Grimsby Water Treatment Plant - 2022 Annual Water Quality Report
This annual water quality report summarizes the quality of drinking water from the Grimsby Water Treatment Plant, drinking water system number 220002066, from Jan. 1 to Dec. 31, 2022.
This report satisfies the requirements of Ontario Regulation 170/03 - Drinking Water Systems.
Description of drinking water system
A conventional surface water treatment plant incorporates the following steps in its purification process:
- Zebra mussel control
- Travelling screens
- Coagulation
- Flocculation
- Sedimentation
- Filtration
- Disinfection
The plant has a rated daily flow capacity of 44,000 m3/day. Primary disinfection is achieved with sodium hypochlorite.
The Grimsby Water Treatment Plant supplies water to the towns of Grimsby (260001851), Lincoln (260004319), and West Lincoln (260002876) in Niagara. The Grimsby Water Treatment Plant is located on Lot 115, Concession1, in North Grimsby.
The water treatment chemicals used over this reporting period are:
- Sodium Hypochlorite
- Aluminum Sulphate
Monetary expenses incurred
To ensure safe and efficient operations, the following major repairs or upgrade projects took place:
Water treatment plant infrastructure
- Plant HVAC improvements (construction) - $10,000
- Plant laneway improvements and valve replacement (pre-construction) - $218,000
System infrastructure
- CNR watermain (construction) - $191,000
- System storage, new reservoir (construction) - $7,913,500
Summary of adverse water quality incidents
The following table summarizes the notices of adverse water quality incidents submitted in accordance with the Safe Drinking Water Act. Adverse water quality incidents are reported to the Spills Action Centre and the Medical Officer of Health.
Where there have been no adverse water quality incidents for the reporting period, the table will show "NIL".
| Incident date | Location | Adverse condition | Corrective action | Notice of issue resolution |
|---|---|---|---|---|
| Feb. 24 | Treated | Sodium exceedance |
Courtesy notification to Public Health Formal adverse notification is only required if a previous report was not made within the last 57 months. Last adverse notification: June 1, 2017 |
Not applicable |
| Sept. 29 | Distribution | Total coliform exceedance |
Resamples collected and results within acceptable limits |
Oct. 4, 2021 |
Water quality test results
Reported results that are shown with "ND" (non-detect) instead of a numerical value indicates that the sample result is below the lowest possible detection limit for the parameter.
Microbiological testing
Microbiological testing carried out under Schedule 10 of Ontario Regulation 170/03 - Drinking Water systems, during this reporting period.
| Location | Number of samples | Range of E.Coli or Fecal results (minimum number) -(maximum number) | Range of total Coliform results (minimum number) -(maximum number) | Prescribed standard* | Unit of measure |
|---|---|---|---|---|---|
| Raw | 52 | 0 - 3 | 0 - 290 | Not applicable | CFU/100ml |
| Treated | 53 | 0 | 0 | Not detectable | CFU/100ml |
| Distribution | 208 | 0 | 0 - 1 | Not detectable | CFU/100ml |
*Prescribed standards are copied from Ontario Regulation 169/03 - Ontario Drinking Water Quality Standards.
Heterotrophic plate count testing
Heterotrophic plate count testing (HPC) is conducted on some treated and distribution system samples. The heterotrophic plate count test is used as a tool to monitor overall quality, but the results are not indicators of water safety. There is no prescribed standard for heterotrophic plate count.
| Location | Number of samples | Range of HPC results | Unit of measure |
|---|---|---|---|
| Treated | 53 | 0 - 2 | CFU/mL |
| Distribution | 208 | 0 - 9 | CFU/mL |
Operational testing
Operational testing carried out under Schedule 7 of Ontario Regulation 170/03 - Drinking Water Systems, during this reporting period. An analyzer continuously monitors the water treatment process and records results on a predetermined frequency. Where continuous monitors are used, 8760 is reflected as the number of samples.
| Parameter | Number of samples | Range of results (minimum number) - (maximum number) | Unit of measure |
|---|---|---|---|
| Filter turbidity | 8760 | 0.015 - 1.16 | NTU* |
| Treated chlorine | 8760 | 0.87 - 1.29 | mg/L |
*NTU (nephelometric turbidity units) is a unit that measures the lack of water clarity.
Additional testing
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 | Location: parameter | Date sampled | Result value or range (minimum number) - (maximum number) | Requirement | Unit of measure |
|---|---|---|---|---|---|
Municipal Drinking Water Licence |
Environmental Discharge: Free Chlorine Residual | Weekly (January to December) | 0 | < 0.02 | mg/L |
Municipal Drinking Water Licence |
Environmental Discharge: Total Suspended Solids | Monthly (January to December) |
8 | 25 (annual average) | mg/L |
| Municipal Drinking Water Licence Issue 8 Aug. 13, 2021 |
Raw: Microcystin | Weekly (June to October) | ND - 0.00019 | 0.0015* | mg/L |
| Municipal Drinking Water Licence Issue 8 Aug. 13, 2021 |
Treated: Microcystin | Weekly (June to October) | ND - 0.00017 | 0.0015* | mg/L |
Inorganic testing
Inorganic parameter testing carried out under Schedule 13 of Ontario Regulation 170/03 - Drinking Water Systems, during this reporting period. Inorganic substances include heavy metals and dissolved minerals that may be present in treated drinking water.
| Parameter | Number of samples | Last sample date | Range of results (minimum number)-(maximum number) | Prescribed standard* | Unit of measure | Exceedance |
|---|---|---|---|---|---|---|
| Antimony | 4 | Nov 17 | ND |
0.006 | mg/L | No |
| Arsenic | 4 | Nov 17 | ND - 0.001 | 0.01 | mg/L | No |
| Barium | 4 | Nov 17 | 0.018 - 0.021 | 1.0 | mg/L | No |
| Boron | 4 | Nov 17 | 0.017 - 0.024 | 5.0 | mg/L | No |
| Cadmium | 4 | Nov 17 | ND | 0.005 | mg/L | No |
| Chromium | 4 | Nov 17 | ND - 0.001 | 0.05 | mg/L | No |
| Fluoride | 12 | Dec. 8 | ND - 0.09 | 1.5 | mg/L | No |
| Mercury | 4 | Nov 17 | ND | 0.001 | mg/L | No |
| Nitrate | 12 | Dec. 8 | 0.25 - 0.44 | 1.0 | mg/L | No |
| Nitrite | 12 | Dec. 8 | ND | 10.0 | mg/L | No |
| Selenium | 4 | Nov 17 | ND - 0.0013 | 0.05 | mg/L | No |
| Sodium | 8 | Nov 17 | 14.1 - 22 | 20 | mg/L | No |
| Uranium | 4 | Nov 17 | ND | 0.02 | mg/L | No |
*Prescribed standards are copied from Ontario Regulation 169/03 - Ontario Drinking Water Quality Standards. The prescribed standard for sodium is copied from Ontario Regulation 170/03 - Drinking Water Systems.
Lead testing
Lead testing carried out under Schedule 15.1 of Ontario Regulation 170/03 - Drinking Water Systems, during this reporting period.
| Location type | Number of samples | Last sample date | Range of lead results (min to max) | Prescribed standard | Unit of measure | Exceedance |
|---|---|---|---|---|---|---|
| Treated | 4 | Nov 17 | ND | 0.010 | mg/L | No |
| Distribution | 4 | Nov 17 | ND | 0.010 | mg/L | No |
Organics testing
Organic parameter testing carried out under Schedule 13 of Ontario Regulation 170/03 - Drinking Water Systems, during this reporting period. Trace organic test parameters include: volatile organic substances, pesticides, solvents, dioxins, PCB's, and disinfection by-products.
| Parameter | Number of samples | Last sample date | Range of results (minimum number)-(maximum number) | Prescribed standard* | Unit of measure | Exceedance |
|---|---|---|---|---|---|---|
| 1,1-Dichloroethylene (vinylidene chloride) | 4 | Nov. 17 | ND | 0.014 | mg/L | No |
| 1,2-Dichlorobenzene | 4 | Nov. 17 | ND | 0.2 | mg/L | No |
| 1,2-Dichloroethane | 4 | Nov. 17 | ND | 0.005 | mg/L | No |
| 1,4-Dichlorobenzene | 4 | Nov. 17 | ND | 0.005 | mg/L | No |
| 2,3,4,6-Tetrachlorophenol | 4 | Nov. 17 | ND | 0.1 | mg/L | No |
| 2,4,6-Trichlorophenol | 4 | Nov. 17 | ND | 0.005 | mg/L | No |
| 2,4-Dichlorophenoxy acetic acid (2,4-D) | 4 | Nov. 17 | ND | 0.1 | mg/L | No |
| 2-4 Dichlorophenol | 4 | Nov. 17 | ND | 0.9 | mg/L | No |
| 2-Methyl-4-chlorophenoxyacetic acid (MCPA) | 4 | Nov. 17 | ND | 0.1 | mg/L | No |
| Alachlor | 4 | Nov. 17 | ND | 0.005 | mg/L | No |
| Atrazine + N-dealkylated metabolites | 4 | Nov. 17 | ND | 0.005 | mg/L | No |
| Azinphos-methyl | 4 | Nov. 17 | ND | 0.02 | mg/L | No |
| Benzene | 4 | Nov. 17 | ND | 0.001 | mg/L | No |
| Benzo(a)pyrene | 4 | Nov. 17 | ND | 0.00001 | mg/L | No |
| Bromoxynil | 4 | Nov. 17 | ND | 0.005 | mg/L | No |
| Carbaryl | 4 | Nov. 17 | ND | 0.09 | mg/L | No |
| Carbofuran | 4 | Nov. 17 | ND | 0.09 | mg/L | No |
| Carbon tetrachloride | 4 | Nov. 17 | ND | 0.002 | mg/L | No |
| Chlorpyrifos | 4 | Nov. 17 | ND | 0.09 | mg/L | No |
| Diazinon | 4 | Nov. 17 | ND | 0.02 | mg/L | No |
| Dicamba | 4 | Nov. 17 | ND | 0.12 | mg/L | No |
| Dichloromethane | 4 | Nov. 17 | ND | 0.05 | mg/L | No |
| Diclofop-methyl | 4 | Nov. 17 | ND | 0.009 | mg/L | No |
| Dimethoate | 4 | Nov. 17 | ND | 0.02 | mg/L | No |
| Diquat | 4 | Nov. 17 | ND | 0.07 | mg/L | No |
| Diuron | 4 | Nov. 17 | ND | 0.15 | mg/L | No |
| Glyphosate | 4 | Nov. 17 | ND | 0.28 | mg/L | No |
| HAA - Distribution (latest running annual average) | 12 | Dec. 8 | 0.0016 | 0.080 (running annual average) | mg/L | No |
| Malathion | 4 | Nov. 17 | ND | 0.19 | mg/L | No |
| Metolachlor | 4 | Nov. 17 | ND | 0.05 | mg/L | No |
| Metribuzin | 4 | Nov. 17 | ND | 0.08 | mg/L | No |
| Monochlorobenzene | 4 | Nov. 17 | ND | 0.08 | mg/L | No |
| Paraquat | 4 | Nov. 17 | ND | 0.01 | mg/L | No |
| Pentachlorophenol | 4 | Nov. 17 | ND | 0.06 | mg/L | No |
| Phorate | 4 | Nov. 17 | ND | 0.002 | mg/L | No |
| Picloram | 4 | Nov. 17 | ND | 0.19 | mg/L | No |
| Polychlorinated Biphenyls (PCB) | 4 | Nov. 17 | ND | 0.003 | mg/L | No |
| Prometryne | 4 | Nov. 17 | ND | 0.001 | mg/L | No |
| Simazine | 4 | Nov. 17 | ND | 0.01 | mg/L | No |
| Terbufos | 4 | Nov. 17 | ND | 0.001 | mg/L | No |
| Tetrachloroethylene | 4 | Nov. 17 | ND | 0.01 | mg/L | No |
| THM - Distribution (latest running annual average) | 12 | Dec. 8 | 0.023 | 0.100 (running annual average) |
mg/L | No |
| Triallate | 4 | Nov. 17 | ND | 0.23 | mg/L | No |
| Trichloroethylene | 4 | Nov. 17 | ND | 0.005 | mg/L | No |
| Trifluralin | 4 | Nov. 17 | ND | 0.045 | mg/L | No |
| Vinyl Chloride | 4 | Nov. 17 | ND | 0.001 | mg/L | No |
*Prescribed standards are copied from Ontario Regulation 169/03 - Ontario Drinking Water Quality Standards.
Parameters exceeding prescribed half-standard
Sodium - Prescribed standard is <=20
| Result value or range (minimum number)-(maximum number) | Date of sample |
|---|---|
| 14.1 - 22 mg/L | Jan. 6 |
*Prescribed standards are copied from Ontario Regulation 169/03 - Ontario Drinking Water Quality Standards. The prescribed standard for sodium is copied from Ontario Regulation 170/03 - Drinking Water Systems.
© Niagara Region - 1815 Sir Isaac Brock Way, Thorold, ON, L2V 4T7 - Phone: 905-980-6000, Toll-free: 1-800-263-7215
