2012 ANNUAL DRINKING WATER SYSTEM SUMMARY REPORT Ingersoll Water System

Transcription

1 2012 ANNUAL DRINKING WATER SYSTEM SUMMARY REPORT Ingersoll Water System 1. GENERAL INFORMATION This report summarizes test results and operating conditions for municipal drinking water systems in Oxford County. A summary of the water testing results and any adverse conditions and the resolution is available on the internet by the end of February each year at A copy of this report may also be requested from the Public Works Department. All efforts have been made to ensure the information presented in this report is as accurate as is possible. If you have any questions or comments concerning the report please contact the County of Oxford at the address and phone number listed below or by at publicworks@oxfordcounty.ca. Drinking Water System: Ingersoll Water System Drinking Water System Number: Drinking Water System Owner & Contact Information: Oxford County Public Works Department Water Services P.O. Box Reeve Street Woodstock, ON, N4S 7Y3 Telephone: Toll Free: Reporting Period: January 1, 2012 December 31, System Description The Ingersoll Water System is a Large Municipal Water system as defined by Regulation 170/03 and serves a population of approximately 13,100. There are seven groundwater wells and Water Treatment Facilities (WTF) serving the Ingersoll system as follows: Merritt Street WTF Well 2 Hamilton Road WTF Well 3 Canterbury Street WTF Well 5 West Street WTF Well 7 (Not operational in 2012) Dunn s Road WTF Well 8 Thompson Road WTF Well 10 Wallace Line WTF Well 11 (Not operational in 2012) Due to the elevated levels of naturally occurring hydrogen sulphide, all of the WTF s have hydrogen sulphide removal equipment (except Wallace Line) consisting of an oxidation and filtration process. The filters also improve the water quality by reducing other parameters such as turbidity and iron. Each WTF has an underground reservoir, automated chlorine injection system, monitoring and alarm equipment, and supplies water directly to the distribution system. In 2012, approximately 272 m 3 of sodium hypochlorite (liquid chlorine) and 544 kg of chlorine gas were used in the water treatment process. These chemicals are certified to meet standards set by the Standards Council of Canada or American National Standards Institute.

2 Storage capacity is provided by a 2,840 m 3 water tower and a 3,290 m 3 reservoir at the Merritt St WTF. Standby generators are located at Merritt St, Thompson Rd and Dunn s Rd WTF s to provide electrical power to these facilities during power outages. The system is maintained by licensed water system operators, who operate the treatment and monitoring equipment and collect samples as specified by the Regulation. Microbiological and chemical samples are analyzed at certified laboratories. A SCADA (Supervisory Control and Data Acquisition) system controls the normal operation of the facilities and collects operational data Major Expenses The 2012 forecasted operating and maintenance expenditures for the Ingersoll water system are $1,730,000. Also, approximately $850,000 was spent on the following capital projects: Improvements to the West St and Dunn s Rd WTFs Rehabilitation of 1.7 km of cast iron watermain 2. MICROBIOLOGICAL TESTING 2.1. E. coli and Total Coliforms Bacteriological tests for E. coli and total coliforms are required weekly on the raw and treated water at each facility and in the distribution system. Extra samples are taken after major repairs or maintenance work. Any E. coli or total coliform results above 0 in treated water must be reported to the Ministry of Environment (MOE) and Medical Officer of Health. Resamples and any other required actions are taken as quickly as possible. The results from the 2012 sampling program are shown in the table below. There were no adverse test results from 562 treated water samples in this reporting period. Number of Samples Range of E. coli Results Min - Max = 0 Range of Total Coliform Results Min - Max = 0 Raw Treated Distribution Heterotrophic Plate Count (HPC) HPC analyses are required from the treated and distribution water. The tests are required weekly for treated water and for 25% of the distribution system s bacteriological samples. The HPC should be less than 500 colonies per 1 ml. Results over 500 colonies per 1 ml may indicate a change in water quality but it is not considered an indictor of unsafe water results are shown in the table below. Number of Samples Range of HPC Min - Max Treated Distribution CHEMICAL TESTING The Safe Drinking Water Act requires periodic testing of 70 chemical parameters. The latest results for all parameters are provided in Appendix A. The sampling frequency varies for different types and sizes of water systems. If the concentration of a parameter is above half of the Maximum Allowable Concentration () under the Ontario Drinking Water Quality Standards, an increased testing frequency of once every three months is required by the Regulation. Where concerns regarding a parameter exist, the Ministry of

3 the Environment can also require additional sampling be undertaken. The Ingersoll Water System requires additional testing for Sulfides with the results summarized in the table below. Type of legal instrument: MOE Municipal Drinking Water License January 7, 2013 Date Sampled Result Raw Water Result Treated Water Aesthetic Objective Sulfides -Merritt St Nov 30, ND Sulfides -Hamilton Rd Nov 30, ND Sulfides -Canterbury St Nov 30, 2011 ND Sulfides -Dunn s Rd Nov 30, ND Sulfides -Thompson Rd Nov 30, ND Information on the health effects and allowable limits of components in drinking water may be found on the MOE web page through the link provided in Appendix A. Additional information on common chemical parameters specific to the Ingersoll system is provided below Sodium Sodium levels in drinking water are tested once every five years. The aesthetic objective is 200 mg/l meaning at levels less than this, sodium will not impair the taste of the water. When sodium levels are above 20 mg/l the MOE and Medical Officer of Health are notified. The Department of Public Health and Emergency Services maintains an information page on sodium in drinking water at in order to help people on sodium restricted diets control their sodium intake. The average sodium level in the water is 61 mg/l and individual test results for each treatment facility are provided in Appendix A Fluoride Fluoride levels are tested once every five years and levels above1.5 mg/l must be reported to the MOE and Medical Officer of Health. Levels under 2.4 mg/l are considered safe for consumption, however at levels between 1.5 and 2.4 mg/l fluoride may cause staining or pitting of teeth in children less than 6 years old. Further information on fluoride can be found on the County s Public Health web page at Oxford County does not add fluoride to the water at any of its drinking water systems however the Ingersoll system has naturally occurring fluoride levels averaging 1.53 mg/l. The individual test results for each treatment facility are provided in Appendix A Hardness Hardness is an aesthetic parameter that may affect the appearance of the water but is not related to health. Well water commonly has high levels of hardness and other minerals from being in contact with underground rock formations. Many households have water softeners to help reduce white calcium deposits and improve the efficiency of soaps. This information is included here to help set the water softener at the level recommended by the manufacturer. The average hardness in the system is 338 mg/l (equivalent to 24 grains/gallon).

4 4. OPERATIONAL MONITORING 4.1. Chlorine Residual Free chlorine levels of the treated water are monitored continuously at the discharge point of each Water Treatment Facility. In the distribution system, free chlorine is monitored continuously at the water tower. As a target, the free chlorine residual within the distribution system should be above 0.20 mg/l. A free chlorine level lower than 0.05 mg/l must be reported and corrective action taken. A summary of the chlorine residual readings is provided in the table below Turbidity Turbidity of treated water is continuously monitored at each treatment facility. A change in turbidity can indicate an operational problem. The turbidity of untreated water from each well is checked weekly. Turbidity is measured in nephelometric turbidity units (NTU). Under Regulation 170/03 turbidity in groundwater is not reportable however turbidity should be < 1 NTU at the treatment plant and < 5 NTU in the distribution system. A summary of the monitoring results for 2012 is below. Monitoring Frequency Range of Results Min Max and Average Chlorine Residual in Distribution Continuous ( ) 0.98 Chlorine -Merritt St. WTF Continuous ( ) 1.25 Chlorine -Hamilton Rd. WTF Continuous ( ) 1.38 Chlorine -Canterbury St. WTF Continuous ( ) 1.58 Chlorine -Dunn s Rd. WTF Continuous ( ) 1.38 Chlorine -Thompson Rd. WTF Continuous ( ) 1.51 Turbidity -Merritt St. WTF (NTU) Continuous ( ) 0.73 Turbidity -Hamilton Rd. WTF (NTU) Continuous ( ) 0.08 Turbidity -Canterbury St. WTF (NTU) Continuous ( ) 0.19 Turbidity -Dunn s Rd. WTF (NTU) Continuous ( ) 1.04 Turbidity -Thompson Rd. WTF (NTU) Continuous ( ) Distribution and Supply Well Flow Rates Continuous monitoring of flow rates from supply wells into the treatment system and the flow rates into the distribution system are required by Regulation 170/03. The Municipal Drinking Water License and Permit to Take Water limit the amount of water that can be utilized over a given time period. A summary of the 2012 flows is provided in Appendix B. 5. NON-COMPLIANCE FINDINGS AND ADVERSE RESULTS This section documents any known incidents of non-compliance or adverse results and the associated corrective actions taken to resolve the issue. Non-compliance issues are typically identified by either the Operating Authority or the Ministry of the Environment Drinking Water Inspectors. The issues and associated required actions are documented by the Inspectors in the system s Annual Inspection Report. All non-compliance issues are investigated, corrective actions taken and documented using the County s Drinking Water Quality Management System (DWQMS) procedures.

5 5.1. Non-Compliance Findings The annual Ministry of the Environment Drinking Water Inspection took place in February 2013 and the Inspection Report was not available at the time this report was prepared. The Inspection Rating for the 2011 inspection was 91%. Issues identified during that inspection were successfully resolved Adverse Results Any adverse results from bacteriological, chemical samples or observations of operational conditions that indicate adverse water quality are reported as required and corrective actions taken. Below is a summary of the adverse/reportable occurrences for 2012 along with the corresponding resolution. Incident / Date Corrective Action Resolution / Date Lead exceedence in distribution sample March 2, 2012 Low chlorine in distribution sample April 24, 2012 Report and resample Report, flush and retest Resample result acceptable March 15, 2012 Acceptable chlorine residual restored April 24, 2012

6 APPENDIX A: SUMMARY OF CHEMICAL RESULTS UNDERSTANDING CHEMICAL TEST RESULTS The following tables summarize the laboratory results of the chemical testing Oxford County is required to complete. Different types of parameters are required to be tested for at different frequencies as noted below. Explanations on the health impacts of these parameters can be found at the MOE web site link document # 4449e01 titled Technical Support Document for Ontario Drinking Water Standards, Objectives and Guidelines. Results are shown as concentrations with units of either milligrams per litre or micrograms per litre. 1 mg/l is equal to 1000 ug/l. The Maximum Acceptable Concentration () is the highest amount of a parameter that is acceptable in Municipal drinking water and can be found in the MOE Drinking Water Standards. The Method Detection Limit () is the lowest amount to which the laboratory can confidently measure. A result of ND stands for Not Detected and means that the concentration of the chemical is lower than the laboratory s equipment is capable of measuring. Nitrite and nitrate samples are required every 3 months in normal operation. Result Range Average & Location Min Max Result Nitrite Merritt St ND Hamilton Rd ND ND Canterbury St ND Dunn s Rd ND Thompson Rd ND Nitrate Merritt St ND ND Hamilton Rd ND ND Canterbury St ND ND Dunn s Rd ND Thompson Rd ND ND A Trihalomethane (THM) sample is required every 3 months from the distribution system. THM is a byproduct of the disinfection process. Average Result Year Value Trihalomethane The following Tables summarize the most recent test results for Sodium and Fluoride. Testing and reporting any adverse results is required every 5 years. & Location Sample Date Sodium Merritt St Jul 6, * 0.01 Hamilton Rd Jun 2, * 0.01 Canterbury St Feb 3, * 0.01 West St Nov 14, * 0.01 Dunn s Rd Jul 6, * 0.01 Thompson Rd Aug 24, * 0.01 *Sodium levels between mg/l must be reported every 5 years.

7 & Location Sample Date Fluoride Merritt St Jul 6, ** 0.06 Hamilton Rd Jun 2, ** 0.06 Canterbury St Feb 3, ** 0.06 West St Nov 14, ** 0.06 Dunn s Rd Jul 6, ** 0.06 Thompson Rd Aug 24, ** 0.06 **Natural levels of fluoride between mg/l must be reported every 5 years. The following Tables summarize the most recent test results for the Inorganic parameters in Schedule 23. Testing is required every 3 years for secure groundwater wells. Well 2 June 1, 2010 Well 3 April 30, 2012 Well 5 June 1, 2010 Antimony ND 0.03 ND Arsenic ND 0.4 ND Barium Boron Cadmium ND Chromium Mercury ND ND ND Selenium ND ND ND 10 1 Uranium Well 7 May 2, 2007 Well 8 April 4, 2011 Well 10 June 1, 2010 Antimony ND ND ND Arsenic ND 0.5 ND Barium Boron Cadmium ND Chromium ND Mercury ND ND ND Selenium ND ND ND 10 1 Uranium ND The following Tables summarize the most recent test results for the Organic parameters in Schedule 24. Testing is required every 3 years for secure groundwater wells. Well 2 Apr 30, 2012 Well 3 Apr 30, 2012 Well 5 Apr 30, 2012 Alachlor ND ND ND Aldicarb ND ND ND Aldrin + Dieldrin ND ND ND Atrazine + N-dealkylated metobolites ND ND ND Azinphos-methyl ND ND ND Bendiocarb ND ND ND

8 Well 2 Apr 30, 2012 Well 3 Apr 30, 2012 Well 5 Apr 30, 2012 Benzene ND ND ND Benzo(a)pyrene ND ND ND Bromoxynil ND ND ND Carbaryl ND ND ND Carbofuran ND ND ND Carbon Tetrachloride ND ND ND Chlordane (Total) ND ND ND Chlorpyrifos ND ND ND Cyanazine ND ND ND Diazinon ND ND ND Dicamba ND ND ND ,2-Dichlorobenzene ND ND ND ,4-Dichlorobenzene ND ND ND DDT + metabolites ND ND ND ,2-Dichloroethane ND ND ND ,1-Dichloroethylene (vinylidene chloride) ND ND ND Dichloromethane ND ND ND Dichlorophenol ND ND ND ,4-Dichlorophenoxy acetic acid (2,4-D) ND ND ND Diclofop-methyl ND ND ND Dimethoate ND ND ND Dinoseb ND ND ND Diquat ND ND ND 70 1 Diuron ND ND ND Glyphosate ND* ND* ND* Heptachlor + Heptachlor Epoxide ND ND ND Lindane (Total) ND ND ND Malathion ND ND ND Methoxychlor ND ND ND Metolachlor ND ND ND Metribuzin ND ND ND Monochlorobenzene ND ND ND Paraquat ND ND ND 10 1 Parathion ND ND ND Pentachlorophenol ND ND ND Phorate ND ND ND Picloram ND ND ND Polychlorinated Biphenyls(PCB) ND ND ND Prometryne ND ND ND Simazine ND ND ND Temephos ND ND ND Terbufos ND ND ND Tetrachloroethylene ND ND ND ,3,4,6-Tetrachlorophenol ND ND ND Triallate ND ND ND Trichloroethylene ND ND ND ,4,6-Trichlorophenol ND ND ND ,4,5-Trichlorophenoxy acetic acid (2,4,5-T) ND ND ND Trifluralin ND ND ND Vinyl Chloride ND ND ND * The most recent samples for Glyphosate were taken May 22, 2012.

9 Well 7 Nov 30, 2009 Well 8 Apr 30, 2012 Well 10 Jul 30, 2012 Alachlor ND ND ND Aldicarb ND ND ND Aldrin + Dieldrin ND ND ND Atrazine + N-dealkylated metobolites ND ND ND Azinphos-methyl ND ND ND Bendiocarb ND ND ND Benzene ND ND ND Benzo(a)pyrene ND ND ND Bromoxynil ND ND ND Carbaryl ND ND ND Carbofuran ND ND ND Carbon Tetrachloride ND ND ND Chlordane (Total) ND ND ND Chlorpyrifos ND ND ND Cyanazine ND ND ND Diazinon ND ND ND Dicamba ND ND ND ,2-Dichlorobenzene ND ND ND ,4-Dichlorobenzene ND ND ND DDT + metabolites ND ND ND ,2-Dichloroethane ND ND ND ,1-Dichloroethylene (vinylidene chloride) ND ND ND Dichloromethane ND ND ND Dichlorophenol ND ND ND ,4-Dichlorophenoxy acetic acid (2,4-D) ND ND ND Diclofop-methyl ND ND ND Dimethoate ND ND ND Dinoseb ND ND ND Diquat ND ND ND 70 1 Diuron ND ND ND Glyphosate ND ND* ND Heptachlor + Heptachlor Epoxide ND ND ND Lindane (Total) ND ND ND Malathion ND ND ND Methoxychlor ND ND ND Metolachlor ND ND ND Metribuzin ND ND ND Monochlorobenzene ND ND ND Paraquat ND ND ND 10 1 Parathion ND ND ND Pentachlorophenol ND ND ND Phorate ND ND ND Picloram ND ND ND Polychlorinated Biphenyls (PCB) ND ND ND Prometryne ND ND ND Simazine ND ND ND Temephos ND ND ND Terbufos ND ND ND Tetrachloroethylene ND ND ND ,3,4,6-Tetrachlorophenol ND ND ND * The most recent sample for Glyphosate was taken May 22, 2012.

10 Well 7 Nov 30, 2009 Well 8 Apr 30, 2012 Well 10 Jul 30, 2012 Triallate ND ND ND Trichloroethylene ND ND ND ,4,6-Trichlorophenol ND ND ND ,4,5-Trichlorophenoxy acetic acid (2,4,5-T) ND ND ND Trifluralin ND ND ND Vinyl Chloride ND ND ND The following Table summarizes the 2012 results for the Lead Testing Program. Result Range Number of Acceptable Range (Min - Max) Samples Distribution Lead ug/l Distribution Alkalinity Distribution ph (no units)

11 APPENDIX B: COUNTY OF OXFORD 2012 SUMMARY INGERSOLL WATER SYSTEM DISTRIBUTION FLOWS Population Served: 13, TOTAL MONTHLY AVERAGE DAILY MAXIMUM MAXIMUM MONTH FLOW FLOW DAY FLOW FLOW RATE m3 m3 m3 L/s JANUARY 193,089 6,229 7, FEBRUARY 182,436 6,291 7, MARCH 192,662 6,215 7, APRIL 189,428 6,314 8, MAY 205,320 6,623 8, JUNE 199,562 6,652 8, JULY 189,125 6,101 7, AUGUST 195,627 6,311 7, SEPTEMBER 188,768 6,292 7, OCTOBER 193,689 6,248 7, NOVEMBER 186,682 6,223 7, DECEMBER 167,087 5,390 6, TOTAL 2,283,475 SUMMARY Drinking Water License Limit (m3/day) 26,512 Average Day Flow (m3) 6,318 Maximum Day Flow (m3) 8,587 Capacity Used 32%

12 COUNTY OF OXFORD 2012 SUMMARY WATER SYSTEM: INGERSOLL MERRITT ST. TREATMENT FACILITY 2012 TOTAL MONTHLY AVERAGE DAILY MAXIMUM MAXIMUM MONTH FLOW FLOW DAY FLOW FLOW RATE m3 m3 m3 L/s JANUARY 19, , FEBRUARY 37,463 1,292 2, MARCH 13, APRIL 18, , MAY 17, , JUNE 17, , JULY 17, , AUGUST 29, , SEPTEMBER 22, , OCTOBER 21, , NOVEMBER 14, , DECEMBER 11, , TOTAL 240,373 SUMMARY Drinking Water License Limit (m3/day) 2,946 Average Day Flow (m3) 660 Maximum Day Flow (m3) 2,560 Capacity Used 87%

13 COUNTY OF OXFORD 2012 SUMMARY WATER SYSTEM: INGERSOLL HAMILTON RD. TREATMENT FACILITY 2012 TOTAL MONTHLY AVERAGE DAILY MAXIMUM MAXIMUM MONTH FLOW FLOW DAY FLOW FLOW RATE m3 m3 m3 L/s JANUARY 41,570 1,341 2, FEBRUARY 45,015 1,552 2, MARCH 21, , APRIL 42,841 1,428 2, MAY 42,316 1,365 2, JUNE 26, , JULY 34,044 1,098 2, AUGUST 24, , SEPTEMBER 21, , OCTOBER 20, , NOVEMBER 19, , DECEMBER 19, , TOTAL 357,743 SUMMARY Drinking Water License Limit (m3/day) 3,283 Average Day Flow (m3) 1,013 Maximum Day Flow (m3) 2,130 Capacity Used 65%

14 COUNTY OF OXFORD 2012 SUMMARY WATER SYSTEM: INGERSOLL CANTERBURY ST. TREATMENT FACILITY 2012 TOTAL MONTHLY AVERAGE DAILY MAXIMUM MAXIMUM MONTH FLOW FLOW DAY FLOW FLOW RATE m3 m3 m3 L/s JANUARY 44,658 1,441 1, FEBRUARY 20, , MARCH 48,072 1,551 2, APRIL 34,224 1,141 2, MAY 40,469 1,305 2, JUNE 50,530 1,684 2, JULY 27, , AUGUST 39,450 1,273 2, SEPTEMBER 45,711 1,524 2, OCTOBER 42,835 1,382 2, NOVEMBER 47,348 1,578 2, DECEMBER 34,918 1,126 1, TOTAL 476,299 SUMMARY Drinking Water License Limit (m3/day) 3,273 Average Day Flow (m3) 1,316 Maximum Day Flow (m3) 2,327 Capacity Used 71%

15 COUNTY OF OXFORD 2012 SUMMARY WATER SYSTEM: INGERSOLL DUNN'S RD. TREATMENT FACILITY 2012 TOTAL MONTHLY AVERAGE DAILY MAXIMUM MAXIMUM MONTH FLOW FLOW DAY FLOW FLOW RATE m3 m3 m3 L/s JANUARY 14, FEBRUARY 13, , MARCH 8, APRIL 9, MAY 12, JUNE 8, JULY 10, AUGUST 10, , SEPTEMBER 10, OCTOBER 12, NOVEMBER 10, DECEMBER 6, TOTAL 128,871 SUMMARY Drinking Water License Limit (m3/day) 3,273 Average Day Flow (m3) 366 Maximum Day Flow (m3) 1,543 Capacity Used 47%

16 COUNTY OF OXFORD 2012 SUMMARY WATER SYSTEM: INGERSOLL THOMPSON RD. TREATMENT FACILITY 2012 TOTAL MONTHLY AVERAGE DAILY MAXIMUM MAXIMUM MONTH FLOW FLOW DAY FLOW FLOW RATE m3 m3 m3 L/s JANUARY 72,993 2,355 3, FEBRUARY 65,798 2,269 3, MARCH 101,668 3,280 3, APRIL 83,848 2,795 3, MAY 92,510 2,984 3, JUNE 96,974 3,232 3, JULY 100,038 3,227 3, AUGUST 92,203 2,974 3, SEPTEMBER 88,555 2,952 3, OCTOBER 96,545 3,114 3, NOVEMBER 94,406 3,147 3, DECEMBER 94,651 3,053 3, TOTAL 1,080,189 SUMMARY Drinking Water License Limit (m3/day) 4,579 Average Day Flow (m3) 2,939 Maximum Day Flow (m3) 3,970 Capacity Used 87%

17 COUNTY OF OXFORD 2012 SUMMARY INGERSOLL WATER SYSTEM - WELL FLOWS WELL 2 WELL 3 WELL 5 WELL 8 WELL 10 WELL 7 WELL MERRITT ST HAMILTON RD CANTERBURY ST DUNN'S RD THOMPSON RD WEST ST WALLACE LN MONTH m3 m3 m3 m3 m3 m3 m3 JANUARY 19,252 43,643 46,475 16,386 77, FEBRUARY 37,126 47,019 21,942 15,100 69, MARCH 13,624 23,089 50,396 9, , APRIL 19,026 44,061 36,227 11,085 88, MAY 18,152 44,096 42,867 14,424 97, JUNE 18,233 28,180 53,087 9, , JULY 17,695 35,823 29,346 12, , AUGUST 29,564 24,897 42,141 12,033 97, SEPTEMBER 22,749 22,006 48,307 12,355 92, OCTOBER 21,311 21,437 45,939 14,878 99, NOVEMBER 14,777 20,617 50,924 12,334 97, DECEMBER 12,435 20,928 37,513 7,582 99, TOTAL 243, , , ,675 1,132, SUMMARY WELL 2 WELL 3 WELL 5 WELL 8 WELL 10 WELL 7 WELL 11 Max Flow Rate (L/s) PTTW Limit (L/s) Maximum (m3/day) 2,444 2,168 2,395 1,643 4, PTTW Limit (m3/day) 2,946 3,283 3,273 3,273 4,546 4,546 4,546 Capacity Used (%) 83% 66% 73% 50% 93% 0% 0% PERMIT TO TAKE WATER RATED CAPACITY: 26,367 m3/day Minor discrepancies between flow measurements are a result of meter accuracy and/or uses of water for other treatment processes.