ANNUAL REPORT ONTARIO REGULATION 170/03 SECTION 11 LISLE DRINKING WATER SYSTEM FOR THE PERIOD: JANUARY 1, 2017 DECEMBER 31, 2017

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1 ANNUAL REPORT Ontario Clean Water Agency Minesing Well Supply System ONTARIO REGULATION 170/03 SECTION 11 LISLE DRINKING WATER SYSTEM FOR THE PERIOD: JANUARY 1, 2017 DECEMBER 31, 2017 Prepared for the Corporation of the Township of Adjala-Tosorontio by the Ontario Clean Water Agency

2 Drinking-Water System Number: Drinking-Water System Name: Lisle Drinking Water System Drinking-Water System Owner: The Corporation of the Township of Adjala-Tosorontio Drinking-Water System Category: Small Municipal Residential Period being reported: January 1, 2017 to December 31, 2017 Does your Drinking-Water System serve more than 10,000 people? No 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. Summary Report is available for inspection at the Township of Adjala-Tosorontio Municipal Office at 7855 Sideroad 30, Alliston, ON or on the following website: 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 Not applicable Not applicable 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? Not Applicable 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 Drinking Water Systems Regulations (PIBS 4435e01) Page 1 of 5

3 Description of Drinking-Water System: The Lisle water system is classified as a Small Municipal Residential water system with 79 services. Water is supplied via two (2) municipal wells and one (1) pumphouse. Inspections and maintenance duties are conducted by Ontario Clean Water Agency staff on a regular basis to maintain compliance with Ontario Regulation 170/03 to ensure that Lisle s water supply is safe to drink. List of water treatment chemicals used during the reporting period: Sodium Hypochlorite 12% Solution NSF, Disinfection Significant expenses incurred to: [X] Install required equipment [X] Purchase required equipment [X] Repair required equipment [X] Replace required equipment Description of significant expenses incurred in 2017: 1. Drinking Water Quality Management Standard (DWQMS) audit of OCWA Quality & Environmental Management System (QEMS). 2. Annual calibrations of continuous analyzers, backflow preventers, flow meters, etc. 3. Laboratory sample bottles and analysis. 4. Repaired/serviced singer flow control valve. 5. Installed and replaced new well probes and loop isolators (x2). 6. Purchased and installed a Red Lion data logger screen. 7. Installed new pre-chlorine analyzer. 8. Replaced generator fluid. 9. Repaired chlorine analyzer. 10. Repaired plugged floor drain. 11. Purchased chlorine pump replacement parts (spare parts and injectors). 12. Replaced unit heater. 13. Purchased and installed piping and distribution parts for hydrant and curb stop repairs. 14. Purchased chemical tubing. 15. Purchased and installed ports for chlorine injection points. 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: Incident Date (yyyy/mm/dd) Result Unit of Measure Not Applicable Corrective Action Corrective Action Date (yyyy/mm/dd) Table 1: Microbiological testing done under the Schedule 11 of Regulation 170/03 during this reporting period. Location Number of Range of E. Coli or Fecal Results Range of Total Coliform Results Number of HPC Range of HPC Samples Samples Min Max Min Max Samples Min Max Raw - RW N/A N/A N/A Raw - RW N/A N/A N/A Distribution - DW Drinking Water Systems Regulations (PIBS 4435e01) Page 2 of 5

4 Table 2: Operational testing done under Schedule 7 of Regulation 170/03 during the period covered by this Annual Report. Number of Range of Results Location & Test Samples Minimum Maximum Turbidity, Raw RW1 (Grab) [NTU] Turbidity, Raw RW2 (Grab) [NTU] Free Chlorine Residual, Treated (Continuous) [mg/l] ^ 5.01 Free Chlorine Residual, Treated (Grab) [mg/l] Total Chlorine Residual, Treated (Grab) [mg/l] Free Chlorine Residual, Distribution (Grab) [mg/l] Note: the number of samples used for continuous monitoring units is ^ The minimum treated free chlorine residual of 0.23 mg/l did not result in an Adverse Observation because adequate CT was achieved. Table 3: Summary of additional testing and sampling carried out in accordance with the requirement of an approval, order or other legal instrument. Date of Legal Instrument Issued Date Sampled Result Unit of Measure Organic Nitrogen as stipulated under Schedule C Section 4.1 in MDWL was removed by the MOECC Approvals and Licensing Section on August 26, 2016 Table 4: Summary of Inorganic parameters tested during this reporting period or the most recent sample results Maximum Number of Sample Date Sample Allowable Exceedances (yyyy/mm/dd) Result Concentration (MAC) MAC ½ MAC Antimony: Sb 2013/01/02 < No No Arsenic: As 2013/01/ No No Barium: Ba 2013/01/ No No Boron: B 2013/01/ No No Cadmium: Cd 2013/01/ No No Chromium: Cr 2013/01/02 < No No Mercury: Hg 2013/01/02 < No No Selenium: Se 2013/01/02 < No No Uranium: U 2013/01/ No No Fluoride: F (mg/l) - TW 2017/01/ No No Nitrite (mg/l) - TW 2017/01/11 <MDL No No Nitrite (mg/l) - TW 2017/04/03 <MDL No No Nitrite (mg/l) - TW 2017/07/11 <MDL No No Nitrite (mg/l) - TW 2017/10/03 <MDL No No Nitrate (mg/l) - TW 2017/01/ No No Nitrate (mg/l) - TW 2017/04/03 <MDL No No Nitrate (mg/l) - TW 2017/07/11 <MDL No No Nitrate (mg/l) - TW 2017/10/03 <MDL No No Sodium: Na (mg/l) - TW 2017/01/ * No No Note: MDL = Minimum Detection Limit Drinking Water Systems Regulations (PIBS 4435e01) Page 3 of 5

5 *There is no "MAC" for Sodium. The aesthetic objective for sodium in drinking water is 200 mg/l. The local Medical Officer of Health should be notified when the sodium concentration exceeds 20 mg/l so that this information may be communicated to local physicians for their use with patients on sodium restricted diets. Table 5: Summary of lead testing under Schedule 15.1 during this reporting period Range of Lead Results Number of Location Type Number of Samples Minimum Maximum Exceedances Plumbing Not Applicable - Relief from all Plumbing Requirements* Distribution Not Applicable** Note: the Alkalinity results for 2017 were 176 and 190 (mg/l as CaCO 3 ). * This system qualifies for the plumbing exemption as per O. Regulation 170/03 Schedule (9) (10). ** Distribution lead samples are taken every 36 months. The last set of distribution lead samples was taken in The next set of distribution lead samples is scheduled for Table 6: Summary of Organic parameters sampled during this reporting period or the most recent sample results Maximum Number of Sample Date Sample Allowable Exceedances (yyyy/mm/dd) Result Concentration (MAC) MAC ½ MAC Alachlor 2013/01/02 < No No Atrazine + N-dealkylated metabolites 2013/01/02 < No No Azinphos-methyl 2013/01/02 < No No Benzene 2013/01/02 < No No Benzo(a)pyrene 2013/01/02 < No No Bromoxynil 2013/01/02 < No No Carbaryl 2013/01/02 < No No Carbofuran 2013/01/02 < No No Carbon Tetrachloride 2013/01/02 < No No Chlorpyrifos 2013/01/02 < No No Diazinon 2013/01/02 < No No Dicamba 2013/01/02 < No No 1,2-Dichlorobenzene 2013/01/02 < No No 1,4-Dichlorobenzene 2013/01/02 < No No 1,2-Dichloroethane 2013/01/02 < No No 1,1-Dichloroethylene 2013/01/02 < No No Dichloromethane (Methylene Chloride) 2013/01/02 < No No 2,4-Dichlorophenol 2013/01/02 < No No 2,4-Dichlorophenoxy acetic acid (2,4-D) 2013/01/02 < No No Diclofop-methyl 2013/01/02 < No No Dimethoate 2013/01/02 < No No Diquat 2013/01/02 < No No Diuron 2013/01/02 < No No Glyphosate 2013/01/02 < No No Drinking Water Systems Regulations (PIBS 4435e01) Page 4 of 5

6 Sample Date (yyyy/mm/dd) Sample Result Maximum Allowable Concentration (MAC) Number of Exceedances MAC ½ MAC Malathion 2013/01/02 < No No Metolachlor 2013/01/02 < No No Metribuzin 2013/01/02 < No No Monochlorobenzene (Chlorobenzene) 2013/01/02 < No No Paraquat 2013/01/02 < No No PCB 2013/01/02 < No No Pentachlorophenol 2013/01/02 < No No Phorate 2013/01/02 < No No Picloram 2013/01/02 < No No Prometryne 2013/01/02 < No No Simazine 2013/01/02 < No No Terbufos 2013/01/02 < No No Tetrachloroethylene 2013/01/02 < No No 2,3,4,6-Tetrachlorophenol 2013/01/02 < No No Triallate 2013/01/02 < No No Trichloroethylene 2013/01/02 < No No 2,4,6-Trichlorophenol 2013/01/02 < No No Trifluralin 2013/01/02 < No No Vinyl Chloride 2013/01/02 < No No Trihalomethane: Total Annual Average 4 Quarters of No No (µg/l) - DW 2017 Haloacetic Acid: Total Annual Average 4 Quarters of N/A N/A (µg/l) - DW 2017 (in 2020) Table 7: List of Inorganic or Organic parameter(s) that exceeded half the standard prescribed in Schedule 2 of Ontario Drinking Water Quality Standards. Result Value Unit of Measure Date of Sample Not Applicable Note: this table highlights the parameters with a Yes in the ½ MAC columns of Table 4 and Table 6. Drinking Water Systems Regulations (PIBS 4435e01) Page 5 of 5