2020 Water Treatment Plant raw water quality test results

The aqueduct carries raw water from Shoal Lake to Deacon Reservoir. Deacon Reservoir is a storage reservoir located just east of Winnipeg. There are four open cells at Deacon, which together hold 8.8 billion litres, enough water to supply Winnipeg for about 20 days. Before the Water Treatment Plant was built, raw water sampling was done at Deacon Reservoir. The water now leaves Deacon Reservoir and enters the Water Treatment Plant where we do our raw water testing.

Testing

We test the raw water at the Water Treatment Plant on a continual basis. We also test water from Shoal Lake, the Water Treatment Plant treated water outlet and the Winnipeg distribution system. We track seasonal variations in water quality as the water passes through the aqueduct, the Deacon Reservoirs and enters the Water Treatment Plant.

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

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

Test results are from January 1 to December 31, 2020

What is being measured	How it's measured	Water Treatment Plant raw average	Water Treatment Plant raw range
Miscellaneous
Carbon, Dissolved Organic	parts per million	8.3	3.2 to 11.1
Carbon, Total Organic	parts per million	8.2	7 to 10.6
Chlorine, Free	parts per million	0.02	<0.02 to 0.13
Chlorine, Total	parts per million	0.03	<0.02 to 0.15
Chlorophyll-a	parts per billion	7	1.1 to 14.7
Colour, Apparent	TCU	14.5	8.5 to 28.5
Colour, True	TCU	8.5	2 to 17
Conductivity	microsiemens per centimetre	162	152 to 176
Langelier Index (4 C)	units	-0.36	-0.42 to -0.31
Langelier Index (60 C)	units	0.41	0.36 to 0.46
Microcystin	parts per billion	<0.20	<0.20 to <0.20
Odour	units	89	75 to 150
ORP	millivolts	464.8	290.7 to 554.1
Oxygen, Dissolved	parts per million	11.1	6 to 14.9
pH	units	7.9	7.32 to 8.55
Plankton (algae) count	cells/mL	5,859	1,117 to 14,530
Solids, Total	parts per million	106	85 to 131
Solids, Total Dissolved	parts per million	85	64 to 115
Temperature	degrees Celcius	9.2	1.2 to 24.2
Turbidity (clearness)	NTU	0.96	0.35 to 3.88
UV Transmittance, Filtered	percent transmissivity	74.7	72.1 to 78.4
UV Transmittance, Unfiltered	percent transmissivity	72.9	70.2 to 76.4
Anions and Nutrients
Alkalinity, Total	parts per million as calcium carbonate	75.5	69.2 to 87
Alkalinity, Bicarbonate	parts per million	96.4	91.5 to 106
Alkalinity, Carbonate	parts per million	<0.60	<0.60 to <0.60
Alkalinity, Hydroxide	parts per million	<0.34	<0.34 to <0.34
Hardness, Total	parts per million as calcium carbonate	79.9	72.9 to 91.2
Ammonia	parts per million	0.01	<0.01 to 0.02
Bromide	parts per million	<0.01	<0.01 to <0.01
Chloride	parts per million	2	1.4 to 2.6
Fluoride	parts per million	0.061	0.059 to 0.065
Nitrate Nitrogen	parts per million	0.014	<0.005 to 0.037
Nitrite	parts per million	<0.001	<0.001 to 0.001
Perchlorate	parts per billion	<0.20	<0.20 to <0.20
Phosphorus,Total	parts per million	<0.030	<0.030 to <0.050
Sulphate	parts per million	1.2	<0.4 to 5.2
Disinfection By-Products
Aldehydes	parts per billion	6.6	4.3 to 10.3
Haloacetic acids	parts per billion	<1.2	<1.2 to <1.2
Trihalomethanes	parts per billion	<2.7	<2.7 to <2.7
Enteric Protozoa
Cryptosporidium	oocysts per 100 L	0	0 to 0
Giardia	cysts per 100 L	0	0 to 0
Total Metals
Aluminum	parts per million	0.00279	0.00094 to 0.0135
Antimony	parts per million	0.000046	<0.000025 to 0.000344
Arsenic	parts per million	0.000796	0.00052 to 0.001376
Barium	parts per million	0.015	0.014 to 0.0168
Beryllium	parts per million	<0.00010	<0.00010 to <0.00010
Bismuth	parts per million	<0.000050	<0.000050 to <0.000050
Boron	parts per million	0.00534	<0.00208 to 0.016
Cadmium	parts per million	<0.000007	<0.000007 to 0.000007
Calcium	parts per million	20.421	17.26 to 26.08
Cesium	parts per million	<0.000010	<0.000010 to <0.000010
Chromium	parts per million	0.00005	<0.00004 to 0.00041
Chromium VI	parts per million	<0.00050	<0.00050 to <0.00050
Cobalt	parts per million	<0.00010	<0.00010 to <0.00010
Copper	parts per million	0.000504	0.000043 to 0.002523
Iron	parts per million	0.06284	0.02854 to 0.13196
Lead	parts per million	<0.000065	<0.000065 to 0.000175
Lithium	parts per million	0.0026	0.0025 to 0.0028
Magnesium	parts per million	6.309	4.919 to 7.942
Manganese	parts per million	0.01323	0.00364 to 0.04925
Mercury	parts per billion	<0.0050	<0.00050 to <0.0050
Molybdenum	parts per million	0.000155	0.000148 to 0.000171
Nickel	parts per million	0.000206	<0.000021 to 0.001146
Potassium	parts per million	1.247	0.965 to 1.731
Rubidium	parts per million	0.0017	0.0016 to 0.0018
Selenium	parts per million	0.000067	0.000057 to 0.000077
Silicon	parts per million	3.04	2.12 to 3.49
Silver	parts per million	<0.000010	<0.000010 to <0.000010
Sodium	parts per million	2.341	2.023 to 2.891
Strontium	parts per million	0.0399	0.0372 to 0.0456
Tellurium	parts per million	<0.00020	<0.00020 to <0.00020
Thallium	parts per million	<0.000010	<0.000010 to <0.000010
Thorium	parts per million	<0.00010	<0.00010 to <0.00010
Tin	parts per million	<0.00010	<0.00010 to <0.00010
Titanium	parts per million	<0.00030	<0.00030 to <0.00030
Tungsten	parts per million	<0.00010	<0.00010 to <0.00010
Uranium	parts per million	<0.000032	<0.000032 to 0.000058
Vanadium	parts per million	<0.00050	<0.00050 to <0.00050
Zinc	parts per million	0.00085	<0.00011 to 0.00675
Zirconium	parts per million	<0.00020	<0.00020 to <0.00020
Pesticides
Alachlor	parts per billion	<0.1000	<0.1000 to <0.2000
Aldrin	parts per billion	<0.0080	<0.0080 to <0.0100
alpha-BHC	parts per billion	<0.0080	<0.0080 to <0.0100
alpha-Chlordane	parts per billion	<0.0080	<0.0080 to <0.0100
alpha-Endosulfan	parts per billion	<0.0100	<0.0100 to <0.0500
Atrazine	parts per billion	<0.1000	<0.1000 to <0.2000
Azinphos-methyl	parts per billion	<0.0100	<0.0100 to <0.0300
beta-BHC	parts per billion	<0.0080	<0.0080 to <0.0100
beta-Endosulfan	parts per billion	<0.0100	<0.0100 to <0.0500
Carbaryl	parts per billion	<0.2000	<0.2000 to <0.4000
Carbofuran	parts per billion	<0.2000	<0.2000 to <0.4000
Chlorothalonil	parts per billion	<0.050	<0.050 to <0.050
Chlorpyrifos	parts per billion	<0.0250	<0.0050 to <0.0250
delta-BHC	parts per billion	<0.0080	<0.0080 to <0.0100
Diazinon	parts per billion	<0.0250	<0.0050 to <0.0250
Diclofop-methyl	parts per billion	<0.1000	<0.1000 to <0.2000
Dieldrin	parts per billion	<0.0080	<0.0080 to <0.0100
Dimethoate	parts per billion	<0.1000	<0.1000 to <0.2000
Endrin	parts per billion	<0.0100	<0.0100 to <0.0100
Eptam	parts per billion	<0.200	<0.200 to <0.200
gamma-Chlordane	parts per billion	<0.0080	<0.0080 to <0.0100
Heptachlor	parts per billion	<0.0080	<0.0080 to <0.0100
Heptachlor Epoxide	parts per billion	<0.0080	<0.0080 to <0.0100
Lindane (gamma-BHC)	parts per billion	<0.0080	<0.0080 to <0.0100
Malathion	parts per billion	<0.1000	<0.1000 to <0.2000
Methoxychlor	parts per billion	<0.5000	<0.0080 to <0.5000
Methyl Parathion	parts per billion	<0.1000	<0.1000 to <0.2000
Metribuzin	parts per billion	<0.2000	<0.2000 to <0.4000
Mirex	parts per billion	<0.0080	<0.0080 to <0.0100
o,p-DDD	parts per billion	<0.0100	<0.0040 to <0.0100
o,p-DDE	parts per billion	<0.0100	<0.0040 to <0.0100
o,p-DDT	parts per billion	<0.5000	<0.0040 to <0.5000
p,p-DDD	parts per billion	<0.0100	<0.0040 to <0.0100
p,p-DDE	parts per billion	<0.0100	<0.0040 to <0.0100
p,p-DDT	parts per billion	<0.1000	<0.0040 to <0.1000
Parathion	parts per billion	<0.0130	<0.0130 to <0.0260
Propaclor	parts per billion	<0.200	<0.200 to <0.200
Propanil	parts per billion	<0.200	<0.200 to <0.200
Propoxur	parts per billion	<0.200	<0.200 to <0.200
Simazine	parts per billion	<0.1000	<0.1000 to <0.2000
Terbufos	parts per billion	<0.1000	<0.1000 to <0.2000
Triallate	parts per billion	<0.1000	<0.1000 to <0.2000
Trichlopyr	parts per billion	<0.0500	<0.0500 to <0.0500
Trifluralin	parts per billion	<0.0300	<0.0300 to <0.0600
Bacteria
Escherichia Coli	MPN per 100 mL	29	0 to >200
Total Coliforms	MPN per 100 mL	93	0 to >200
Heterotrophic Plate Count	CFU per mL	125	<1 to >300
Taste and Odours
236 TCA - 2,3,6-trichloroanisole	parts per trillion	<0.48	<0.48 to <0.51
246 TCA - 2,4,6-trichloroanisole	parts per trillion	<0.48	<0.48 to <0.51
345 TCV - 3,4,5-trichloroveratrole	parts per trillion	<0.19	<0.19 to <0.20
Geosmin	parts per trillion	7.23	1 to 34.7
IBMP - 2-isobutyl-3-methoxypyrazine	parts per trillion	<0.19	<0.19 to <0.20
IPMP - 2-isopropyl-3-methoxypyrazine	parts per trillion	<0.19	<0.19 to <0.20
Dichloromethane	parts per million	<0.0050	<0.0050 to <0.0050
MIB - 2-methylisoborneol	parts per trillion	<9.60	<9.60 to 16
MTBE - methyl tertiary-butyl ether	parts per million	<0.00050	<0.00050 to <0.00050
NDMA - N-nitrosodimethylamine	parts per trillion	2	0.51 to 4.1
Polychlorinated Biphenyls
Arochlor 1016	parts per billion	<0.0200	<0.0200 to <0.0200
Arochlor 1221	parts per billion	<0.0200	<0.0200 to <0.0200
Arochlor 1232	parts per billion	<0.0200	<0.0200 to <0.0200
Arochlor 1242	parts per billion	<0.0200	<0.0200 to <0.0200
Arochlor 1248	parts per billion	<0.0200	<0.0200 to <0.0200
Arochlor 1254	parts per billion	<0.0200	<0.0200 to <0.0200
Arochlor 1260	parts per billion	<0.0200	<0.0200 to <0.0200
Phenoxy Acid Herbicides
2,4,5-T	parts per billion	<0.5000	<0.5000 to <0.5000
2,4,5-TP	parts per billion	<0.5000	<0.5000 to <0.5000
2,4-D	parts per billion	<0.5000	<0.5000 to <0.5000
2,4-DB	parts per billion	<0.0500	<0.0500 to <0.0500
2,4-DP	parts per billion	<0.5000	<0.5000 to <0.5000
Bromoxynil	parts per billion	<0.5000	<0.5000 to <0.5000
Dicamba	parts per billion	0.009	<0.0060 to 0.0167
Dinoseb	parts per billion	<0.5000	<0.5000 to <0.5000
MCPA	parts per billion	<0.5000	<0.5000 to <0.5000
MCPB	parts per billion	<0.0500	<0.0500 to <0.0500
Mecoprop	parts per billion	<0.5000	<0.5000 to <0.5000
Picloram	parts per billion	<0.5000	<0.5000 to <0.5000

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

Guidelines for Canadian Drinking Water Quality do not appply to raw water.