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2020 Water Treatment Plant treated water quality test results

Image of water treatment plant filter tanksThe new Water Treatment Plant is a state-of-the-art, modern facility designed for performance, safety, and environmental sustainability. In the plant, the water goes through several treatment processes, including dissolved air flotation, ozonation, filtration and ultraviolet light disinfection. Fluoride and orthophosphate are also added to the water. The Water Treatment Plant allows us to:

  • comply with the requirements of our Operating Licence
  • meet increasingly strict Canadian drinking water quality guidelines,
  • virtually eliminate the risk of waterborne disease,
  • reduce levels of disinfection by-products and
  • significantly improve the taste and odour of the drinking water.

Our Operating Licence requires that we maintain a minimum free chlorine residual of 0.5 milligrams per litre in water leaving the Water Treatment Plant.

Testing

We test our water at Shoal Lake, at the Water Treatment Plant raw water inlet and at the Water Treatment Plant treated water outlet once the water has passed through all of the treatment processes. The water then flows from the water treatment plant to the three regional reservoirs and pumping stations before being distributed to Winnipeg homes and businesses.

At the Water Treatment Plant treated water sampling point we test for:

  • routine water chemistry
  • taste and odour compounds
  • metals
  • disinfection by-products
  • bacteria
  • pesticides, herbicides, and PCBs

Test results are from January 1 to December 31, 2020

What is being measured How it's measured Guideline or regulation Water Treatment Plant treated average Water Treatment Plant treated range
Miscellaneous
Carbon, Dissolved Organic parts per million no guideline 3.1 2 to 4.9
Carbon, Total Organic parts per million no guideline 2.9 1.8 to 4.5
Chlorine, Free parts per million no guideline 1.29 0.97 to 2.44
Chlorine, Total parts per million no guideline 1.48 1.14 to 2.88
Chlorophyll-a parts per billion no guideline <1.0 <1.0 to <1.0
Colour, Apparent TCU no guideline 0.9 0 to 6
Colour, True TCU no more than 15 * 0.2 0 to 2
Conductivity microsiemens per centimetre no guideline 296 279 to 324
Microcystin parts per billion no more than 1.5 <0.20 <0.20 to <0.20
Odour units inoffensive* 14 8 to 20
ORP millivolts no guideline 579.9 507.6 to 629.6
Oxygen, Dissolved parts per million no guideline 12.4 8.2 to 16.9
pH units between 7.0 and 10.5 7.68 7.45 to 7.89
Plankton (algae) count cells/mL no guideline <100 <100 to <100
Solids, Total parts per million no guideline 182 156 to 222
Solids, Total Dissolved parts per million no more than 500 * 162 128 to 186
Temperature degrees Celcius no more than 15 * 9.5 1.9 to 24.7
Turbidity (clearness) NTU no more than 0.3 in 95% of measurements/month, never to exceed 1.0 0.13 0.09 to 0.25
UV Transmittance, Filtered percent transmissivity no guideline 94.7 92.5 to 97.2
UV Transmittance, Unfiltered percent transmissivity no guideline 93.5 91.2 to 96.3
Anions and Nutrients
Alkalinity, Total parts per million as calcium carbonate no guideline 68.5 61.2 to 77.1
Hardness, Total parts per million as calcium carbonate no guideline 80 72.3 to 90.5
Chloride parts per million no more than 250 * 4.1 2.4 to 5.4
Perchlorate parts per billion no guideline <0.20 <0.20 to 0.33
Sulphate parts per million no more than 500 * 67.9 59.9 to 79.1
Bacteria
Escherichia Coli MPN per 100 mL none detectable per 100 mL 0 0 to 0
Total Coliforms MPN per 100 mL none detectable per 100 mL 0 0 to 0
Heterotrophic Plate Count CFU per mL no guideline <1 <1 to 1
Disinfection By-Products
Aldehydes parts per billion no guideline 15 9 to 29.6
Haloacetic acids parts per billion no more than 80 11.7 4.1 to 19.1
Trihalomethanes parts per billion no more than 100 15.5 5.6 to 25.4
Taste and Odours
236 TCA - 2,3,6-trichloroanisole parts per trillion no guideline <0.48 <0.48 to <0.51
246 TCA - 2,4,6-trichloroanisole parts per trillion no guideline <0.48 <0.48 to <0.51
345 TCV - 3,4,5-trichloroveratrole parts per trillion no guideline <0.19 <0.19 to <1.50
Geosmin parts per trillion no guideline 2.34 <1.00 to 5.37
IBMP - 2-isobutyl-3-methoxypyrazine parts per trillion no guideline <0.19 <0.19 to <0.20
IPMP - 2-isopropyl-3-methoxypyrazine parts per trillion no guideline <0.19 <0.19 to <0.20
Dichloromethane parts per million no more than 0.05 <0.0050 <0.0050 to 0.0078
MIB - 2-methylisoborneol parts per trillion no guideline <9.60 <9.60 to 14.8
MTBE - methyl tertiary-butyl ether parts per million no more than 0.015 * <0.0005 <0.0005 to <0.0005
NDMA -N-nitrosodimethylamine parts per trillion no more than 40 3.06 1.32 to 7.39
Polychlorinated Biphenyls
Arochlor 1016 parts per billion no guideline <0.020 <0.020 to <0.020
Arochlor 1221 parts per billion no guideline <0.020 <0.020 to <0.020
Arochlor 1232 parts per billion no guideline <0.020 <0.020 to <0.020
Arochlor 1242 parts per billion no guideline <0.020 <0.020 to <0.020
Arochlor 1248 parts per billion no guideline <0.020 <0.020 to <0.020
Arochlor 1254 parts per billion no guideline <0.020 <0.020 to <0.020
Arochlor 1260 parts per billion no guideline <0.020 <0.020 to <0.020
Phenoxy Acid Herbicides
2,4,5-T parts per billion no guideline <0.5000 <0.5000 to <0.5000
2,4,5-TP parts per billion no guideline <0.5000 <0.5000 to <0.5000
2,4-D parts per billion no more than 100 <0.5000 <0.5000 to <0.5000
2,4-DB parts per billion no guideline <0.0500 <0.0500 to <0.0500
2,4-DP parts per billion no guideline <0.5000 <0.5000 to <0.5000
Bromoxynil parts per billion no more than 5 <0.5000 <0.5000 to <0.5000
Dicamba parts per billion no more than 120 0.0077 <0.0060 to 0.0164
Dinoseb parts per billion no guideline <0.5000 <0.5000 to <0.5000
MCPA parts per billion no more than 100 <0.5000 <0.5000 to <0.5000
MCPB parts per billion no guideline <0.0500 <0.0500 to <0.0500
Mecoprop parts per billion no guideline <0.5000 <0.5000 to <0.5000
Picloram parts per billion no more than 190 <0.5000 <0.5000 to <0.5000
Pesticides
Alachlor parts per billion no guideline <0.1000 <0.1000 to <0.2000
Aldrin parts per billion no guideline <0.0080 <0.0080 to <0.0100
alpha-BHC parts per billion no guideline <0.0080 <0.0080 to <0.0100
alpha-Chlordane parts per billion no guideline <0.0080 <0.0080 to <0.0100
alpha-Endosulfan parts per billion no guideline <0.0100 <0.0100 to <0.0100
Atrazine parts per billion no more than 5 <0.1000 <0.1000 to <0.2000
Azinphos-methyl parts per billion no more than 20 <0.0100 <0.0100 to <0.0200
beta-BHC parts per billion no guideline <0.0080 <0.0080 to <0.0100
beta-Endosulfan parts per billion no guideline <0.0100 <0.0100 to <0.0100
Carbaryl parts per billion no more than 90 <0.2000 <0.2000 to <0.4000
Carbofuran parts per billion no more than 90 <0.2000 <0.2000 to <0.4000
Chlorothalonil parts per billion no guideline <0.050 <0.050 to <0.050
Chlorpyrifos parts per billion no more than 90 <0.0050 <0.0050 to <0.0100
delta-BHC parts per billion no guideline <0.0080 <0.0080 to <0.0100
Diazinon parts per billion no more than 20 <0.0050 <0.0050 to <0.0100
Diclofop-methyl parts per billion no more than 9 <0.1000 <0.1000 to <0.2000
Dieldrin parts per billion no guideline <0.0080 <0.0080 to <0.0100
Dimethoate parts per billion no more than 20 <0.1000 <0.1000 to <0.2000
Endrin parts per billion no guideline <0.0100 <0.0100 to <0.0100
Eptam parts per billion no guideline <2.00 <0.200 to <2.00
gamma-Chlordane parts per billion no guideline <0.0080 <0.0080 to <0.0100
Heptachlor parts per billion no guideline <0.0080 <0.0080 to <0.0100
Heptachlor Epoxide parts per billion no guideline <0.0080 <0.0080 to <0.0100
Lindane (gamma-BHC) parts per billion no guideline <0.0080 <0.0080 to <0.0100
Malathion parts per billion no more than 190 <0.1000 <0.1000 to <0.2000
Methoxychlor parts per billion no guideline <0.5000 <0.0080 to <0.5000
Methyl Parathion parts per billion no guideline <0.1000 <0.1000 to <0.2000
Metribuzin parts per billion no more than 80 <0.2000 <0.2000 to <0.4000
Mirex parts per billion no guideline <0.0080 <0.0080 to <0.0100
o,p-DDD parts per billion no guideline <0.0100 <0.0040 to <0.0100
o,p-DDE parts per billion no guideline <0.0100 <0.0040 to <0.0100
o,p-DDT parts per billion no guideline <0.5000 <0.0040 to <0.5000
p,p-DDD parts per billion no guideline <0.0100 <0.0040 to <0.0100
p,p-DDE parts per billion no guideline <0.0100 <0.0040 to <0.0100
p,p-DDT parts per billion no guideline <0.0500 <0.0040 to <0.0500
Parathion parts per billion no guideline <0.0130 <0.0130 to <0.0260
Propaclor parts per billion no guideline <0.200 <0.200 to <0.200
Propanil parts per billion no guideline <0.200 <0.200 to <0.200
Propoxur parts per billion no guideline <0.200 <0.200 to <0.200
Simazine parts per billion no more than 10 <0.1000 <0.1000 to <0.2000
Terbufos parts per billion no more than 1 <0.1000 <0.1000 to <0.2000
Triallate parts per billion no guideline <0.1000 <0.1000 to <0.2000
Trichlopyr parts per billion no guideline <0.0500 <0.0500 to <0.0500
Trifluralin parts per billion no more than 45 <0.0300 <0.0300 to <0.0600
Total Metals
Aluminum parts per million no guideline 0.00597 0.00249 to 0.03896
Antimony parts per million no more than 0.006 0.000062 <0.000025 to 0.000393
Arsenic parts per million no more than 0.010 0.000297 0.000163 to 0.000488
Boron parts per million no more than 5 0.00474 <0.00208 to 0.00936
Cadmium parts per million no more than 0.007 <0.000007 <0.000007 to 0.000009
Calcium parts per million no guideline 20.771 18.206 to 25.569
Chromium parts per million no more than 0.05 0.00035 <0.00004 to 0.01358
Chromium VI parts per million no guideline <0.00050 <0.00050 to <0.00050
Copper parts per million no more than 2.0 0.000778 <0.000022 to 0.014543
Iron parts per million no more than 0.3 * 0.06678 0.01878 to 0.22882
Lead parts per million no more than 0.005 <0.000065 <0.000065 to <0.000065
Magnesium parts per million no guideline 6.327 5.479 to 7.812
Manganese parts per million no more than 0.12 0.00976 0.00518 to 0.02605
Mercury parts per billion no more than 1 <0.0050 <0.00050 to <0.0050
Nickel parts per million no guideline 0.002449 0.001791 to 0.003072
Potassium parts per million no guideline 1.274 0.973 to 1.743
Sodium parts per million no more than 200 * 29.317 24.692 to 36.565
Uranium parts per million no more than 0.02 <0.000032 <0.000032 to 0.000052
Zinc parts per million no more than 5.0 * 0.00124 0.00019 to 0.01616

* Aesthetic objective: These guidelines have an objective and not a maximum acceptable limit. These parameters should not impact the safety of the water to drink and there is no anticipated health risk for short-term exposures.

Guidelines from 'Summary of Guidelines for Canadian Drinking Water Quality' by Health Canada, September 2020

Results in red are over acceptable limits per guideline.

Note: Where value is expressed as less than (<), the value is halved and used in the calculations, where value is expressed as greater than (>), the value is used in the calculations

Last updated: April 15, 2021

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