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2015 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

Test results are from January 1 to December 31, 2015

What is being measured How it's measured Guideline or regulation Water Treatment Plant treated average Water Treatment Plant treated range Comments
Odour  units Inoffensive 19 12 to 30 Meets the guideline
Methylene Chloride (Dichloromethane) parts per billion no more than 50 <0.5 <0.5 to 0.7 Meets the guideline
Perchlorate parts per billion no guideline <0.2 <0.2 to <0.2 -
Geosmin parts per trillion no guideline 1.7 <0.5 to 3.7 Common taste and odour compound
IPMP - 2-isopropyl-3-methoxypyrazine parts per trillion no guideline <0.2 <0.2 to <0.2 Common taste and odour compound
IBMP - 2-isobutyl-3-methoxypyrazine parts per trillion no guideline <0.2 <0.2 to <0.2 Common taste and odour compound
MIB - 2-methylisoborneol parts per trillion no guideline <10 <10 to <50 Common taste and odour compound
246 TCA - 2,4,6-trichloroanisole parts per trillion no guideline <0.5 <0.5 to <0.5 Common taste and odour compound
236 TCA - 2,3,6-trichloroanisole parts per trillion no guideline <0.5 <0.5 to <0.5 Common taste and odour compound
345 TCV - 3,4,5-trichloroveratrole parts per trillion no guideline <0.2 <0.2 to <0.2 Common taste and odour compound
MTBE - methyl tertiary-butyl ether parts per million no more than 0.015 * <0.0005 <0.0005 to <0.0005 Meets the guideline
NDMA -
N-nitrosodimethylamine
parts per billion no more than 0.04 0.0009 0.0007 to 0.0011 Meets the guideline
Plankton (algae) count  cells/mL no guideline <100 <100 to <100 Algae contribute to odours and may cause filter clogging
Chlorophyll-a parts per billion no guideline <1 <1 to <1 Chlorophyll is found in algae
Microcystin LR parts per billion no more than 1.5 <0.2 <0.2 to <0.2 Meets the guideline
Turbidity (clearness) NTU no more than 0.3 in 95% of measurements/month, never to exceed 1.0 0.11 <0.05 to 0.52 Meets the guideline
Colour, True TCU no more than 15 * 0.8 0.5 to 2.5 Meets the guideline
Total Solids parts per million no guideline 193 164 to 242 -
Total Dissolved Solids parts per million no more than 500 * 181 139 to 229 Meets the guideline
Conductivity microsiemens per centimetre no guideline 318 294 to 355 Another measure of dissolved solids
pH  units between 6.5 and 8.5 * 7.74 7.39 to 8.09 Meets the guideline
Temperature degrees Celcius no more than 15 * 11.2 1.7 to 23.2 Does not always meet the guideline.
Total Alkalinity parts per million as calcium carbonate no guideline 66 54 to 77 -
Total Hardness parts per million as calcium carbonate no guideline 81 73 to 94 -
Total Organic Carbon parts per million no guideline 4 2 to 15 -
Dissolved Organic Carbon parts per million no guideline 4 2 to 15 -
Dissolved Oxygen parts per million no guideline 11.9 8.3 to 15.8 -
Total Phosphorus parts per million no guideline 0.004 <0.001 to 0.008 Phosphorus can contribute to algae growth
Chloride parts per million no more than 250 * 22 15 to 27 Meets the guideline
Sulphate parts per million no more than 500 * 52 44 to 65 Meets the guideline
UV Transmittance (Filtered) percent transmissivity no guideline 95.6 92.0 to 98.1 -
UV Transmittance (Unfiltered) percent transmissivity no guideline 94.5 90.6 to 97.4 -
Chlorine (free) parts per million no guideline 1.15 0.92 to 1.90 -
Chlorine (total) parts per million no guideline 1.30 1.08 to 2.18 -
Trihalomethanes parts per billion no more than 100 5 <1 to 13 Meets the guideline
Bromodichloromethane parts per billion no guideline <1 <1 to 2 -
Haloacetic acids parts per billion no more than 80 17 11 to 37 Meets the guideline
Aldehydes parts per billion no guideline 14 6 to 24 -
Carbofuran parts per billion no more than 90 <0.20 <0.20 to <0.20 Meets the guideline
Propoxur parts per billion no guideline <0.20 <0.20 to <0.20 -
Aldrin 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 -
alpha-Chlordane parts per billion no guideline <0.010 <0.010 to <0.010 -
gamma-Chlordane 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 -
Dieldrin 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 -
Methoxychlor 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 -
beta-BHC parts per billion no guideline <0.010 <0.010 to <0.010 -
delta-BHC 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 -
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 -
Alpha Endosulfan 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 -
Endrin parts per billion no guideline <0.010 <0.010 to <0.010 -
Mirex parts per billion no guideline <0.010 <0.010 to <0.010 -
Simazine parts per billion no more than 10 <0.10 <0.10 to <0.10 Meets the guideline
Alachlor parts per billion no guideline <0.10 <0.10 to <0.10 -
Atrazine parts per billion no more than 5 <0.10 <0.10 to <0.10 Meets the guideline
Metribuzin parts per billion no more than 80 <0.20 <0.20 to <0.20 Meets the guideline
Azinphosmethyl parts per billion no more than 20 <0.10 <0.10 to <0.10 Meets the guideline
Chlorpyrifos parts per billion no more than 90 <0.10 <0.10 to <0.10 Meets the guideline
Diazinon parts per billion no more than 20 <0.10 <0.10 to <0.10 Meets the guideline
Dimethoate parts per billion no more than 20 <0.10 <0.10 to <0.10 Meets the guideline
Malathion parts per billion no more than 190 <0.10 <0.10 to <0.10 Meets the guideline
Parathion parts per billion no guideline <0.10 <0.10 to <0.10 -
Terbufos parts per billion no more than 1 <0.10 <0.10 to <0.10 Meets the guideline
Methyl Parathion parts per billion no guideline <0.10 <0.10 to <0.10 -
2,4-D parts per billion no more than 100 <0.050 <0.050 to <0.050 Meets the guideline
2,4-DB parts per billion no guideline <0.050 <0.050 to <0.050 -
2,4-DP parts per billion no guideline <0.050 <0.050 to <0.050 -
2,4,5-T parts per billion no guideline <0.050 <0.050 to <0.050 -
2,4,5-TP parts per billion no guideline <0.050 <0.050 to <0.050 -
Bromoxynil parts per billion no more than 5 <0.020 <0.020 to <0.020 Meets the guideline
Dicamba parts per billion no more than 120 <0.0060 <0.0060 to 0.0116 Meets the guideline
Dinoseb parts per billion no guideline <0.050 <0.050 to <0.050 -
MCPA parts per billion no more than 100 <0.025 <0.025 to <0.025 Meets the guideline
MCPB parts per billion no guideline <0.050 <0.050 to <0.050 -
Mecoprop parts per billion no guideline <0.050 <0.050 to <0.050 -
Picloram parts per billion no more than 190 <0.20 <0.20 to <0.20 Meets the guideline
Trichlopyr parts per billion no guideline <0.050 <0.050 to <0.050 -
Diclofop-methyl parts per billion no more than 9 <0.10 <0.10 to <0.10 Meets the guideline
Eptam parts per billion no guideline <0.20 <0.20 to <0.20 -
Propachlor 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 -
Triallate parts per billion no guideline <0.10 <0.10 to <0.10 -
Trifluralin parts per billion no more than 45 <0.030 <0.030 to <0.030 Meets the guideline
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 -
Calcium parts per million no guideline 20.8 18.1 to 24.8 Contributes to hardness
Magnesium parts per million no guideline 5.90 4.80 to 7.46 Contributes to hardness
Sodium parts per million no more than 200 * 30.7 25.6 to 37.9 Meets the guideline
Potassium parts per million no guideline 1.24 1.10 to 1.44 -
Iron parts per million no more than 0.3 * 0.034 <0.008 to 0.108 Meets the guideline
Copper parts per million no more than 1.0 * 0.0029 <0.0003 to 0.0067 Meets the guideline
Lead parts per million no more than 0.010 <0.0004 <0.0004 to 0.0004 Meets the guideline
Aluminum parts per million no more than 0.1 0.0191 <0.0005 to 0.0447 Meets the guideline
Arsenic parts per million no more than 0.010 0.0004 0.0003 to 0.0006 Meets the guideline
Chromium parts per million no more than 0.05 <0.0007 <0.0007 to 0.0023 Meets the guideline
Chromium VI parts per billion no guideline <10 <10 to <10 -
Nickel parts per million no guideline 0.003 0.002 to 0.005 -
Cadmium parts per million no more than 0.005 <0.0004 <0.0004 to <0.0004 Meets the guideline
Manganese parts per million no more than 0.05 * 0.0282 0.0147 to 0.0411 Meets the guideline
Zinc parts per million no more than 5.0 * 0.0044 <0.0005 to 0.0433 Meets the guideline
Mercury parts per million no more than 0.001 0.0000012 <0.0000005 to 0.0000050 Meets the guideline
Antimony parts per million no more than 0.006 <0.0005 <0.0005 to 0.0006 Meets the guideline
Boron parts per million no more than 5 0.012 0.005 to 0.032 Meets the guideline
Cobalt parts per million no guideline <0.0005 <0.0005 to <0.0005 -
Molybdenum parts per million no guideline <0.0005 <0.0005 to <0.0005 -
Selenium parts per million no more than 0.05 <0.0005 <0.0005 to 0.0005 Meets the guideline
Silver parts per million no guideline <0.0005 <0.0005 to <0.0005 -
Tin parts per million no guideline 0.0006 0.0005 to 0.0007 -
Titanium parts per million no guideline 0.0012 0.0011 to 0.0012 -
Uranium parts per million no more than 0.02 <0.0005 <0.0005 to <0.0005 Meets the guideline
Zirconium parts per million no guideline <0.0005 <0.0005 to 0.0006 -

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

* 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, October 2014

Last updated: December 7, 2017