Quality Standards for Drinking Water
MAC Maximum Acceptable Concentration
IMAC Interim Maximum Acceptable Concentration
AO Aesthetic Objective
British Columbia Drinking Water Quality Standards 1982
Canadian Drinking Water Quality Guidlines 1989
To align use Monaco 9 Font (fixed).
Parameter MAC IMAC AO Objective Units Limit Source Status Comment
Concentration Type
Alachlor Under Review
Aldicarb 0.009 mg/L Health CDWQG 1989
Aldrin + Dieldrin 0.0007 <=0.00000005 mg/L Health CDWQG 1989 Under Review
Alkalinity Phen. mg/L
Alkalinity Total 30-500 mg/L
Aluminum Under Review
Antimony <=0.0002 mg/L BCDWQS 1982 Under Review by CDWQG 1989
Arsenic Dissolved 0.025 <=0.005 mg/L CDWQG 1989 Under Review
Asbestos mg/L CDWQG 1989
Atrazine 0.06 mg/L Health CDWQG 1989
Azinphos-methyl 0.02 mg/L Health CDWQG 1989 Proposed
Barium 1.00 <=0.1 mg/L Health CDWQG 1989
Barium Dissolved 1 <=0.1 mg/L Health BCDWQS 1982
Bendiocarb 0.04 mg/L Health CDWQG 1989
Benzene 0.005 mg/L Health CDWQG 1989
Benzo(a)pyrene 0.00001 mg/L Health CDWQG 1989
Boron 5 <=0.01 mg/L Health CDWQG 1989 Under Review
Boron Dissolved 5 <=0.01 mg/L Health BCDWQS 1982
Bromoxynil 0.005 mg/L Health CDWQG 1989
Cadmium 0.005 <=0.001 mg/L Health CDWQG 1989
Cadmium Dissolved 0.005 <=0.001 mg/L Health BCDWQS 1982
Calcium mg/L CDWQG 1989 Proposed
Calcium Dissolved 200? mg/L BCDWQS 1982
Carbaryl 0.09 mg/L Health CDWQG 1989
Carbaryl 0.07 <=0.0005 mg/L Health BCDWQS 1982
Carbofuran 0.09 mg/L Health CDWQG 1989
Carbon Tetrachloride 0.005 mg/L Health CDWQG 1989
Cesium-137 50 Target> 5 Bq/L Health CDWQG 1989
from International Commission on Radiological Protection (ICRP) in Publication 26
Chlordane (Total Isomers) 0.007 <=0.00000005 mg/L Health CDWQG 1989 Under Review
Chloride <=250 <=250 mg/L Aesthetic CDWQG 1989
Chloride Dissolved <250 <=250 mg/L Aesthetic BCDWQS 1982
Chlorpyrifos 0.09 mg/L Health CDWQG 1989
Chromium 0.05 <=0.0002 mg/L Health CDWQG 1989
Chromium Dissolved 0.05 <=0.0002 mg/L BCDWQS 1982
Cobalt mg/L
Coliform Fecal 0 per 100 mL Health CDWQG 1989
Coliform Total <10 per 100 mL Health CDWQG 1989
Colour <=15 <=15 TCU Aesthetic CDWQG 1989
Copper <=1.0 mg/L Aesthetic CDWQG 1989 Under Review
Cyanazine 0.01 mg/L Health CDWQG 1989
Cyanide (free) 0.2 <=0.002 mg/L Health CDWQG 1989 Under Review
DDT + metabolites 0.03 <=0.00000005 mg/L Health CDWQG 1989 Under Review
Diazinon 0.014 <=0.000001 mg/L Health BCDWQS 1982
Diazon 0.02 mg/L Health CDWQG 1989
Dicamba 0.12 mg/L Health CDWQG 1989
Dichloro? 2,4,5-TP 0.01 <=0.001 mg/L Health BCDWQS 1982
Dichlorobenzene, 1,2- 0.2 <=0.003 mg/L Health CDWQG 1989
Dichlorobenzene, 1,4- 0.005 <=0.001 mg/L Health CDWQG 1989
Dichloroethane, 1,2 0.005 mg/L Health CDWQG 1989 Proposed
Dichloroethylene,1,1- Under Review
Dichloromethane 0.05 mg/L Health CDWQG 1989
Dichlorophenol, 2,4 0.9 <=0.0003 mg/L Health CDWQG 1989
Dichlorophenoxyacetic-acid2,4-D 0.1 <=0.001 mg/L Health CDWQG 1989 Under Review
Diclofop-methyl 0.009 mg/L Health CDWQG 1989
Dimethoate 0.02 mg/L Health CDWQG 1989
Dinoseb Under Review
Dioxins Under Review
Diquat 0.07 mg/L Health CDWQG 1989
Diuron 0.15 mg/L Health CDWQG 1989
Endrin 0.0002 <=0.00000005 mg/L Health BCDWQS 1982
Ethylbenzene <=0.0024 mg/L Aesthetic CDWQG 1989
Fluoride Dissolved 1.5 mg/L Health CDWQG 1989 Under Review
1.2 mg/L is optimum level for control of dental caries
Furans Under Review
Gasoline mg/L Health CDWQG 1989
Glyphosate 0.28 mg/L Health CDWQG 1989
Hardness (as CaCO3) 80 to 100 acceptable mg/L
Hardness (as CaCO3) > 200 poor mg/L
Hardness (as CaCO3) > 500 unacceptable mg/L
Hardness Dissolved 180 mg/L
Heptachlor + Heptachlor epoxide 0.003 <=0.00000005 mg/L Health CDWQG 1989 Under Review
Iodine-131 10 Target> 1 Bq/L Health CDWQG 1989
from International Commission on Radiological Protection (ICRP) in Publication 26
Iron <=0.3 <=0.05 mg/L Aesthetic CDWQG 1989 Proposed
Iron Dissolved 0.3 <=0.05 mg/L Aesthetic BCDWQS 1982
Lead 0.01 <=0.001 mg/L Health CDWQG 1989 Proposed
Lead Dissolved 0.01 <=0.001 mg/L Health BCDWQS 1982 used to be 0.05
Lindane 0.004 <=0.0000001 mg/L Health CDWQG 1989 Under Review
Linuron Under Review
Magnesium 50? mg/L
Magnesium mg/L Health CDWQG 1989 Proposed
Magnesium Dissolved 50 mg/L
Malathion 0.19 mg/L Health CDWQG 1989
Manganese <=0.05 <=0.01 mg/L Aesthetic CDWQG 1989 Proposed
Manganese Dissolved <=0.05 <=0.01 mg/L Aesthetic BCWQDS 1982
Mercury 0.001 <=0.0002 mg/L Health CDWQG 1989
Methoxychlor 0.9 mg/L Health CDWQG 1989
Methoxychlor 0.1 <=0.00000005 mg/L Health BCWQDS 1982
Methyl Parathion 0.007 <=0.000001 mg/L Health BCWQDS 1982
Methyl-4-chlorophenoxyacetic acid, 2-(MCPA) Under Review
Metolachlor 0.05 mg/L Health CDWQG 1989
Metribuzin 0.08 mg/L Health CDWQG 1989
Molybdenum mg/L
Monochlorobenzene 0.08 <=0.03 mg/L Health CDWQG 1989 Proposed
Nickel mg/L
Nitrate 45 mg/L Health CDWQG 1989 Proposed
Nitrate NO3 as Nitrogen 10 <=0.001 mg/L Health CDWQG 1989 Proposed
Nitrilotriacetic acid (NTA) 0.05 <=0.0002 mg/L Health CDWQG 1989 Under Review
Nitrite NO2 4.5 mg/L Health CDWQG 1989 Proposed
Nitrite NO2 as Nitrogen 1 <=0.001 mg/L Health CDWQG 1989 Proposed
Nitrogen Amm. Diss (N) mg/L Proposed
Odour inoffensive inoffensive Aesthetic CDWQG 1989
Paraquat 0.01 mg/L Health CDWQG 1989
Parathion 0.05 mg/L Health CDWQG 1989
Parathion 0.035 <=0.000001 mg/L Health BCDWQS 1982
Pentachlororophenol 0.06 <=0.03 mg/L Health CDWQG 1989
Pesticides (Total) 0.1 mg/L Health BCDWQS 1982
pH 6.5 to 8.5 pH units Aesthetic CDWQG 1989
Phenols 0.002 <0.002 mg/L Aesthetic BCDWQS 1982
Phorate 0.002 mg/L Health CDWQG 1989
Picloram 0.19 mg/L Health CDWQG 1989 Proposed
Polychlorinated biphenyls (PCBs) Under Review
Radium-226 1 Target> 0.1 Bq/L Health CDWQG 1989
from International Commission on Radiological Protection (ICRP) in Publication 26
Res. Filterable 1000 mg/L
Selenium 0.01 <=0.002 mg/L Health CDWQG 1989
Silver 0.05 <=0.005 mg/L BCDWQS 1982
Simazine 0.01 mg/L Health CDWQG 1989
Sodium see comment <=200 mg/L Aesthetic CDWQG 1989
Proposed Sodium restricted diets <20 mg/L. Inform physicians if greater
Strontium-90 10 Target> 1 Bq/L Health CDWQG 1989
from International Commission on Radiological Protection (ICRP) in Publication 26
Sulphate <=500 <=150 mg/L Aesthetic CDWQG 1989 Proposed
There may be a laxative effect in some individuals when sulphate levels exceed 500 mg/L
Sulphide (as H2S) <=0.05 <=0.05 mg/L Aesthetic CDWQG 1989 Proposed
Taste inoffensive inoffensive Aesthetic CDWQG 1989
Temephos 0.28 mg/L Health CDWQG 1989
Temperature <= 15 C <= 15 C degrees C Aesthetic CDWQG 1989
Terbufos 0.001 mg/L Health CDWQG 1989
Tetrachloroethylene Under Review
Tetrachlorophenol, 2,3,4,6- 0.1 <=0.001 mg/L Health CDWQG 1989
Toluene <=0.024 mg/L Aesthetic CDWQG 1989
Total Dissolved Solids <=500 mg/L Aesthetic CDWQG 1989 Under Review
Toxaphene 0.005 <=0.00000005 mg/L Health BCDWQS 1982
Triallate 0.23 mg/L Health CDWQG 1989
Trichloroacetic acid (TCA) Under Review
Trichloroethane,1,1,1- Under Review
Trichloroethylene 0.05 mg/L Health CDWQG 1989 Proposed
Trichlorophenoxyacetic-acid, 2,4,5-(2,4,5-T) 0.28 <=0.02 mg/L Health CDWQG 1989
Trifluralin 0.045 mg/L Health CDWQG 1989 Proposed
Trihalomethanes 0.35 <=0.0005 mg/L Health CDWQG 1989 Under Review
comprise chloroform, bromodichloromethane, chlorodibromomethane, and bromoform.
Tritium 40,000 Target> 4,000 Bq/L Health CDWQG 1989
from International Commission on Radiological Protection (ICRP) in Publication 26
Turbidity 1 <=5 <=1 NTU Health CDWQG 1989
Turbidity-consumption point 5 NTU Aesthetic CDWQG 1989
Turbidity-entering system 1 NTU Health CDWQG 1989
Uranium 0.1 <=0.001 mg/L Health CDWQG 1989 BCWQS 1982 was MAC at 0.02 mg/L
Vinyl chloride Under Review
Xylenes <=0.3 mg/L Aesthetic CDWQG 1989
Zinc <=5.0 <=5.0 mg/L Aesthetic CDWQG 1989 Proposed
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