALOMETHANES & HALOACETIC ACIDS Total Haloacetic Acids -- ug/l Dibromoacetic Acid -- ug/l 2.9 <MDL Dichloroacetic Acid -- ug/l Monobromoacetic acid -- ug/l 2.9 <MDL Monochloroacetic Acid -- ug/l 4.7 <MDL Trichloroacetic Acid -- ug/l Trihalomethanes (total) -- ug/l Bromodichloromethane -- ug/l Bromoform -- ug/l Chloroform -- ug/l Dibromochloromethane -- ug/l Units Lab's Method Detection Limit (MDL) Measured Concentrations 2018 MAC Exceedance (Y/N) NITRATES Parameter Ontario Maximum Acceptable Concentration (MAC) MAC Exceedance (Y/N) Nitrate (as nitrogen) -- mg/l Nitrate + Nitrite (as nitrogen) -- mg/l Nitrite (as nitrogen) -- mg/l Units Lab's Method Detection Limit (MDL) Measured Concentrations Compliance Summary Report Corporation of the City of London Page 8 of 44

9 Parameter MICROBIOLOGICAL Ontario Maximum Acceptable Concentration (MAC) E. coli 0 cfu/100 ml Total Coliform 0 cfu/100 ml Yes Heterotrophic Plate Count N/A cfu/1 ml Units Lab's Method Detection Limit (MDL) Measured Concentrations 2018 MAC Exceedance (Y/N) In 2018, there were eight (8) adverse microbiological results out of 2,347 samples taken. All involved the detection of Total Coliform bacteria (ranging from 1 to 16 cfu/100 ml). In each case, staff implemented the mandatory adverse response procedure, which included notifying the MECP and the Middlesex-London Health Unit, and immediately re-sampled at each location. The re-sample results revealed no adverse indicators. In all instances it is highly unlikely that there were actual water quality issues at these sites, as all adverse samples were identified as having free chlorine residuals which were well above the minimum acceptable level at the time of the sampling (ranging between 0.30 to 1.11 mg/l). E. coli and Coliform bacteria cannot survive in chlorinated water; therefore, it is suspected that post-sampling contamination occurred. The resampling results support this conclusion. The microbiological testing procedure is extremely sensitive; accidental sample contamination can occur through operator or laboratory error, despite the specific procedures and precautions being adhered to while processing samples. System Statistics and Major Events During the period from January 1, 2018 through to December 31, 2018 a total of 47,501,265,000 litres of water were purchased, at a cost of more than $25,665,000, from the Joint Water Boards and subsequently pumped into London via the Arva Pumping Station and EMPS. Average day demand was 129,244,000 litres. Peak day consumption of 170,735,000 litres occurred on June 17, A summary of system pumpage can be found starting on page 32. The data includes monthly average and maximum daily flows. These values are also compared to the rated flow rate capacities identified in London s Municipal Drinking Water Licence. There were no occurrences of flow rate exceedance during the specified time period. Listed below are some 2018 statistics for the City of London Distribution System: 2018 Compliance Summary Report Corporation of the City of London Page 9 of 44

10 Approximate Replacement Value of Drinking Water System $4,500,000,000 Number of Pumping Stations 8 Number of Fire Hydrants 9,455 Number of Watermain Valves 13,629 Total Number of Water Services 116,211 Length of Watermain 1,601 km Number of Watermain Breaks 98 Number of Water Service Leaks 228 Municipalities Receiving London Water In the Municipality of Middlesex Centre, the villages of Arva, Ballymote, and Delaware continued to receive their drinking water under contract from the City of London during The Municipality of Middlesex Centre has been provided a copy of the Annual Report as per O. Reg 170/03. Several residences within Central Elgin also continued to receive drinking water from the transmission watermain that supplies the City of London from the EMPS. For this reason, Central Elgin has also been provided a copy of the report Compliance Summary Report Corporation of the City of London Page 10 of 44

11 2018 Annual Report (London)

12 Drinking-Water System Number: Municipal Drinking-Water Licence: Drinking-Water System Name: London Water Supply Drinking-Water System Owner: The Corporation of the City of London Drinking-Water System Category: Large Municipal Residential System Period being reported: January 1, 2017 to December 31, 2017 Complete if your Category is Large Municipal Residential or Small Municipal Residential Does your Drinking-Water System serve more than 10,000 people? Yes [ ] [ ] Is your annual report available to the public at no charge on a web site on the Internet? Yes [ ] [ ] Location where Summary Report required under O. Reg. 170/03 Schedule 22 will be available for inspection. City of London City Hall Customer Service Division 8 th Floor (Public Service Information Area) 300 Dufferin Avenue, London, ON Complete for all other Categories. Number of Designated Facilities served: N/A Did you provide a copy of your annual report to all Designated Facilities you serve? N/A Number of Interested Authorities you report to: N/A Did you provide a copy of your annual report to all Interested Authorities you report to for each Designated Facility? Yes [ ] [ ] N/A [ ] te: For the following tables below, additional rows or columns may be added or an appendix may be attached to the report List all Drinking-Water Systems (if any), which receive all of their drinking water from your system: Drinking Water System Name Drinking Water System Number Middlesex Centre Distribution System Includes: Arva Waterworks Ballymote Waterworks Delaware Distribution System Did you provide a copy of your annual report to all Drinking-Water System owners that are connected to you and to whom you provide all of its drinking water? Yes [ ] [ ] Page 12 of 44

13 Indicate how you notified system users that your annual report is available, and is free of charge. [ ] Public access/notice via the web [ ] Public access/notice via Government Office [ ] Public access/notice via a newspaper [ ] Public access/notice via Public Request [ ] Public access/notice via a Public Library [ ] Public access/notice via other method _EnviroWorks Pamphlet Describe your Drinking-Water System There are two primary water supplies in the City of London. Primary Treated Water Sources (surface water) - Lake Huron Primary Water Supply System (LHPWSS) - Elgin Area Primary Water Supply System (EAPWSS) During 2018 the London-Elgin-Middlesex Booster Station was operated by a designated Operating Authority that being, Ontario Clean Water Agency. The annual report for the London-Elgin-Middlesex Booster Station was not available at the time this report was created and therefore, it will be provided under separate cover. List all water treatment chemicals used over this reporting period Liquid Chlorine Sodium Hypochlorite Fluorosilicic Acid (hydrofluorosilicic acid) Were any significant expenses incurred to? [ ] Install required equipment [ ] Repair required equipment [ ] Replace required equipment Please provide a brief description and breakdown of monetary expenses incurred Large numbers of Water Service Leaks continue to dominate repair/remediation efforts. In excess of 250 water service leaks occurred in 2018, attributing to more than a 3:1 ratio of water service leaks to water main breaks. Page 13 of 44

14 Provide details on the notices submitted in accordance with subsection 18(1) of the Safe Drinking-Water Act or section 16-4 of Schedule 16 of O.Reg.170/03 and reported to Spills Action Centre. Parameters Adverse Incident Date Corrective Action Corrective Action Date Adverse Water Quality Indicator # (AWQI #) E. coli (cfu/100ml) Total Coliform (cfu/100ml) HPC / Background (cfu/1ml) Free Cl2 (mg/l) 23-May Resample 24-May Resample 24-May Resample 24-May May < Resample 25-May Resample 25-May Resample 25-May Jun < Resample 5-Jun Resample 5-Jun Resample 5-Jun Jul Resample 1-Aug Resample 1-Aug Resample 1-Aug Sep Resample 15-Sep Resample 15-Sep Resample 15-Sep Sep < Resample 18-Sep Resample 18-Sep Resample 18-Sep Sep < < Resample 19-Sep Resample 19-Sep Resample 19-Sep Resample 19-Sep Resample 19-Sep Page 14 of 44

15 Parameters Adverse Incident Date Corrective Action Corrective Action Date Adverse Water Quality Indicator # (AWQI #) E. coli (cfu/100ml) Total Coliform (cfu/100ml) HPC / Background (cfu/1ml) Free Cl2 (mg/l) 12-Dec Resample 13-Dec Resample 13-Dec Resample 13-Dec tes: 1 Details: 1 Total Coliform was detected in a sample taken from a hydrant at 130 Dundas Street. Corrective Action: After the sample was collected, but before the results were received, the watermain from which the sample was drawn was disconnected from the distribution system because a new, replacement watermain is being installed. A temporary, overland watermain was installed in the interim, and the re-samples were collected from the temporary watermain. The original site was immediately re-sampled and samples were also taken at sites upstream and downstream from the original site. There were no indicators of adverse water quality in any of the re-sample results. Free chlorine concentration of 0.30 mg/l for the original sample is indicative of a false positive. 2 Details: 1 Total Coliform was detected in a sample taken from 70 Gammage Street (Knollwood PS). Corrective Action: The original site was immediately re-sampled and samples were also taken at sites upstream and downstream from the original site. There were no indicators of adverse water quality in any of the re-sample results. Free chlorine concentration of 0.69 mg/l for the original sample is indicative of a false positive. 3 Details: 4 Total Coliform was detected in a sample collected from 645 Springbank Drive. Corrective Action: Facility was locked so re-sample was taken at hydrant in front of building. Samples were also taken at sites upstream and downstream from the original site. There were no indicators of adverse water quality in any of the re-sample results Free chlorine concentration of 0.76 mg/l for the original sample is indicative of a false positive. Page 15 of 44

16 4 Details: 1 Total Coliform was detected in a sample taken from a hydrant at 357 Hollywood Court. Corrective Action: The original site was immediately re-sampled and samples were also taken at sites upstream and downstream from the original site. There were no indicators of adverse water quality in any of the re-sample results. Free chlorine concentration of 0.41 mg/l for the original sample is indicative of a false positive. 5 Details: 1 Total Coliform was detected in a sample taken from 1245 Highbury Avenue. Corrective Action: The original site was immediately re-sampled and samples were also taken at sites upstream and downstream from the original site. There were no indicators of adverse water quality in any of the re-sample results. Free chlorine concentration of 1.11 mg/l for the original sample is indicative of a false positive. 6 Details: 16 Total Coliform was detected in a sample collected from 869 Commissioners Rd W. (#2Reservoir). Corrective Action: The original site was immediately re-sampled and samples were also taken at sites upstream and downstream from the original site. There were no indicators of adverse water quality in any of the re-sample results. Free chlorine concentration of 0.68 mg/l for the original sample is indicative of a false positive. 7 Details: 2 Total Coliform was detected in a sample collected from Medway Rd. (Arva PS) and 2 Total Coliform was detected in a sample collected from 1121 Commissioners Rd. E. (Pond Mills PS). Corrective Action: The original sites were immediately re-sampled and samples were also taken at sites downstream from the original sites. For one site, an upstream sample was also taken. The other site (Arva Pumping Station) had no upstream sampling site as this is the point of entry to London s water system from the Lake Huron Primary Water Supply System. There were no indicators of adverse water quality in any of the re-sample results. Free chlorine concentrations of 0.90 and 1.00 mg/l for the original samples is indicative of false positives. 8 Details: 1 Total Coliform was detected in a sample collected from a hydrant on the southeast corner of Highbury Avenue and Edgevalley Road. Corrective Action: The original site was immediately re-sampled and samples were also taken at sites upstream and downstream from the original site. There were no indicators of adverse water quality in any of the re-sample results. Free chlorine concentration of 0.91 mg/l for the original sample is indicative of a false positive. Page 16 of 44

17 Microbiological testing done under the Schedule 10, 11 or 12 of Regulation 170/03, during this reporting period. # of E. coli Samples Taken Range of E. coli (cfu/100ml) # of Total Coliform Samples Taken Range of Coliform (cfu/100ml) # of HPC / Background Samples Range of HPC (cfu/1ml) Treated N/A N/A N/A N/A N/A N/A Distribution Operational testing done under Schedule 7, 8 or 9 of Regulation 170/03 during the period covered by this Annual Report. Turbidity # of Grab Continuous Samples Monitoring 2 N/A Range of Results NTU Alkalinity 5 N/A mg/l as CaCO 3 Lead 5 N/A µg/l Chlorine* mg/l Fluoride** mg/l *London has 10 locations with continuous online chlorine monitoring **Continuous online fluoride monitoring occurs at Arva and SERPs NOTE: For continuous monitors use 8760 as the number of samples. Page 17 of 44

18 Summary of Inorganic parameters tested during this reporting period or the most recent sample results. As outlined below, sampling was carried out for inorganic and organic parameters at the following sites: Arva Pumping Station and Southeast Reservoir and Pumping Station. SITE: Arva Pumping Station - Treated Distribution a) INORGANIC PARAMETERS (including lead, sodium, nitrate, nitrite, and fluoride) Date of Municipal Drinking Water Licence Parameter Sam ple Date Result Value Unit of Measure Exceedance September 21, 2017 Antimony 27/Jun/ ug/l N September 21, 2017 Arsenic 27/Jun/ ug/l N September 21, 2017 Barium 27/Jun/ ug/l N September 21, 2017 Boron 27/Jun/18 15 ug/l N September 21, 2017 Cadmium 27/Jun/ ug/l N September 21, 2017 Chromium 27/Jun/ ug/l N September 21, 2017 Fluoride 3/Jan/ mg/l N September 21, 2017 Fluoride 10/Jan/ mg/l N September 21, 2017 Fluoride 24/Jan/ mg/l N September 21, 2017 Fluoride 31/Jan/ mg/l N September 21, 2017 Fluoride 7/Feb/ mg/l N September 21, 2017 Fluoride 14/Feb/ mg/l N September 21, 2017 Fluoride 21/Feb/ mg/l N September 21, 2017 Fluoride 28/Feb/ mg/l N September 21, 2017 Fluoride 7/Mar/ mg/l N September 21, 2017 Fluoride 14/Mar/ mg/l N September 21, 2017 Fluoride 21/Mar/ mg/l N September 21, 2017 Fluoride 28/Mar/ mg/l N September 21, 2017 Fluoride 4/Apr/ mg/l N September 21, 2017 Fluoride 11/Apr/ mg/l N September 21, 2017 Fluoride 18/Apr/ mg/l N September 21, 2017 Fluoride 25/Apr/ mg/l N September 21, 2017 Fluoride 2/May/ mg/l N September 21, 2017 Fluoride 9/May/ mg/l N September 21, 2017 Fluoride 16/May/ mg/l N September 21, 2017 Fluoride 23/May/ mg/l N September 21, 2017 Fluoride 30/May/ mg/l N September 21, 2017 Fluoride 6/Jun/ mg/l N September 21, 2017 Fluoride 13/Jun/ mg/l N September 21, 2017 Fluoride 20/Jun/ mg/l N September 21, 2017 Fluoride 27/Jun/ mg/l N September 21, 2017 Fluoride 4/Jul/ mg/l N September 21, 2017 Fluoride 11/Jul/ mg/l N September 21, 2017 Fluoride 18/Jul/ mg/l N September 21, 2017 Fluoride 25/Jul/ mg/l N September 21, 2017 Fluoride 1/Aug/ mg/l N September 21, 2017 Fluoride 8/Aug/ mg/l N September 21, 2017 Fluoride 15/Aug/ mg/l N Page 18 of 44

19 September 21, 2017 Fluoride 29/Aug/ mg/l N September 21, 2017 Fluoride 5/Sep/ mg/l N September 21, 2017 Fluoride 12/Sep/ mg/l N September 21, 2017 Fluoride 19/Sep/ mg/l N September 21, 2017 Fluoride 26/Sep/ mg/l N September 21, 2017 Fluoride 3/Oct/ mg/l N September 21, 2017 Fluoride 10/Oct/ mg/l N September 21, 2017 Fluoride 17/Oct/ mg/l N September 21, 2017 Fluoride 24/Oct/ mg/l N September 21, 2017 Fluoride 31/Oct/ mg/l N September 21, 2017 Fluoride 7/v/ mg/l N September 21, 2017 Fluoride 14/v/ mg/l N September 21, 2017 Fluoride 22/v/ mg/l N September 21, 2017 Fluoride 28/v/ mg/l N September 21, 2017 Fluoride 5/Dec/ mg/l N September 21, 2017 Fluoride 12/Dec/ mg/l N September 21, 2017 Fluoride 19/Dec/ mg/l N September 21, 2017 Fluoride 27/Dec/ mg/l N September 21, 2017 Lead 28/Mar/ <MDL ug/l N September 21, 2017 Lead 27/Jun/ <MDL ug/l N September 21, 2017 Lead 13/Dec/ <MDL ug/l N September 21, 2017 Mercury 27/Jun/ ug/l N September 21, 2017 Nitrate (as nitrogen) 15/Mar/ mg/l N September 21, 2017 Nitrate (as nitrogen) 27/Jun/ mg/l N September 21, 2017 Nitrate (as nitrogen) 27/Jun/ mg/l N September 21, 2017 Nitrate (as nitrogen) 17/Sep/ mg/l N September 21, 2017 Nitrate (as nitrogen) 12/Dec/ mg/l N September 21, 2017 Nitrate + Nitrite (as nitrogen) 15/Mar/ mg/l N September 21, 2017 Nitrate + Nitrite (as nitrogen) 27/Jun/ mg/l N September 21, 2017 Nitrate + Nitrite (as nitrogen) 27/Jun/ mg/l N September 21, 2017 Nitrate + Nitrite (as nitrogen) 17/Sep/ mg/l N September 21, 2017 Nitrate + Nitrite (as nitrogen) 12/Dec/ mg/l N September 21, 2017 Nitrite (as nitrogen) 15/Mar/ <MDL mg/l N September 21, 2017 Nitrite (as nitrogen) 27/Jun/ <MDL mg/l N September 21, 2017 Nitrite (as nitrogen) 27/Jun/ <MDL mg/l N September 21, 2017 Nitrite (as nitrogen) 17/Sep/ <MDL mg/l N September 21, 2017 Nitrite (as nitrogen) 12/Dec/ <MDL mg/l N September 21, 2017 Selenium 27/Jun/ ug/l N September 21, 2017 Sodium 27/Jun/ mg/l N September 21, 2017 Uranium 27/Jun/ ug/l N Page 19 of 44

20 b) ORGANIC PARAMETERS (including THM & HAA) Date of Municipal Drinking Water Licence Parameter Sam ple Date Result Value Unit of Measure Exceedance September 21, 2017 Alachlor 27/Jun/ ug/l N September 21, 2017 Atrazine 27/Jun/ ug/l N September 21, 2017 Atrazine + N-dealkylated metabolites 27/Jun/ ug/l N September 21, 2017 De-ethylated Atrazine 27/Jun/ ug/l N September 21, 2017 Azinphos-methyl 27/Jun/ <MDL ug/l N September 21, 2017 Benzene 27/Jun/ <MDL ug/l N September 21, 2017 Benzo(a)pyrene 27/Jun/ <MDL ug/l N September 21, 2017 Bromoxynil 27/Jun/ <MDL ug/l N September 21, 2017 Carbaryl 27/Jun/ <MDL ug/l N September 21, 2017 Carbofuran 27/Jun/ <MDL ug/l N September 21, 2017 Carbon tetrachloride 27/Jun/ <MDL ug/l N September 21, 2017 Chlorpyrifos 27/Jun/ <MDL ug/l N September 21, 2017 Diazinon 27/Jun/ <MDL ug/l N September 21, 2017 Dicamba 27/Jun/ <MDL ug/l N September 21, ,2-Dichlorobenzene 27/Jun/ <MDL ug/l N September 21, ,4-Dichlorobenzene 27/Jun/ <MDL ug/l N September 21, ,2-Dichloroethane 27/Jun/ <MDL ug/l N September 21, 2017 Dichloromethane 27/Jun/ <MDL ug/l N September 21, ,4-dichlorophenol 27/Jun/ <MDL ug/l N September 21, ,4-dichlorophenoxyacetic acid (2,4-D) 27/Jun/ <MDL ug/l N September 21, 2017 Diclofop-methyl 27/Jun/ <MDL ug/l N September 21, 2017 Dimethoate 27/Jun/ <MDL ug/l N September 21, 2017 Diquat 27/Jun/18 1 <MDL ug/l N September 21, 2017 Diuron 27/Jun/ <MDL ug/l N September 21, 2017 Glyphosate 27/Jun/18 1 <MDL ug/l N September 21, 2017 Malathion 27/Jun/ <MDL ug/l N September 21, 2017 MCPA 27/Jun/ <MDL mg/l N September 21, 2017 Metolachlor 27/Jun/ <MDL ug/l N September 21, 2017 Metribuzin 27/Jun/ <MDL ug/l N September 21, 2017 Paraquat 27/Jun/18 1 <MDL ug/l N September 21, 2017 Pentachlorophenol 27/Jun/ <MDL ug/l N September 21, 2017 Phorate 27/Jun/ <MDL ug/l N September 21, 2017 Picloram 27/Jun/18 1 <MDL ug/l N September 21, 2017 Polychlorinated Biphenyls (PCBs) 27/Jun/ <MDL ug/l N September 21, 2017 Prometryne 27/Jun/ <MDL ug/l N September 21, 2017 Simazine 27/Jun/ <MDL ug/l N September 21, 2017 Terbufos 27/Jun/ <MDL ug/l N September 21, ,3,4,6-tetrachlorophenol 27/Jun/ <MDL ug/l N September 21, 2017 Triallate 27/Jun/ <MDL ug/l N September 21, 2017 Trichloroethylene 27/Jun/ <MDL ug/l N September 21, ,4,6-trichlorophenol 27/Jun/ <MDL ug/l N September 21, 2017 Trifluralin 27/Jun/ <MDL ug/l N Page 20 of 44

21 September 21, 2017 Total Haloacetic Acids 15/Mar/ ug/l N September 21, 2017 Dibromoacetic Acid 15/Mar/18 2 <MDL ug/l N September 21, 2017 Dichloroacetic Acid 15/Mar/ ug/l N September 21, 2017 Monobromoacetic acid 15/Mar/ <MDL ug/l N September 21, 2017 Monochloroacetic Acid 15/Mar/ <MDL ug/l N September 21, 2017 Trichloroacetic Acid 15/Mar/ ug/l N September 21, 2017 Total Haloacetic Acids 27/Jun/ ug/l N September 21, 2017 Dibromoacetic Acid 27/Jun/18 2 <MDL ug/l N September 21, 2017 Dichloroacetic Acid 27/Jun/ ug/l N September 21, 2017 Monobromoacetic acid 27/Jun/ <MDL ug/l N September 21, 2017 Monochloroacetic Acid 27/Jun/ <MDL ug/l N September 21, 2017 Trichloroacetic Acid 27/Jun/ <MDL ug/l N September 21, 2017 Total Haloacetic Acids 17/Sep/ ug/l N September 21, 2017 Dibromoacetic Acid 17/Sep/18 2 <MDL ug/l N September 21, 2017 Dichloroacetic Acid 17/Sep/ ug/l N September 21, 2017 Monobromoacetic acid 17/Sep/ <MDL ug/l N September 21, 2017 Monochloroacetic Acid 17/Sep/ <MDL ug/l N September 21, 2017 Trichloroacetic Acid 17/Sep/ <MDL ug/l N September 21, 2017 Total Haloacetic Acids 12/Dec/ <MDL ug/l N September 21, 2017 Dibromoacetic Acid 12/Dec/18 2 <MDL ug/l N September 21, 2017 Dichloroacetic Acid 12/Dec/ ug/l N September 21, 2017 Monobromoacetic acid 12/Dec/ <MDL ug/l N September 21, 2017 Monochloroacetic Acid 12/Dec/ <MDL ug/l N September 21, 2017 Trichloroacetic Acid 12/Dec/ <MDL ug/l N September 21, 2017 Trihalomethanes (total) 15/Mar/18 24 ug/l N September 21, 2017 Bromodichloromethane 15/Mar/ ug/l N September 21, 2017 Bromoform 15/Mar/ <MDL ug/l N September 21, 2017 Chloroform 15/Mar/18 15 ug/l N September 21, 2017 Dibromochloromethane 15/Mar/18 2 ug/l N September 21, 2017 Trihalomethanes (total) 27/Jun/18 19 ug/l N September 21, 2017 Bromodichloromethane 27/Jun/ ug/l N September 21, 2017 Bromoform 27/Jun/ <MDL ug/l N September 21, 2017 Chloroform 27/Jun/18 11 ug/l N September 21, 2017 Dibromochloromethane 27/Jun/ ug/l N September 21, 2017 Trihalomethanes (total) 17/Sep/18 23 ug/l N September 21, 2017 Bromodichloromethane 17/Sep/18 7 ug/l N September 21, 2017 Bromoform 17/Sep/ <MDL ug/l N September 21, 2017 Chloroform 17/Sep/18 13 ug/l N September 21, 2017 Dibromochloromethane 17/Sep/ ug/l N September 21, 2017 Trihalomethanes (total) 12/Dec/18 17 ug/l N September 21, 2017 Bromodichloromethane 12/Dec/ ug/l N September 21, 2017 Bromoform 12/Dec/ <MDL ug/l N September 21, 2017 Chloroform 12/Dec/ ug/l N September 21, 2017 Dibromochloromethane 12/Dec/ ug/l N September 21, 2017 Vinyl Chloride 27/Jun/ <MDL ug/l N Page 21 of 44

22 c) NON-REGULATED INORGANIC/ORGANIC PARAMETERS Date of Municipal Drinking Water Licence Parameter Sam ple Date Result Value Unit of Measure Exceedance September 21, 2017 Alkalinity 27/Jun/18 79 mg/l as CaCO3 N September 21, 2017 Aluminum 27/Jun/ ug/l N September 21, 2017 Ammonia+Ammonium (N) 27/Jun/ <MDL mg/l N September 21, 2017 Calcium 27/Jun/ mg/l N September 21, 2017 Chloride 27/Jun/ mg/l N September 21, 2017 Cobalt 27/Jun/ ug/l N September 21, 2017 Colour 27/Jun/18 6 TCU N September 21, 2017 Conductivity 27/Jun/ us/cm N September 21, 2017 Copper 27/Jun/ ug/l N September 21, 2017 Cyanide 27/Jun/ <MDL mg/l N September 21, ,1-Dichloroethylene (vinylidene chloride) 27/Jun/ <MDL ug/l N September 21, 2017 Dissolved Organic Carbon 27/Jun/18 1 mg/l N September 21, 2017 Ethylbenzene 27/Jun/ <MDL ug/l N September 21, 2017 Hardness 27/Jun/ mg/l as CaCO3 N September 21, 2017 Iron 27/Jun/18 7 <MDL ug/l N September 21, 2017 Magnesium 27/Jun/ mg/l N September 21, 2017 Manganese 27/Jun/ <MDL ug/l N September 21, 2017 Monochlorobenzene 27/Jun/ <MDL ug/l N September 21, 2017 Nickel 27/Jun/ ug/l N September 21, 2017 Nitrogen-Kjeldahl (N) 27/Jun/ mg/l N September 21, 2017 Organic Nitrogen 27/Jun/ <MDL mg/l N September 21, 2017 ph 27/Jun/ no unit N September 21, 2017 Phosphorus 27/Jun/ <MDL mg/l N September 21, 2017 Potassium 27/Jun/ mg/l N September 21, 2017 Silicon 27/Jun/ ug/l N September 21, 2017 Silicon; reactive silicate 27/Jun/ mg/l N September 21, 2017 Silver 27/Jun/18 0 <MDL ug/l N September 21, 2017 Solids (Total Dissolved) 27/Jun/ mg/l N September 21, 2017 Sulphate 27/Jun/18 24 mg/l N September 21, 2017 Sulphide 27/Jun/ <MDL mg/l N September 21, 2017 Surr 1,2-Dichloroethane-d4 27/Jun/ Surr Rec % N September 21, 2017 Surr 4-Bromofluorobenzene 27/Jun/18 93 Surr Rec % N September 21, 2017 Surr Decachlorobiphenyl 27/Jun/18 93 % N September 21, 2017 Tetrachloroethylene (perchloroethylene) 27/Jun/ <MDL ug/l N September 21, 2017 Toluene 27/Jun/ <MDL ug/l N September 21, 2017 Total Chlorine-Field 27/Jun/ mg/l N September 21, ,4,5-TP (Silvex) 27/Jun/ <MDL ug/l N September 21, 2017 Turbidity 27/Jun/ NTU N September 21, 2017 Xylene (Total) 27/Jun/ <MDL ug/l N September 21, 2017 m/p-xylene 27/Jun/ <MDL ug/l N September 21, 2017 o-xylene 27/Jun/ <MDL ug/l N September 21, 2017 Zinc 27/Jun/18 2 ug/l N Page 22 of 44

23 SITE: Southeast Reservoir and Pumping Station - Treated Distribution a) INORGANIC PARAMETERS (including lead, sodium, nitrate, nitrite, and fluoride) Date of Municipal Drinking Water Licence Parameter Sam ple Date Result Value Unit of Measure Exceedance September 21, 2017 Antimony 27/Jun/ ug/l N September 21, 2017 Arsenic 27/Jun/ ug/l N September 21, 2017 Barium 27/Jun/ ug/l N September 21, 2017 Boron 27/Jun/18 23 ug/l N September 21, 2017 Cadmium 27/Jun/ ug/l N September 21, 2017 Chromium 27/Jun/ ug/l N September 21, 2017 Fluoride 3/Jan/ mg/l N September 21, 2017 Fluoride 10/Jan/ mg/l N September 21, 2017 Fluoride 24/Jan/ mg/l N September 21, 2017 Fluoride 31/Jan/ mg/l N September 21, 2017 Fluoride 7/Feb/ mg/l N September 21, 2017 Fluoride 14/Feb/ mg/l N September 21, 2017 Fluoride 21/Feb/ mg/l N September 21, 2017 Fluoride 28/Feb/ mg/l N September 21, 2017 Fluoride 7/Mar/ mg/l N September 21, 2017 Fluoride 14/Mar/ mg/l N September 21, 2017 Fluoride 21/Mar/ mg/l N September 21, 2017 Fluoride 28/Mar/ mg/l N September 21, 2017 Fluoride 4/Apr/ mg/l N September 21, 2017 Fluoride 11/Apr/ mg/l N September 21, 2017 Fluoride 18/Apr/ mg/l N September 21, 2017 Fluoride 25/Apr/ mg/l N September 21, 2017 Fluoride 2/May/ mg/l N September 21, 2017 Fluoride 9/May/ mg/l N September 21, 2017 Fluoride 16/May/ mg/l N September 21, 2017 Fluoride 23/May/ mg/l N September 21, 2017 Fluoride 30/May/ mg/l N September 21, 2017 Fluoride 6/Jun/ mg/l N September 21, 2017 Fluoride 13/Jun/ mg/l N September 21, 2017 Fluoride 20/Jun/ mg/l N September 21, 2017 Fluoride 27/Jun/ mg/l N September 21, 2017 Fluoride 4/Jul/ mg/l N September 21, 2017 Fluoride 11/Jul/ mg/l N September 21, 2017 Fluoride 18/Jul/ mg/l N September 21, 2017 Fluoride 25/Jul/ mg/l N September 21, 2017 Fluoride 1/Aug/ mg/l N September 21, 2017 Fluoride 8/Aug/ mg/l N September 21, 2017 Fluoride 15/Aug/ mg/l N September 21, 2017 Fluoride 29/Aug/ mg/l N Page 23 of 44

24 September 21, 2017 Fluoride 5/Sep/ mg/l N September 21, 2017 Fluoride 12/Sep/ mg/l N September 21, 2017 Fluoride 19/Sep/ mg/l N September 21, 2017 Fluoride 26/Sep/ mg/l N September 21, 2017 Fluoride 3/Oct/ mg/l N September 21, 2017 Fluoride 10/Oct/ mg/l N September 21, 2017 Fluoride 17/Oct/ mg/l N September 21, 2017 Fluoride 24/Oct/ mg/l N September 21, 2017 Fluoride 31/Oct/ mg/l N September 21, 2017 Fluoride 7/v/ mg/l N September 21, 2017 Fluoride 14/v/ mg/l N September 21, 2017 Fluoride 21/v/ mg/l N September 21, 2017 Fluoride 28/v/ mg/l N September 21, 2017 Fluoride 5/Dec/ mg/l N September 21, 2017 Fluoride 12/Dec/ mg/l N September 21, 2017 Fluoride 19/Dec/ mg/l N September 21, 2017 Fluoride 27/Dec/ mg/l N September 21, 2017 Lead 28/Mar/ <MDL ug/l N September 21, 2017 Lead 27/Jun/ <MDL ug/l N September 21, 2017 Lead 13/Dec/ <MDL ug/l N September 21, 2017 Mercury 27/Jun/ ug/l N September 21, 2017 Nitrate (as nitrogen) 15/Mar/ mg/l N September 21, 2017 Nitrate (as nitrogen) 27/Jun/ mg/l N September 21, 2017 Nitrate (as nitrogen) 27/Jun/ mg/l N September 21, 2017 Nitrate (as nitrogen) 17/Sep/ mg/l N September 21, 2017 Nitrate (as nitrogen) 12/Dec/ mg/l N September 21, 2017 Nitrate + Nitrite (as nitrogen) 15/Mar/ mg/l N September 21, 2017 Nitrate + Nitrite (as nitrogen) 27/Jun/ mg/l N September 21, 2017 Nitrate + Nitrite (as nitrogen) 27/Jun/ mg/l N September 21, 2017 Nitrate + Nitrite (as nitrogen) 17/Sep/ mg/l N September 21, 2017 Nitrate + Nitrite (as nitrogen) 12/Dec/ mg/l N September 21, 2017 Nitrite (as nitrogen) 15/Mar/ <MDL mg/l N September 21, 2017 Nitrite (as nitrogen) 27/Jun/ <MDL mg/l N September 21, 2017 Nitrite (as nitrogen) 27/Jun/ <MDL mg/l N September 21, 2017 Nitrite (as nitrogen) 17/Sep/ <MDL mg/l N September 21, 2017 Nitrite (as nitrogen) 12/Dec/ <MDL mg/l N September 21, 2017 Selenium 27/Jun/ ug/l N September 21, 2017 Sodium 27/Jun/ mg/l N September 21, 2017 Uranium 27/Jun/ ug/l N Page 24 of 44

25 b) ORGANIC PARAMETERS (including THM & HAA) Date of Municipal Drinking Water Licence Parameter Sam ple Date Result Value Unit of Measure Exceedance September 21, 2017 Alachlor 27/Jun/ ug/l N September 21, 2017 Atrazine 27/Jun/ ug/l N September 21, 2017 Atrazine + N-dealkylated metabolites 27/Jun/ ug/l N September 21, 2017 De-ethylated Atrazine 27/Jun/ ug/l N September 21, 2017 Azinphos-methyl 27/Jun/ <MDL ug/l N September 21, 2017 Benzene 27/Jun/ <MDL ug/l N September 21, 2017 Benzo(a)pyrene 27/Jun/ <MDL ug/l N September 21, 2017 Bromoxynil 27/Jun/ <MDL ug/l N September 21, 2017 Carbaryl 27/Jun/ <MDL ug/l N September 21, 2017 Carbofuran 27/Jun/ <MDL ug/l N September 21, 2017 Carbon tetrachloride 27/Jun/ <MDL ug/l N September 21, 2017 Chlorpyrifos 27/Jun/ <MDL ug/l N September 21, 2017 Diazinon 27/Jun/ <MDL ug/l N September 21, 2017 Dicamba 27/Jun/ <MDL ug/l N September 21, ,2-Dichlorobenzene 27/Jun/ <MDL ug/l N September 21, ,4-Dichlorobenzene 27/Jun/ <MDL ug/l N September 21, ,2-Dichloroethane 27/Jun/ <MDL ug/l N September 21, 2017 Dichloromethane 27/Jun/ <MDL ug/l N September 21, ,4-dichlorophenol 27/Jun/ <MDL ug/l N September 21, ,4-dichlorophenoxyacetic acid (2,4-D) 27/Jun/ <MDL ug/l N September 21, 2017 Diclofop-methyl 27/Jun/ <MDL ug/l N September 21, 2017 Dimethoate 27/Jun/ <MDL ug/l N September 21, 2017 Diquat 27/Jun/18 1 <MDL ug/l N September 21, 2017 Diuron 27/Jun/ <MDL ug/l N September 21, 2017 Glyphosate 27/Jun/18 1 <MDL ug/l N September 21, 2017 Malathion 27/Jun/ <MDL ug/l N September 21, 2017 MCPA 27/Jun/ <MDL mg/l N September 21, 2017 Metolachlor 27/Jun/ ug/l N September 21, 2017 Metribuzin 27/Jun/ <MDL ug/l N September 21, 2017 Paraquat 27/Jun/18 1 <MDL ug/l N September 21, 2017 Pentachlorophenol 27/Jun/ <MDL ug/l N September 21, 2017 Phorate 27/Jun/ <MDL ug/l N September 21, 2017 Picloram 27/Jun/18 1 <MDL ug/l N September 21, 2017 Polychlorinated Biphenyls (PCBs) 27/Jun/ <MDL ug/l N September 21, 2017 Prometryne 27/Jun/ <MDL ug/l N September 21, 2017 Simazine 27/Jun/ <MDL ug/l N September 21, 2017 Terbufos 27/Jun/ <MDL ug/l N September 21, ,3,4,6-tetrachlorophenol 27/Jun/ <MDL ug/l N September 21, 2017 Triallate 27/Jun/ <MDL ug/l N September 21, 2017 Trichloroethylene 27/Jun/ <MDL ug/l N September 21, ,4,6-trichlorophenol 27/Jun/ <MDL ug/l N September 21, 2017 Trifluralin 27/Jun/ <MDL ug/l N Page 25 of 44

26 September 21, 2017 Total Haloacetic Acids 15/Mar/ ug/l N September 21, 2017 Dibromoacetic Acid 15/Mar/18 2 <MDL ug/l N September 21, 2017 Dichloroacetic Acid 15/Mar/ ug/l N September 21, 2017 Monobromoacetic acid 15/Mar/ <MDL ug/l N September 21, 2017 Monochloroacetic Acid 15/Mar/ <MDL ug/l N September 21, 2017 Trichloroacetic Acid 15/Mar/ ug/l N September 21, 2017 Total Haloacetic Acids 27/Jun/ ug/l N September 21, 2017 Dibromoacetic Acid 27/Jun/18 2 <MDL ug/l N September 21, 2017 Dichloroacetic Acid 27/Jun/18 12 ug/l N September 21, 2017 Monobromoacetic acid 27/Jun/ <MDL ug/l N September 21, 2017 Monochloroacetic Acid 27/Jun/ <MDL ug/l N September 21, 2017 Trichloroacetic Acid 27/Jun/ ug/l N September 21, 2017 Total Haloacetic Acids 17/Sep/ ug/l N September 21, 2017 Dibromoacetic Acid 17/Sep/18 2 <MDL ug/l N September 21, 2017 Dichloroacetic Acid 17/Sep/ ug/l N September 21, 2017 Monobromoacetic acid 17/Sep/ <MDL ug/l N September 21, 2017 Monochloroacetic Acid 17/Sep/ <MDL ug/l N September 21, 2017 Trichloroacetic Acid 17/Sep/ ug/l N September 21, 2017 Total Haloacetic Acids 12/Dec/ ug/l N September 21, 2017 Dibromoacetic Acid 12/Dec/18 2 <MDL ug/l N September 21, 2017 Dichloroacetic Acid 12/Dec/18 9 ug/l N September 21, 2017 Monobromoacetic acid 12/Dec/ <MDL ug/l N September 21, 2017 Monochloroacetic Acid 12/Dec/ <MDL ug/l N September 21, 2017 Trichloroacetic Acid 12/Dec/ ug/l N September 21, 2017 Trihalomethanes (total) 15/Mar/18 20 ug/l N September 21, 2017 Bromodichloromethane 15/Mar/18 7 ug/l N September 21, 2017 Bromoform 15/Mar/ <MDL ug/l N September 21, 2017 Chloroform 15/Mar/ ug/l N September 21, 2017 Dibromochloromethane 15/Mar/ ug/l N September 21, 2017 Trihalomethanes (total) 27/Jun/18 30 ug/l N September 21, 2017 Bromodichloromethane 27/Jun/ ug/l N September 21, 2017 Bromoform 27/Jun/ <MDL ug/l N September 21, 2017 Chloroform 27/Jun/18 18 ug/l N September 21, 2017 Dibromochloromethane 27/Jun/ ug/l N September 21, 2017 Trihalomethanes (total) 17/Sep/18 43 ug/l N September 21, 2017 Bromodichloromethane 17/Sep/18 11 ug/l N September 21, 2017 Bromoform 17/Sep/ ug/l N September 21, 2017 Chloroform 17/Sep/18 27 ug/l N September 21, 2017 Dibromochloromethane 17/Sep/ ug/l N September 21, 2017 Trihalomethanes (total) 12/Dec/18 21 ug/l N September 21, 2017 Bromodichloromethane 12/Dec/ ug/l N September 21, 2017 Bromoform 12/Dec/ <MDL ug/l N September 21, 2017 Chloroform 12/Dec/18 12 ug/l N September 21, 2017 Dibromochloromethane 12/Dec/ ug/l N September 21, 2017 Vinyl Chloride 27/Jun/ <MDL ug/l N Page 26 of 44

27 c) NON-REGULATED INORGANIC/ORGANIC PARAMETERS Date of Municipal Drinking Water Licence Parameter Sam ple Date Result Value Unit of Measure Exceedance September 21, 2017 Alkalinity 27/Jun/18 93 mg/l as CaCO3 N September 21, 2017 Aluminum 27/Jun/ ug/l N September 21, 2017 Ammonia+Ammonium (N) 27/Jun/ <MDL mg/l N September 21, 2017 Calcium 27/Jun/ mg/l N September 21, 2017 Chloride 27/Jun/18 19 mg/l N September 21, 2017 Cobalt 27/Jun/ ug/l N September 21, 2017 Colour 27/Jun/18 3 TCU N September 21, 2017 Conductivity 27/Jun/ us/cm N September 21, 2017 Copper 27/Jun/ ug/l N September 21, 2017 Cyanide; total 27/Jun/ <MDL mg/l N September 21, ,1-Dichloroethylene (vinylidene chloride) 27/Jun/ <MDL ug/l N September 21, 2017 Dissolved Organic Carbon 27/Jun/18 2 mg/l N September 21, 2017 Ethylbenzene 27/Jun/ <MDL ug/l N September 21, 2017 Hardness 27/Jun/ mg/l as CaCO3 N September 21, 2017 Iron 27/Jun/18 7 <MDL ug/l N September 21, 2017 Magnesium 27/Jun/ mg/l N September 21, 2017 Manganese 27/Jun/ <MDL ug/l N September 21, 2017 Monochlorobenzene 27/Jun/ <MDL ug/l N September 21, 2017 Nickel 27/Jun/ ug/l N September 21, 2017 Nitrogen-Kjeldahl (N) 27/Jun/ mg/l N September 21, 2017 Organic Nitrogen 27/Jun/ mg/l N September 21, 2017 ph 27/Jun/ no unit N September 21, 2017 Phosphorus 27/Jun/ <MDL mg/l N September 21, 2017 Potassium 27/Jun/ mg/l N September 21, 2017 Silicon 27/Jun/ ug/l N September 21, 2017 Silicon; reactive silicate 27/Jun/ mg/l N September 21, 2017 Silver 27/Jun/ ug/l N September 21, 2017 Solids (Total Dissolved) 27/Jun/ mg/l N September 21, 2017 Sulphate 27/Jun/18 33 mg/l N September 21, 2017 Sulphide 27/Jun/ <MDL mg/l N September 21, 2017 Surr 1,2-Dichloroethane-d4 27/Jun/ Surr Rec % N September 21, 2017 Surr 4-Bromofluorobenzene 27/Jun/18 93 Surr Rec % N September 21, 2017 Surr Decachlorobiphenyl 27/Jun/18 88 % N September 21, 2017 Tetrachloroethylene (perchloroethylene) 27/Jun/ <MDL ug/l N September 21, 2017 Toluene 27/Jun/ <MDL ug/l N September 21, 2017 Total Chlorine-Field 27/Jun/ mg/l N September 21, ,4,5-TP (Silvex) 27/Jun/ <MDL ug/l N September 21, 2017 Turbidity 27/Jun/ NTU N September 21, 2017 Xylene (Total) 27/Jun/ <MDL ug/l N September 21, 2017 m/p-xylene 27/Jun/ <MDL ug/l N September 21, 2017 o-xylene 27/Jun/ <MDL ug/l N September 21, 2017 Zinc 27/Jun/18 1 ug/l N Page 27 of 44

28 Summary of Inorganic/Organic parameters tested during this reporting period. As outlined below, sampling was carried out for THM s & HAA s at 603 Wonderland Rd. S., 525 Crestwood Dr., 214 Rathowan St., 4318 Colonel Talbot Rd., and 950 East Springbank Gate. SITE: 603 Wonderland Rd. S. - Treated Distribution b) ORGANIC PARAMETERS (THM & HAA) Date of Municipal Drinking Water Licence Parameter Sam ple Date Result Value Unit of Measure Exceedance September 21, 2017 Total Haloacetic Acids 19/Sep/ ug/l N September 21, 2017 (Dibromoacetic Acid) 19/Sep/18 2 <MDL ug/l N September 21, 2017 (Dichloroacetic Acid) 19/Sep/ ug/l N September 21, 2017 (Monobromoacetic acid) 19/Sep/ <MDL ug/l N September 21, 2017 (Monochloroacetic Acid) 19/Sep/ <MDL ug/l N September 21, 2017 (Trichloroacetic Acid) 19/Sep/ ug/l N September 21, 2017 Total Haloacetic Acids 12/Dec/ ug/l N September 21, 2017 (Dibromoacetic Acid) 12/Dec/18 2 <MDL ug/l N September 21, 2017 (Dichloroacetic Acid) 12/Dec/ ug/l N September 21, 2017 (Monobromoacetic acid) 12/Dec/ <MDL ug/l N September 21, 2017 (Monochloroacetic Acid) 12/Dec/ <MDL ug/l N September 21, 2017 (Trichloroacetic Acid) 12/Dec/ ug/l N SITE: 525 Crestwood Dr. - Treated Distribution b) ORGANIC PARAMETERS (THM & HAA) Date of Municipal Drinking Water Licence Parameter Sam ple Date Result Value Unit of Measure Exceedance September 21, 2017 Total Haloacetic Acids 19/Sep/ ug/l N September 21, 2017 (Dibromoacetic Acid) 19/Sep/18 2 <MDL ug/l N September 21, 2017 (Dichloroacetic Acid) 19/Sep/ ug/l N September 21, 2017 (Monobromoacetic acid) 19/Sep/ <MDL ug/l N September 21, 2017 (Monochloroacetic Acid) 19/Sep/ <MDL ug/l N September 21, 2017 (Trichloroacetic Acid) 19/Sep/ ug/l N September 21, 2017 Total Haloacetic Acids 12/Dec/ ug/l N September 21, 2017 (Dibromoacetic Acid) 12/Dec/18 2 <MDL ug/l N September 21, 2017 (Dichloroacetic Acid) 12/Dec/ ug/l N September 21, 2017 (Monobromoacetic acid) 12/Dec/ <MDL ug/l N September 21, 2017 (Monochloroacetic Acid) 12/Dec/ <MDL ug/l N September 21, 2017 (Trichloroacetic Acid) 12/Dec/ ug/l N Page 28 of 44

29 SITE: Fire Hydrant at 214 Rathowan St. - Treated Distribution b) ORGANIC PARAMETERS (THM & HAA) Date of Municipal Drinking Water Licence Parameter Sam ple Date Result Value Unit of Measure Exceedance September 21, 2017 Total Haloacetic Acids 15/Mar/ ug/l N September 21, 2017 (Dibromoacetic Acid) 15/Mar/18 2 <MDL ug/l N September 21, 2017 (Dichloroacetic Acid) 15/Mar/18 11 ug/l N September 21, 2017 (Monobromoacetic acid) 15/Mar/ <MDL ug/l N September 21, 2017 (Monochloroacetic Acid) 15/Mar/ <MDL ug/l N September 21, 2017 (Trichloroacetic Acid) 15/Mar/ ug/l N September 21, 2017 Total Haloacetic Acids 27/Jun/18 14 ug/l N September 21, 2017 (Dibromoacetic Acid) 27/Jun/18 2 <MDL ug/l N September 21, 2017 (Dichloroacetic Acid) 27/Jun/ ug/l N September 21, 2017 (Monobromoacetic acid) 27/Jun/ <MDL ug/l N September 21, 2017 (Monochloroacetic Acid) 27/Jun/ <MDL ug/l N September 21, 2017 (Trichloroacetic Acid) 27/Jun/ ug/l N September 21, 2017 Total Haloacetic Acids 18/Sep/ ug/l N September 21, 2017 (Dibromoacetic Acid) 18/Sep/18 2 <MDL ug/l N September 21, 2017 (Dichloroacetic Acid) 18/Sep/ ug/l N September 21, 2017 (Monobromoacetic acid) 18/Sep/ <MDL ug/l N September 21, 2017 (Monochloroacetic Acid) 18/Sep/ <MDL ug/l N September 21, 2017 (Trichloroacetic Acid) 18/Sep/ ug/l N September 21, 2017 Total Haloacetic Acids 12/Dec/ ug/l N September 21, 2017 (Dibromoacetic Acid) 12/Dec/18 2 <MDL ug/l N September 21, 2017 (Dichloroacetic Acid) 12/Dec/ ug/l N September 21, 2017 (Monobromoacetic acid) 12/Dec/ <MDL ug/l N September 21, 2017 (Monochloroacetic Acid) 12/Dec/ <MDL ug/l N September 21, 2017 (Trichloroacetic Acid) 12/Dec/ ug/l N September 21, 2017 Trihalomethanes (total) 15/Mar/18 27 ug/l N September 21, 2017 (bromodichloromethane) 15/Mar/ ug/l N September 21, 2017 (bromoform) 15/Mar/ <MDL ug/l N September 21, 2017 (chloroform) 15/Mar/18 17 ug/l N September 21, 2017 (dibromochloromethane) 15/Mar/18 2 ug/l N September 21, 2017 Trihalomethanes (total) 27/Jun/18 25 ug/l N September 21, 2017 (bromodichloromethane) 27/Jun/ ug/l N September 21, 2017 (bromoform) 27/Jun/ <MDL ug/l N September 21, 2017 (chloroform) 27/Jun/18 16 ug/l N September 21, 2017 (dibromochloromethane) 27/Jun/ ug/l N September 21, 2017 Trihalomethanes (total) 18/Sep/18 29 ug/l N September 21, 2017 (bromodichloromethane) 18/Sep/ ug/l N September 21, 2017 (bromoform) 18/Sep/ <MDL ug/l N September 21, 2017 (chloroform) 18/Sep/18 18 ug/l N September 21, 2017 (dibromochloromethane) 18/Sep/ ug/l N September 21, 2017 Trihalomethanes (total) 12/Dec/18 21 ug/l N September 21, 2017 (bromodichloromethane) 12/Dec/ ug/l N September 21, 2017 (bromoform) 12/Dec/ <MDL ug/l N September 21, 2017 (chloroform) 12/Dec/18 13 ug/l N September 21, 2017 (dibromochloromethane) 12/Dec/ ug/l N Page 29 of 44

30 SITE: 4318 Colonel Talbot Rd. - Treated Distribution b) ORGANIC PARAMETERS (THM & HAA) Date of Municipal Drinking Water Licence Parameter Sam ple Date Result Value Unit of Measure Exceedance September 21, 2017 Total Haloacetic Acids 15/Mar/ ug/l N September 21, 2017 (Dibromoacetic Acid) 15/Mar/18 2 <MDL ug/l N September 21, 2017 (Dichloroacetic Acid) 15/Mar/ ug/l N September 21, 2017 (Monobromoacetic acid) 15/Mar/ <MDL ug/l N September 21, 2017 (Monochloroacetic Acid) 15/Mar/ <MDL ug/l N September 21, 2017 (Trichloroacetic Acid) 15/Mar/ ug/l N September 21, 2017 Total Haloacetic Acids 27/Jun/ ug/l N September 21, 2017 (Dibromoacetic Acid) 27/Jun/18 2 <MDL ug/l N September 21, 2017 (Dichloroacetic Acid) 27/Jun/ ug/l N September 21, 2017 (Monobromoacetic acid) 27/Jun/ <MDL ug/l N September 21, 2017 (Monochloroacetic Acid) 27/Jun/ <MDL ug/l N September 21, 2017 (Trichloroacetic Acid) 27/Jun/ ug/l N September 21, 2017 Total Haloacetic Acids 18/Sep/ ug/l N September 21, 2017 (Dibromoacetic Acid) 18/Sep/18 2 <MDL ug/l N September 21, 2017 (Dichloroacetic Acid) 18/Sep/ ug/l N September 21, 2017 (Monobromoacetic acid) 18/Sep/ <MDL ug/l N September 21, 2017 (Monochloroacetic Acid) 18/Sep/ <MDL ug/l N September 21, 2017 (Trichloroacetic Acid) 18/Sep/ ug/l N September 21, 2017 Total Haloacetic Acids 12/Dec/ ug/l N September 21, 2017 (Dibromoacetic Acid) 12/Dec/18 2 <MDL ug/l N September 21, 2017 (Dichloroacetic Acid) 12/Dec/ ug/l N September 21, 2017 (Monobromoacetic acid) 12/Dec/ <MDL ug/l N September 21, 2017 (Monochloroacetic Acid) 12/Dec/ <MDL ug/l N September 21, 2017 (Trichloroacetic Acid) 12/Dec/ ug/l N September 21, 2017 Trihalomethanes (total) 15/Mar/18 25 ug/l N September 21, 2017 (bromodichloromethane) 15/Mar/ ug/l N September 21, 2017 (bromoform) 15/Mar/ <MDL ug/l N September 21, 2017 (chloroform) 15/Mar/18 13 ug/l N September 21, 2017 (dibromochloromethane) 15/Mar/ ug/l N September 21, 2017 Trihalomethanes (total) 27/Jun/18 35 ug/l N September 21, 2017 (bromodichloromethane) 27/Jun/18 9 ug/l N September 21, 2017 (bromoform) 27/Jun/ <MDL ug/l N September 21, 2017 (chloroform) 27/Jun/18 23 ug/l N September 21, 2017 (dibromochloromethane) 27/Jun/ ug/l N September 21, 2017 Trihalomethanes (total) 18/Sep/18 51 ug/l N September 21, 2017 (bromodichloromethane) 18/Sep/18 12 ug/l N September 21, 2017 (bromoform) 18/Sep/ ug/l N September 21, 2017 (chloroform) 18/Sep/18 33 ug/l N September 21, 2017 (dibromochloromethane) 18/Sep/ ug/l N September 21, 2017 Trihalomethanes (total) 12/Dec/18 23 ug/l N September 21, 2017 (bromodichloromethane) 12/Dec/ ug/l N September 21, 2017 (bromoform) 12/Dec/ <MDL ug/l N September 21, 2017 (chloroform) 12/Dec/18 13 ug/l N September 21, 2017 (dibromochloromethane) 12/Dec/ ug/l N Page 30 of 44

31 SITE: 950 East Springbank Gate - Treated Distribution b) ORGANIC PARAMETERS (THM & HAA) Date of Municipal Drinking Water Licence Parameter Sam ple Date Result Value Unit of Measure Exceedance September 21, 2017 Total Haloacetic Acids 19/Sep/ ug/l ug/l September 21, 2017 (Dibromoacetic Acid) 19/Sep/18 2 <MDL ug/l ug/l September 21, 2017 (Dichloroacetic Acid) 19/Sep/ ug/l ug/l September 21, 2017 (Monobromoacetic acid) 19/Sep/ <MDL ug/l ug/l September 21, 2017 (Monochloroacetic Acid) 19/Sep/ <MDL ug/l ug/l September 21, 2017 (Trichloroacetic Acid) 19/Sep/ ug/l ug/l September 21, 2017 Total Haloacetic Acids 12/Dec/ ug/l ug/l September 21, 2017 (Dibromoacetic Acid) 12/Dec/18 2 <MDL ug/l ug/l September 21, 2017 (Dichloroacetic Acid) 12/Dec/ ug/l ug/l September 21, 2017 (Monobromoacetic acid) 12/Dec/ <MDL ug/l ug/l September 21, 2017 (Monochloroacetic Acid) 12/Dec/ <MDL ug/l ug/l September 21, 2017 (Trichloroacetic Acid) 12/Dec/ ug/l ug/l List any Inorganic or Organic parameter(s) that exceeded half the standard prescribed in Schedule 2 of Ontario Drinking Water Quality Standards. ne. Page 31 of 44

32 2018 Summary of Water Pumpage

33 DAY DATE SERPS PUMPAGE (m 3 ) ARVA PUMPAGE (m 3 ) TOTAL LONDON CONSUMPTION (m 3 ) Monday 1/Jan/18 16, , ,435 Tuesday 2/Jan/18 18,776 93, ,157 Wednesday 3/Jan/18 20,128 99, ,117 Thursday 4/Jan/18 20,069 99, ,678 Friday 5/Jan/18 20,083 99, ,739 Saturday 6/Jan/18 21,860 95, ,299 Sunday 7/Jan/18 21,833 99, ,225 Monday 8/Jan/18 21, , ,966 Tuesday 9/Jan/18 21,746 99, ,627 Wednesday 10/Jan/18 21, , ,848 Thursday 11/Jan/18 22, , ,256 Friday 12/Jan/18 22, , ,254 Saturday 13/Jan/18 22, , ,202 Sunday 14/Jan/18 22, , ,997 Monday 15/Jan/18 22,278 85, ,362 Tuesday 16/Jan/18 22, , ,388 Wednesday 17/Jan/18 22,184 99, ,845 Thursday 18/Jan/18 20, , ,085 Friday 19/Jan/18 20, , ,033 Saturday 20/Jan/18 20, , ,763 Sunday 21/Jan/18 20,179 99, ,811 Monday 22/Jan/18 20, , ,288 Tuesday 23/Jan/18 20, , ,230 Wednesday 24/Jan/18 20, , ,415 Thursday 25/Jan/18 20, , ,693 Friday 26/Jan/18 15, , ,415 Saturday 27/Jan/18 17, , ,746 Sunday 28/Jan/18 14, , ,848 Monday 29/Jan/18 18, , ,109 Tuesday 30/Jan/18 30,061 49, ,653 Wednesday 31/Jan/18 33,559 77, ,173 January 2018 Monthly Max 33, , ,202 January 2018 Monthly Average 21, , ,474 January 2018 Total 636,137 3,050,048 3,704,224 Page 33 of 44

34 DAY DATE SERPS PUMPAGE (m 3 ) ARVA PUMPAGE (m 3 ) TOTAL LONDON CONSUMPTION (m 3 ) Thursday 1/Feb/18 20, , ,169 Friday 2/Feb/18 20, , ,791 Saturday 3/Feb/18 20, , ,191 Sunday 4/Feb/18 20, , ,285 Monday 5/Feb/18 20,584 98, ,340 Tuesday 6/Feb/18 33,204 78, ,993 Wednesday 7/Feb/18 22, , ,092 Thursday 8/Feb/18 23,621 95, ,744 Friday 9/Feb/18 23,933 99, ,596 Saturday 10/Feb/18 23,970 94, ,658 Sunday 11/Feb/18 24,140 99, ,650 Monday 12/Feb/18 24, , ,411 Tuesday 13/Feb/18 24,046 94, ,531 Wednesday 14/Feb/18 24, , ,361 Thursday 15/Feb/18 24,221 94, ,284 Friday 16/Feb/18 23,551 94, ,651 Saturday 17/Feb/18 24,868 94, ,468 Sunday 18/Feb/18 24,367 90, ,688 Monday 19/Feb/18 22,707 94, ,454 Tuesday 20/Feb/18 22,828 95, ,371 Wednesday 21/Feb/18 22,781 90, ,939 Thursday 22/Feb/18 40,067 76, ,467 Friday 23/Feb/18 26,164 95, ,173 Saturday 24/Feb/18 15, , ,828 Sunday 25/Feb/18 16, , ,570 Monday 26/Feb/18 16, , ,697 Tuesday 27/Feb/18 16, , ,244 Wednesday 28/Feb/18 23,735 94, ,299 February 2018 Monthly Max 40, , ,361 February 2018 Monthly Max 23,168 98, ,819 February 2018 Total 648,716 2,755,311 3,382,944 Page 34 of 44

35 DAY DATE SERPS PUMPAGE (m 3 ) ARVA PUMPAGE (m 3 ) TOTAL LONDON CONSUMPTION (m 3 ) Thursday 1/Mar/18 23,645 95, ,727 Friday 2/Mar/18 23,714 94, ,448 Saturday 3/Mar/18 23,685 95, ,715 Sunday 4/Mar/18 23, , ,479 Monday 5/Mar/18 15, , ,876 Tuesday 6/Mar/18 11, , ,456 Wednesday 7/Mar/18 11, , ,507 Thursday 8/Mar/18 11, , ,881 Friday 9/Mar/18 18,911 99, ,016 Saturday 10/Mar/18 19, , ,578 Sunday 11/Mar/18 19,763 97, ,202 Monday 12/Mar/18 20,977 99, ,919 Tuesday 13/Mar/18 16,112 90, ,293 Wednesday 14/Mar/18 21, , ,711 Thursday 15/Mar/18 22,051 99, ,182 Friday 16/Mar/18 21,292 98, ,714 Saturday 17/Mar/18 21,389 94, ,451 Sunday 18/Mar/18 21,637 95, ,145 Monday 19/Mar/18 24,307 99, ,625 Tuesday 20/Mar/18 25, , ,665 Wednesday 21/Mar/18 25,471 93, ,002 Thursday 22/Mar/18 23,778 93, ,403 Friday 23/Mar/18 22,884 95, ,502 Saturday 24/Mar/18 21,294 94, ,280 Sunday 25/Mar/18 21,307 95, ,595 Monday 26/Mar/18 21,176 99, ,439 Tuesday 27/Mar/18 21, , ,410 Wednesday 28/Mar/18 19,990 98, ,472 Thursday 29/Mar/18 20,112 95, ,419 Friday 30/Mar/18 20,398 90, ,580 Saturday 31/Mar/18 20,461 90, ,407 March 2018 Monthly Max 25, , ,479 March 2018 Monthly Average 20,489 98, ,261 March 2018 Total 635,173 3,061,702 3,697,100 Page 35 of 44

36 DAY DATE SERPS PUMPAGE (m 3 ) ARVA PUMPAGE (m 3 ) TOTAL LONDON CONSUMPTION (m 3 ) Sunday 1/Apr/18 20,362 90, ,347 Monday 2/Apr/18 20,525 90, ,560 Tuesday 3/Apr/18 23,841 94, ,272 Wednesday 4/Apr/18 23,912 93, ,244 Thursday 5/Apr/18 25,012 93, ,909 Friday 6/Apr/18 22, , ,120 Saturday 7/Apr/18 20,633 99, ,964 Sunday 8/Apr/18 19, , ,861 Monday 9/Apr/18 20, , ,518 Tuesday 10/Apr/18 20,654 87, ,960 Wednesday 11/Apr/18 23,476 98, ,683 Thursday 12/Apr/18 23, , ,230 Friday 13/Apr/18 21, , ,459 Saturday 14/Apr/18 17,261 95, ,512 Sunday 15/Apr/18 23,080 89, ,740 Monday 16/Apr/18 21,361 95, ,542 Tuesday 17/Apr/18 24, , ,784 Wednesday 18/Apr/18 35,592 90, ,666 Thursday 19/Apr/18 21,688 94, ,952 Friday 20/Apr/18 21,897 99, ,895 Saturday 21/Apr/18 20,598 99, ,228 Sunday 22/Apr/18 20, , ,071 Monday 23/Apr/18 17, , ,676 Tuesday 24/Apr/18 19, , ,143 Wednesday 25/Apr/18 19, , ,043 Thursday 26/Apr/18 19, , ,766 Friday 27/Apr/18 19, , ,791 Saturday 28/Apr/18 19,807 99, ,972 Sunday 29/Apr/18 19, , ,013 Monday 30/Apr/18 21, , ,997 April 2018 Monthly Max 35, , ,071 April 2018 Monthly Average 21,605 99, ,931 April 2018 Total 648,135 2,976,962 3,627,916 Page 36 of 44

37 DAY DATE SERPS PUMPAGE (m 3 ) ARVA PUMPAGE (m 3 ) TOTAL LONDON CONSUMPTION (m 3 ) Tuesday 1/May/18 21, , ,859 Wednesday 2/May/18 14, , ,582 Thursday 3/May/18 19, , ,611 Friday 4/May/18 23, , ,909 Saturday 5/May/18 22, , ,553 Sunday 6/May/18 23, , ,792 Monday 7/May/18 22, , ,788 Tuesday 8/May/18 20, , ,122 Wednesday 9/May/18 23, , ,716 Thursday 10/May/18 21, , ,929 Friday 11/May/18 22, , ,560 Saturday 12/May/18 23,214 98, ,371 Sunday 13/May/18 23,048 94, ,752 Monday 14/May/18 26, , ,173 Tuesday 15/May/18 18, , ,789 Wednesday 16/May/18 21, , ,377 Thursday 17/May/18 20, , ,971 Friday 18/May/18 20, , ,308 Saturday 19/May/18 20, , ,770 Sunday 20/May/18 20, , ,980 Monday 21/May/18 20, , ,934 Tuesday 22/May/18 21, , ,731 Wednesday 23/May/18 20, , ,462 Thursday 24/May/18 22, , ,850 Friday 25/May/18 23, , ,540 Saturday 26/May/18 21, , ,716 Sunday 27/May/18 21, , ,195 Monday 28/May/18 21, , ,701 Tuesday 29/May/18 21, , ,398 Wednesday 30/May/18 21, , ,956 Thursday 31/May/18 20, , ,907 May 2018 Monthly Max 26, , ,398 May 2018 Monthly Average 21, , ,719 May 2018 Total 669,035 3,484,476 4,145,302 Page 37 of 44

38 DAY DATE SERPS PUMPAGE (m 3 ) ARVA PUMPAGE (m 3 ) TOTAL LONDON CONSUMPTION (m 3 ) Friday 1/Jun/18 21, , ,107 Saturday 2/Jun/18 17, , ,271 Sunday 3/Jun/18 17, , ,710 Monday 4/Jun/18 18, , ,185 Tuesday 5/Jun/18 19, , ,608 Wednesday 6/Jun/18 19, , ,366 Thursday 7/Jun/18 17, , ,007 Friday 8/Jun/18 18, , ,478 Saturday 9/Jun/18 16, , ,612 Sunday 10/Jun/18 16, , ,554 Monday 11/Jun/18 20, , ,657 Tuesday 12/Jun/18 20, , ,000 Wednesday 13/Jun/18 20, , ,260 Thursday 14/Jun/18 15, , ,155 Friday 15/Jun/18 20, , ,423 Saturday 16/Jun/18 20, , ,111 Sunday 17/Jun/18 21, , ,735 Monday 18/Jun/18 23, , ,670 Tuesday 19/Jun/18 20, , ,299 Wednesday 20/Jun/18 19, , ,533 Thursday 21/Jun/18 19, , ,432 Friday 22/Jun/18 19, , ,812 Saturday 23/Jun/18 18, , ,078 Sunday 24/Jun/18 20, , ,158 Monday 25/Jun/18 20, , ,764 Tuesday 26/Jun/18 20, , ,661 Wednesday 27/Jun/18 20, , ,223 Thursday 28/Jun/18 20, , ,074 Friday 29/Jun/18 21, , ,095 Saturday 30/Jun/18 23, , ,604 June 2018 Monthly Max 23, , ,735 June 2018 Monthly Average 19, , ,721 June 2018 Total 593,719 3,823,971 4,401,641 Page 38 of 44

39 DAY DATE SERPS PUMPAGE (m 3 ) ARVA PUMPAGE (m 3 ) TOTAL LONDON CONSUMPTION (m 3 ) Sunday 1/Jul/18 22, , ,726 Monday 2/Jul/18 20, , ,810 Tuesday 3/Jul/18 21, , ,428 Wednesday 4/Jul/18 22, , ,460 Thursday 5/Jul/18 24, , ,419 Friday 6/Jul/18 22, , ,522 Saturday 7/Jul/18 22, , ,765 Sunday 8/Jul/18 22, , ,988 Monday 9/Jul/18 21, , ,871 Tuesday 10/Jul/18 22, , ,377 Wednesday 11/Jul/18 22, , ,516 Thursday 12/Jul/18 22, , ,387 Friday 13/Jul/18 21, , ,229 Saturday 14/Jul/18 22, , ,495 Sunday 15/Jul/18 22, , ,867 Monday 16/Jul/18 21, , ,476 Tuesday 17/Jul/18 22, , ,997 Wednesday 18/Jul/18 23, , ,494 Thursday 19/Jul/18 24, , ,053 Friday 20/Jul/18 24, , ,972 Saturday 21/Jul/18 24, , ,089 Sunday 22/Jul/18 22, , ,439 Monday 23/Jul/18 22,151 95, ,245 Tuesday 24/Jul/18 22, , ,049 Wednesday 25/Jul/18 23, , ,118 Thursday 26/Jul/18 20, , ,653 Friday 27/Jul/18 20, , ,107 Saturday 28/Jul/18 20, , ,088 Sunday 29/Jul/18 20, , ,468 Monday 30/Jul/18 14, , ,061 Tuesday 31/Jul/18 11, , ,152 July 2018 Monthly Max 24, , ,387 July 2018 Monthly Average 21, , ,365 July 2018 Total 673,813 3,867,193 4,568,318 Page 39 of 44

40 DAY DATE SERPS PUMPAGE (m 3 ) ARVA PUMPAGE (m 3 ) TOTAL LONDON CONSUMPTION (m 3 ) Wednesday 1/Aug/18 11, , ,591 Thursday 2/Aug/18 16, , ,654 Friday 3/Aug/18 22, , ,915 Saturday 4/Aug/18 22, , ,986 Sunday 5/Aug/18 22, , ,174 Monday 6/Aug/18 22, , ,376 Tuesday 7/Aug/18 27, , ,930 Wednesday 8/Aug/18 25, , ,974 Thursday 9/Aug/18 19, , ,673 Friday 10/Aug/18 23, , ,607 Saturday 11/Aug/18 17, , ,048 Sunday 12/Aug/18 17, , ,499 Monday 13/Aug/18 13, , ,577 Tuesday 14/Aug/18 17, , ,024 Wednesday 15/Aug/18 22, , ,267 Thursday 16/Aug/18 22, , ,632 Friday 17/Aug/18 23, , ,229 Saturday 18/Aug/18 24, , ,384 Sunday 19/Aug/18 25, , ,039 Monday 20/Aug/18 24, , ,311 Tuesday 21/Aug/18 22, , ,375 Wednesday 22/Aug/18 23, , ,561 Thursday 23/Aug/18 23, , ,694 Friday 24/Aug/18 24, , ,257 Saturday 25/Aug/18 24, , ,600 Sunday 26/Aug/18 25, , ,701 Monday 27/Aug/18 24,813 93, ,142 Tuesday 28/Aug/18 24, , ,304 Wednesday 29/Aug/18 22, , ,327 Thursday 30/Aug/18 22, , ,870 Friday 31/Aug/18 25, , ,091 August 2018 Monthly Max 27, , ,267 August 2018 Monthly Average 22, , ,962 August 2018 Total 692,808 3,601,102 4,276,812 Page 40 of 44

41 DAY DATE SERPS PUMPAGE (m 3 ) ARVA PUMPAGE (m 3 ) TOTAL LONDON CONSUMPTION (m 3 ) Saturday 1/Sep/18 24, , ,565 Sunday 2/Sep/18 24, , ,959 Monday 3/Sep/18 24, , ,036 Tuesday 4/Sep/18 21, , ,634 Wednesday 5/Sep/18 22, , ,092 Thursday 6/Sep/18 22, , ,508 Friday 7/Sep/18 18, , ,522 Saturday 8/Sep/18 19, , ,008 Sunday 9/Sep/18 19, , ,214 Monday 10/Sep/18 18, , ,119 Tuesday 11/Sep/18 21, , ,846 Wednesday 12/Sep/18 22, , ,153 Thursday 13/Sep/18 19, , ,777 Friday 14/Sep/18 13, , ,046 Saturday 15/Sep/18 17, , ,127 Sunday 16/Sep/18 18, , ,854 Monday 17/Sep/18 20, , ,083 Tuesday 18/Sep/18 22, , ,732 Wednesday 19/Sep/18 23,262 87, ,042 Thursday 20/Sep/18 22, , ,369 Friday 21/Sep/18 25, , ,334 Saturday 22/Sep/18 24, , ,364 Sunday 23/Sep/18 24, , ,490 Monday 24/Sep/18 23, , ,505 Tuesday 25/Sep/18 23, , ,509 Wednesday 26/Sep/18 20, , ,516 Thursday 27/Sep/18 22, , ,692 Friday 28/Sep/18 23, , ,201 Saturday 29/Sep/18 23, , ,538 Sunday 30/Sep/18 21,845 99, ,704 September 2018 Monthly Max 25, , ,092 September 2018 Monthly Average 21, , ,351 September 2018 Total 654,086 3,461,003 4,120,539 Page 41 of 44

42 DAY DATE SERPS PUMPAGE (m 3 ) ARVA PUMPAGE (m 3 ) TOTAL LONDON CONSUMPTION (m 3 ) Monday 1/Oct/18 22, , ,555 Tuesday 2/Oct/18 22, , ,899 Wednesday 3/Oct/18 22, , ,775 Thursday 4/Oct/18 22, , ,951 Friday 5/Oct/18 20, , ,364 Saturday 6/Oct/18 21,084 99, ,420 Sunday 7/Oct/18 21,048 99, ,652 Monday 8/Oct/18 22,759 87, ,345 Tuesday 9/Oct/18 22, , ,873 Wednesday 10/Oct/18 22, , ,781 Thursday 11/Oct/18 22, , ,639 Friday 12/Oct/18 22,301 98, ,289 Saturday 13/Oct/18 22,581 99, ,253 Sunday 14/Oct/18 23,539 99, ,218 Monday 15/Oct/18 20, , ,882 Tuesday 16/Oct/18 22, , ,200 Wednesday 17/Oct/18 22,912 95, ,291 Thursday 18/Oct/18 22,785 99, ,539 Friday 19/Oct/18 24,347 94, ,355 Saturday 20/Oct/18 23,034 98, ,174 Sunday 21/Oct/18 23, , ,847 Monday 22/Oct/18 23,055 98, ,522 Tuesday 23/Oct/18 23,100 99, ,276 Wednesday 24/Oct/18 23,079 98, ,859 Thursday 25/Oct/18 22, , ,409 Friday 26/Oct/18 22,318 99, ,285 Saturday 27/Oct/18 22,460 94, ,979 Sunday 28/Oct/18 21,940 99, ,105 Monday 29/Oct/18 22, , ,303 Tuesday 30/Oct/18 22, , ,505 Wednesday 31/Oct/18 22,513 94, ,249 October 2018 Monthly Max 24, , ,781 October 2018 Monthly Average 22, , ,445 October 2018 Total 698,537 3,134,158 3,826,794 Page 42 of 44

43 DAY DATE SERPS PUMPAGE (m 3 ) ARVA PUMPAGE (m 3 ) TOTAL LONDON CONSUMPTION (m 3 ) Thursday 1/v/18 22,333 94, ,934 Friday 2/v/18 22,207 94, ,702 Saturday 3/v/18 21,948 94, ,648 Sunday 4/v/18 23, , ,799 Monday 5/v/18 22,881 99, ,059 Tuesday 6/v/18 23,172 93, ,735 Wednesday 7/v/18 22, , ,156 Thursday 8/v/18 22, , ,060 Friday 9/v/18 23,523 99, ,599 Saturday 10/v/18 18, , ,679 Sunday 11/v/18 26,939 95, ,268 Monday 12/v/18 24,772 98, ,368 Tuesday 13/v/18 27,693 89, ,115 Wednesday 14/v/18 25,826 89, ,265 Thursday 15/v/18 30,687 99, ,301 Friday 16/v/18 27,092 89, ,047 Saturday 17/v/18 24,964 90, ,949 Sunday 18/v/18 29,928 90, ,281 Monday 19/v/18 29,928 94, ,214 Tuesday 20/v/18 29,915 99, ,981 Wednesday 21/v/18 29,858 92, ,003 Thursday 22/v/18 29,893 94, ,412 Friday 23/v/18 29,928 94, ,391 Saturday 24/v/18 29,998 94, ,084 Sunday 25/v/18 29,950 87, ,952 Monday 26/v/18 29,921 84, ,345 Tuesday 27/v/18 27,614 87, ,047 Wednesday 28/v/18 24,572 87, ,056 Thursday 29/v/18 24,321 87, ,219 Friday 30/v/18 29,937 92, ,941 vember 2018 Monthly Max 30, , ,412 vember 2018 Monthly Average 26,253 94, ,320 vember 2018 Total 787,577 2,822,202 3,639,610 Page 43 of 44

44 DAY DATE SERPS PUMPAGE (m 3 ) ARVA PUMPAGE (m 3 ) TOTAL LONDON CONSUMPTION (m 3 ) Saturday 1/Dec/18 29,927 93, ,374 Sunday 2/Dec/18 28,396 87, ,649 Monday 3/Dec/18 29,788 94, ,401 Tuesday 4/Dec/18 29,367 92, ,825 Wednesday 5/Dec/18 29,878 93, ,017 Thursday 6/Dec/18 31,140 91, ,794 Friday 7/Dec/18 30,652 91, ,641 Saturday 8/Dec/18 31,113 92, ,848 Sunday 9/Dec/18 27, , ,878 Monday 10/Dec/18 21, , ,115 Tuesday 11/Dec/18 19, , ,014 Wednesday 12/Dec/18 18, , ,646 Thursday 13/Dec/18 15, , ,503 Friday 14/Dec/18 16, , ,239 Saturday 15/Dec/18 16, , ,270 Sunday 16/Dec/18 16, , ,380 Monday 17/Dec/18 16, , ,530 Tuesday 18/Dec/18 16, , ,362 Wednesday 19/Dec/18 16, , ,936 Thursday 20/Dec/18 16, , ,889 Friday 21/Dec/18 16, , ,739 Saturday 22/Dec/18 16,322 91, ,109 Sunday 23/Dec/18 16, , ,685 Monday 24/Dec/18 16,332 89, ,930 Tuesday 25/Dec/18 16,346 87, ,197 Wednesday 26/Dec/18 16,632 89, ,568 Thursday 27/Dec/18 16,835 87, ,849 Friday 28/Dec/18 16, , ,704 Saturday 29/Dec/18 16, , ,940 Sunday 30/Dec/18 16,807 97, ,828 Monday 31/Dec/18 16,901 93, ,591 December 2018 Monthly Max 31, , ,878 December 2018 Monthly Average 20,698 98, ,466 December 2018 Total 641,640 3,044,679 3,672,452 Page 44 of 44

45 2018 Annual Report (EMPS London)

46 Drinking-Water System Number: Drinking-Water System Name: Elgin Middlesex Pumping Station City of London Distribution System Drinking-Water System Owner: City of London Drinking-Water System Category: Large Municipal Residential Period being reported: January 1, 2018 through December 31, 2018 Complete if your Category is Large Municipal Residential or Small Municipal Residential Does your Drinking-Water System serve more than 10,000 people? Yes [X] [ ] Is your annual report available to the public at no charge on a web site on the Internet? Yes [X] [ ] Location where Summary Report required under O. Reg. 170/03 Schedule 22 will be available for inspection. City of London 300 Dufferin Ave London, ON N6B 1Z2 Elgin Area Primary Water Supply System Treatment Plant Dexter Line, Union, ON Complete for all other Categories. Number of Designated Facilities served: N/A Did you provide a copy of your annual report to all Designated Facilities you serve? Yes [ ] [ ] Number of Interested Authorities you report to: N/A Did you provide a copy of your annual report to all Interested Authorities you report to for each Designated Facility? Yes [ ] [ ] List all Drinking-Water Systems (if any), which receive all of their drinking water from your system: Systems that receive their drinking water directly from the London EMPS: Drinking Water System Name Drinking Water System Number City of London Distribution System Systems that receive their drinking water indirectly from the London EMPS: Drinking Water System Name Drinking Water System Number Municipality of Central Elgin (PIBS 4435e01) February 2019 Page 1 of 4

47 Did you provide a copy of your annual report to all Drinking-Water System owners that are connected to you and to whom you provide all of its drinking water? Yes [X] [ ] Indicate how you notified system users that your annual report is available, and is free of charge. [X] Public access/notice via the web [X] Public access/notice via Government Office [ ] Public access/notice via a newspaper [X] Public access/notice via Public Request [ ] Public access/notice via a Public Library [ ] Public access/notice via other method Describe your Drinking-Water System The Elgin Middlesex Pumping Station (EMPS) receives water from the Elgin Area Primary Water Supply System, which is located to the east of Port Stanley. Through various secondary water supply systems, the EMPS serves the Cities of London, St. Thomas, Town of Aylmer, Municipalities of Central Elgin, Malahide and Southwold. The EMPS is a shared facility encompassing a twin celled reservoir with a total capacity of 54,600m 3. Booster pumps are dedicated to directing water to the City of London, St. Thomas Secondary and/or Aylmer Area Secondary Water Supply Systems. The EMPS houses a surge facility to service the London transmission main. Three pipelines exit the EMPS: one pipeline runs rth along Highbury Avenue into the Southeast Reservoir Pumping Station (SERPS) to service the London distribution system, the second exits to the south of the EMPS property and extends West to service the St. Thomas Area Secondary Water Supply System; the third exits to the South, to Highway 3 and then runs in an Easterly direction to service the municipalities on the Aylmer Area Secondary Water Supply System. List all water treatment chemicals used over this reporting period re-treatment of water destined for London took place at the EMPS in Were any significant expenses incurred to? [ ] Install required equipment [X] Repair required equipment [X] Replace required equipment Please provide a brief description and a breakdown of monetary expenses incurred Surge tank relief valves replacement LED lighting upgrades Pump #4 discharge isolation butterfly valve replacement Installed arc flash labels on MCC panels Surge tank level columns replacement Pump #6 switchgear removal Unit heaters in surge building replacement (PIBS 4435e01) February 2019 Page 2 of 4

48 Sump pump system piping and check valves replacement Air compressor system repairs Pump #6 pump, motor and valve rebuilds tices submitted in accordance with subsection 18(1) of the Safe Drinking-Water Act or section 16-4 of Schedule 16 of O.Reg.170/03 and reported to Spills Action Centre Incident Unit of Parameter Result Corrective Action Date Measure N/A N/A N/A N/A N/A N/A Corrective Action Date Microbiological testing done under the Schedule 10, 11 or 12 of Regulation 170/03, during this reporting period. Number of Samples Range of E.Coli Results (CFU/100 ml) (min #)-(max #) Range of Total Coliform Results (CFU/100 ml) (min #)-(max #) Number of Heterotrophic Plate Count (HPC) Samples Range of HPC Results (CFU/1 ml) (min #)-(max #) Distribution 53 (0) (0) (0) (0) 53 (<10)-(10) Operational testing done under Schedule 7, 8 or 9 of Regulation 170/03 during the period covered by this Annual Report. Parameter Number of Grab Samples (Continuous Monitoring) Min Max Avg Free Chlorine Residual (mg/l) Summary of Organic parameters sampled during this reporting period or the most recent sample results Parameter THM (NOTE: result value is based on one sample) Sample Date January 16, 2018 April 5, 2018 July 24, 2018 October 16, 2018 Result Value Unit of Measure g/l g/l g/l g/l Exceedance NO THM Running Annual Average (RAA) g/l NO HAA (NOTE: result value is based on one sample) January 16, 2018 April 5, 2018 July 24, 2018 October 16, 2018 ND g/l g/l g/l g/l NO (PIBS 4435e01) February 2019 Page 3 of 4

49 HAA Running Annual Average (RAA) g/l NO ND = n-detect (PIBS 4435e01) February 2019 Page 4 of 4