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2019 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, 2019

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 3.3 1.9 to 5.9
Carbon, Total Organic parts per million no guideline 3.0 1.6 to 5.6
Chlorine, Free parts per million no guideline 1.28 0.95 to 1.77
Chlorine, Total parts per million no guideline 1.45 1.04 to 1.96
Chlorophyll-a parts per billion no guideline <1.0 <1.0 to <1.0
Colour, True TCU no more than 15 * 0.8 0.0 to 2.5
Conductivity microsiemens per centimetre no guideline 299 213 to 365
Microcystin parts per billion no more than 1.5 <0.2 <0.2 to <0.2
Odour units inoffensive* 13 5 to 20
ORP millivolts no guideline 518.2 258.8 to 661.4
Oxygen, Dissolved parts per million no guideline 12.5 8.5 to 16.7
pH units between 7.0 and 10.5 7.75 7.52 to 8.07
Plankton (algae) count cells/mL no guideline <100 <100 to <100
Solids, Total parts per million no guideline 183 143 to 234
Solids, Total Dissolved parts per million no more than 500 * 162 114 to 203
Temperature degrees Celcius no more than 15 * 9.6 1.3 to 23.6
Turbidity (clearness) NTU no more than 0.3 in 95% of measurements/month, never to exceed 1.0 0.14 0.08 to 0.63
UV Transmittance, Filtered percent transmissivity no guideline 94.9 91.8 to 98.1
UV Transmittance, Unfiltered percent transmissivity no guideline 94.1 90.8 to 97.6
Anions and Nutrients
Alkalinity, Total parts per million as calcium carbonate no guideline 69.3 61.1 to 84.2
Hardness, Total parts per million as calcium carbonate no guideline 80.7 73.8 to 91.6
Chloride parts per million no more than 250 * 4.2 1.3 to 8.1
Perchlorate parts per billion no guideline <0.20 <0.20 to <0.20
Sulphate parts per million no more than 500 * 69.3 59.4 to 83.6
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 2
Disinfection By-Products
Aldehydes parts per billion no guideline 13.5 3.6 to 22.3
Bromodichloromethane parts per billion no guideline 1.1 <0.4 to 2.2
Haloacetic acids parts per billion no more than 80 12.8 4.8 to 28.8
Trihalomethanes parts per billion no more than 100 12.3 4.6 to 24.1
Taste and Odours
236 TCA - 2,3,6-trichloroanisole parts per trillion no guideline <0.49 <0.030 to <0.50
246 TCA - 2,4,6-trichloroanisole parts per trillion no guideline <0.49 <0.020 to <0.50
345 TCV - 3,4,5-trichloroveratrole parts per trillion no guideline <0.17 <0.17 to <0.20
Geosmin parts per trillion no guideline 2.21 <0.99 to 8.44
IBMP - 2-isobutyl-3-methoxypyrazine parts per trillion no guideline <0.2 <0.008 to <0.20
IPMP - 2-isopropyl-3-methoxypyrazine parts per trillion no guideline <0.2 <0.010 to <0.20
Dichloromethane parts per million no more than 0.05 <0.0050 <0.00050 to <0.0050
MIB - 2-methylisoborneol parts per trillion no guideline <9.8 <9.8 to <10
MTBE - methyl tertiary-butyl ether parts per million no more than 0.015 * <0.00050 <0.00050 to <0.00050
NDMA -
N-nitrosodimethylamine
parts per trillion no more than 40 1.05 <0.50 to 1.85
Total Metals
Aluminum parts per million no guideline 0.00448 0.00158 to 0.00835
Antimony parts per million no more than 0.006 <0.000025 <0.000025 to 0.000052
Arsenic parts per million no more than 0.010 0.000259 0.000101 to 0.000387
Boron parts per million no guideline 0.00278 <0.00208 to 0.00664
Cadmium parts per million no more than 0.005 <0.000007 <0.000007 to <0.000007
Calcium parts per million no guideline 22.169 17.986 to 25.637
Chromium parts per million no more than 0.05 0.00004 <0.00004 to 0.00025
Chromium VI parts per million no guideline <0.00050 <0.00050 to <0.00050
Copper parts per million no more than 2.0 0.000325 <0.000022 to 0.000983
Iron parts per million no more than 0.3 * 0.04908 0.00953 to 0.10025
Lead parts per million no more than 0.005 <0.000065 <0.000065 to <0.000065
Magnesium parts per million no guideline 6.587 5.484 to 7.578
Manganese parts per million no more than 0.12 0.00860 0.00242 to 0.01837
Mercury parts per billion no more than 1 0.00052 <0.00050 to 0.00085
Nickel parts per million no guideline 0.002361 0.001414 to 0.002824
Potassium parts per million no guideline 1.285 1.007 to 1.702
Sodium parts per million no more than 200 * 30.526 24.833 to 38.527
Uranium parts per million no more than 0.02 <0.000032 <0.000032 to <0.000032
Zinc parts per million no more than 5.0 * 0.00073 <0.00011 to 0.01410
Pesticides
Alachlor parts per billion no guideline <0.10 <0.10 to <0.10
Aldrin parts per billion no guideline <0.010 <0.010 to <0.010
alpha-BHC parts per billion no guideline <0.010 <0.010 to <0.010
alpha-Chlordane parts per billion no guideline <0.010 <0.010 to <0.010
alpha-Endosulfan parts per billion no guideline <0.010 <0.010 to <0.010
Atrazine parts per billion no more than 5 <0.10 <0.10 to <0.10
Azinphos-methyl parts per billion no more than 20 <0.010 <0.010 to <0.010
beta-BHC parts per billion no guideline <0.010 <0.010 to <0.010
beta-Endosulfan parts per billion no guideline <0.010 <0.010 to <0.010
Carbaryl parts per billion no guideline <0.20 <0.20 to <0.20
Carbofuran parts per billion no more than 90 <0.20 <0.20 to <0.20
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 <0.0050
delta-BHC parts per billion no guideline <0.010 <0.010 to <0.010
Diazinon parts per billion no more than 20 <0.0050 <0.0050 to <0.0050
Diclofop-methyl parts per billion no more than 9 <0.10 <0.10 to <0.10
Dieldrin parts per billion no guideline <0.010 <0.010 to <0.010
Dimethoate parts per billion no more than 20 <0.10 <0.10 to <0.10
Endrin parts per billion no guideline <0.010 <0.010 to <0.010
Eptam parts per billion no guideline <2.0 <0.20 to <2.0
gamma-Chlordane parts per billion no guideline <0.010 <0.010 to <0.010
Heptachlor parts per billion no guideline <0.010 <0.010 to <0.010
Heptachlor Epoxide parts per billion no guideline <0.010 <0.010 to <0.010
Lindane (gamma-BHC) parts per billion no guideline <0.010 <0.010 to <0.010
Malathion parts per billion no more than 190 <0.10 <0.10 to <0.10
Methoxychlor parts per billion no guideline <0.010 <0.010 to <0.010
Methyl Parathion parts per billion no guideline <0.10 <0.10 to <0.10
Metribuzin parts per billion no more than 80 <0.20 <0.20 to <0.20
Mirex parts per billion no guideline <0.010 <0.010 to <0.010
o,p-DDD parts per billion no guideline <0.010 <0.010 to <0.010
o,p-DDE parts per billion no guideline <0.010 <0.010 to <0.010
o,p-DDT parts per billion no guideline <0.010 <0.010 to <0.010
p,p-DDD parts per billion no guideline <0.010 <0.010 to <0.010
p,p-DDE parts per billion no guideline <0.010 <0.010 to <0.010
p,p-DDT parts per billion no guideline <0.010 <0.010 to <0.010
Parathion parts per billion no guideline <0.013 <0.013 to <0.013
Propaclor parts per billion no guideline <0.20 <0.20 to <0.20
Propanil parts per billion no guideline <0.20 <0.20 to <0.20
Propoxur parts per billion no guideline <0.20 <0.20 to <0.20
Simazine parts per billion no more than 10 <0.10 <0.10 to <0.10
Terbufos parts per billion no more than 1 <0.10 <0.10 to <0.10
Triallate parts per billion no guideline <0.10 <0.10 to <0.10
Trichlopyr parts per billion no guideline <0.050 <0.050 to <0.050
Trifluralin parts per billion no more than 45 <0.030 <0.030 to <0.030
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 <0.50 <0.050 to <0.50
2,4,5-TP parts per billion no guideline <0.50 <0.050 to <0.50
2,4-D parts per billion no more than 100 <0.50 <0.050 to <0.50
2,4-DB parts per billion no guideline <0.050 <0.050 to <0.050
2,4-DP parts per billion no guideline <0.50 <0.050 to <0.50
Bromoxynil parts per billion no more than 5 <0.50 <0.020 to <0.50
Dicamba parts per billion no more than 120 <0.0060 <0.0060 to 0.0133
Dinoseb parts per billion no guideline <0.50 <0.050 to <0.50
MCPA parts per billion no more than 100 <0.50 <0.025 to <0.50
MCPB parts per billion no guideline <0.050 <0.050 to <0.050
Mecoprop parts per billion no guideline <0.50 <0.050 to <0.50
Picloram parts per billion no more than 190 <0.20 <0.20 to <0.50

* 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, June 2019

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 1, 2019

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