Wood preservation facilities, ammoniacal copper zinc arsenate: chapter C, table 3

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Element	Limit value (mg/L)	Basis (objectives)	Agency
Arsenic	Maximum: 0.05 mg/L	Protection of human health	International Joint Commission ^Footnotea
	Maximum: 0.01 mg/L	Objective: < 0.005 mg/L	Health Canada ^Footnoteb^Footnotec
	Fresh water: 0.005 mg/L Marine: 0.0125 mg/L	Protection of aquatic life	Canadian Council of Ministers of the Environment (CCME)^Footnoted
Ammonia	Maximum: 0.5 mg/L Maximum: 0.02 mg/L	Protection of human health Protection of aquatic life	International Joint Commission ^Footnotea
	No numerical guidelines (under review)		Health Canada ^Footnoteb^Footnotec
	Fresh water: 0.019 mg/L	Protection of aquatic life	Canadian Council of Ministers of the Environment (CCME) ^Footnoted
Copper	Maximum: 0.005 mg/L	Protection of aquatic life	International Joint Commission ^Footnotea
		Aesthetic objectives: < 1.0 mg/L/td>	Health Canada ^Footnoteb^Footnotec
	Fresh water: 0.002 mg/L Hardness 0-60 mg/L as CaCO₃ 0.003 mg/L Hardness 60-120 mg/L as CaCO₃ 0.004 mg/L Hardness 120-180 mg/L as CaCO₃ 0.006 mg/L Hardness > 180 mg/L as CaCO₃	Protection of aquatic life	Canadian Council of Ministers of the Environment (CCME) ^Footnoted
Zinc	Maximum: 0.03 mg/L	Protection of aquatic life	International Joint Commission ^Footnotea
		Aesthetic objectives: < 5.0 mg/L	Health Canada ^Footnoteb^Footnotec
	Freshwater: 0.03 mg/L	Protection of aquatic life	Canadian Council of Ministers of the Environment (CCME) ^Footnoted

Footnotes

Footnote a

Recommendations of the International Joint Commission (IJC) to the governments of Canada and the United States, Great Lakes Water Quality Agreement, 1978 (Review 2007).

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Footnote b

Health Canada, Guidelines for Canadian Drinking Water Quality, 2010.

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Footnote c

"Maximum acceptable” was defined by Health and Welfare Canada as: “Drinking water that contains substances in concentrations greater than these limits is either capable of producing deleterious health effects or is aesthetically objectionable.” “Objective” is defined by Health and Welfare Canada as: “This level is interpreted as the ultimate quality goal for both health and aesthetic purposes.”

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Footnote d

Canadian Council of Ministers of the Environment (CCME) Canadian Environmental Quality Guidelines, Water Quality Guidelines for the Protection of Aquatic Life

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Date modified:: 2017-09-10

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Wood preservation facilities, ammoniacal copper zinc arsenate: chapter C, table 3

Table 3. Regulatory Limits for Arsenic, Ammonia, Copper and Zinc in Natural Water Bodies

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