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Found 10 records similar to Guidelines for Canadian Drinking Water Quality: Guideline Technical Document – Nitrate and Nitrite

Federal

The maximum acceptable concentration (MAC) for chlorite in drinking water is 1 mg/L. The MAC for chlorate in drinking water is 1 mg/L. A guideline for chlorine dioxide is not required because of its rapid reduction to chlorite in drinking water. Utilities should make every effort to meet the guidelines, however, any method of control employed must not compromise the effectiveness of water disinfection.

Last Updated: Nov. 30, 2021
Date Published: Jan. 22, 2017
Organization: Health Canada
Formats: HTML
Keywords:  Canadian drinking-water quality, technical document, chlorite, chlorite in drinking-water, chlorate, chlorate in drinking-water, maximum acceptable concentration, health risks
Federal

The guideline technical document for trihalomethanes (THMs) also includes a specific guideline for bromodichloromethane (BDCM). The maximum acceptable concentration (MAC) for trihalomethanes (THMs) in drinking water is 0.100 mg/L (100 µg/L) based on a locational running annual average of a minimum of quarterly samples taken at the point in the distribution system with the highest potential THM levels. The maximum acceptable concentration (MAC) for bromodichloromethane (BDCM) in drinking water is 0.016 mg/L (16 µg/L) monitored at the point in the distribution system with the highest potential THM levels.

Last Updated: Nov. 30, 2021
Date Published: Oct. 23, 2016
Organization: Health Canada
Formats: HTML
Keywords:  Canadian drinking-water quality, technical document, trihalomethanes, trihalomethanes in drinking-water, bromodichloromethane, bromodichloromethane in drinking-water, maximum acceptable concentration, health risks
Federal

Although hardness may have significant aesthetic effects, a maximum acceptable level has not been established because public acceptance of hardness may vary considerably according to the local conditions. Water supplies with a hardness greater than 200 mg/L are considered poor but have been tolerated by consumers; those in excess of 500 mg/L are unacceptable for most domestic purposes.

Last Updated: Nov. 30, 2021
Date Published: Oct. 23, 2016
Organization: Health Canada
Formats: HTML
Keywords:  Canadian drinking-water quality, technical document, hardness, hardness in drinking-water, maximum acceptable concentration, health risks
Federal

Because cyanide is toxic to humans, a maximum acceptable concentration of 0.2 mg/L (200 µg/L) for free cyanide in drinking water has been set.

Last Updated: Nov. 30, 2021
Date Published: Oct. 23, 2016
Organization: Health Canada
Formats: HTML
Keywords:  Canadian drinking-water quality, technical document, cyanide, cyanide in drinking-water, maximum acceptable concentration, health risks
Federal

The aesthetic objective for zinc is ≤5.0 mg/L. Zinc is an essential element and is generally considered to be non-toxic. Intake of zinc from food is more than sufficient to satisfy the recommended daily requirements. Drinking water is not regarded as an important nutritional source of this element.

Last Updated: Nov. 30, 2021
Date Published: Oct. 23, 2016
Organization: Health Canada
Formats: HTML
Keywords:  Canadian drinking-water quality, technical document, zinc, water containing zinc, maximum acceptable concentration, health risks
Federal

Low levels of fluoride occur naturally in most sources of drinking water in Canada. Fluoride can occur naturally in surface waters from the deposition of particulates from the atmosphere and the weathering of fluoride-containing rocks and soils, and in groundwater from leaching from rock formations. The maximum acceptable concentration (MAC) for fluoride in drinking water is 1.5 mg/L.

Last Updated: Nov. 30, 2021
Date Published: Oct. 23, 2016
Organization: Health Canada
Formats: HTML
Keywords:  Canadian drinking-water quality, technical document, fluoride, fluoride in drinking-water, maximum acceptable concentration, health risks
Federal

Mercury is a toxic element and serves no beneficial physiological function in man; a maximum acceptable concentration of 0.001 mg/L (1 µg/L) in drinking water has therefore been established.

Last Updated: Nov. 30, 2021
Date Published: Dec. 29, 2016
Organization: Health Canada
Formats: HTML
Keywords:  Canadian drinking-water quality, technical document, mercury, mercury in drinking-water, maximum acceptable concentration, health risks
Federal

Antimony may enter the aquatic environment by way of natural weathering of rocks, runoff from soils, effluents from mining and manufacturing operations, and industrial and municipal leachate discharges. Household piping and possibly non-leaded solders are sources of antimony in tap water, as soft water may leach antimony from the pipes. The maximum acceptable concentration (MAC) for antimony in drinking water is 0.006 mg/L (6 µg/L).

Last Updated: Nov. 29, 2021
Date Published: Jan. 23, 2017
Organization: Health Canada
Formats: HTML
Keywords:  Canadian drinking-water quality, technical document, antimony, antimony in drinking-water, health risks
Federal

Trichloroethylene (TCE) is a volatile solvent that is used extensively in the automotive and metals industries for vapour degreasing and cold cleaning of metal parts. Canadians can be exposed to TCE through its presence in drinking water, air and food. Certain segments of the population could be exposed via contaminated soil or occupational settings.The maximum acceptable concentration (MAC) for trichloroethylene in drinking water is 0.005 mg/L (5 µg/L).

Last Updated: Nov. 30, 2021
Date Published: Oct. 23, 2016
Organization: Health Canada
Formats: HTML
Keywords:  Canadian drinking-water quality, technical document, trichloroethylene, trichloroethyle in drinking-water, maximum acceptable concentration, health risks
Federal

An aesthetic objective of ≤250 mg/L has been established for chloride in drinking water. At concentrations above the aesthetic objective, chloride imparts undesirable tastes to water and to beverages prepared from water and may cause corrosion in the distribution system.

Last Updated: Nov. 29, 2021
Date Published: Jan. 4, 2017
Organization: Health Canada
Formats: HTML
Keywords:  Canadian drinking-water quality, technical document, chloride, chloride in drinking-water, maximum acceptable concentration, health risks
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