Annex 2

Water quality guidelines used by Manitoba

Parameter	Form	Guideline	Source
2,4-D1		4 μg/L	a
Ammonia1	total as N	Calculation based on pH and temperature	b c
Ammonia2	un-ionized	19 μg/L	d
Arsenic1	extractable, total	150 µg/L	e
Arsenic2	total	5 µg/L	a
Cadmium1	extractable, total	e0.7852*ln[hardness]−2.715 µg/L where hardness as mg [CaCO3]/L]	f
Chloride2	dissolved	150 mg/L	d
Copper1	extractable, total	e0.8545*ln[hardness]-1.702 * 0.96 µg/L where hardness as mg [CaCO3]/L	b
Copper2	total	2 μg/L for hardness < 90 mg [CaCO3]/L e0.8545*ln[hardness]-1.465*0.2 μg/L for hardness >90 mg [CaCO3]/L where hardness as mg [CaCO3]/L]	d
Iron1	total	0.3 mg/L	d
Lead	extractable, total	e1.273*ln[hardness]-4.705 μg/L where hardness as mg [CaCO3]/L	d
MCPA		2.6 µg/L	a
Nickel1	extractable, total	e0.8460*ln[hardness]+0.0584 * 0.997 µg/L where hardness as mg [CaCO3]/L	e
Nitrate1	total dissolved	2.9 mg N/L	d
Nickel2	total	< e0.76[ln(hardness)]+1.06 µg/L where hardness as mg [CaCO3]/L	d
Nitrogen2	total	1 mg N/L	a
Oxygen1	dissolved	5 mg/L	e
Oxygen2	dissolved	6.5 mg/L	a
pH		between 6.5 and 9	a
Phosphorus	total	0.05 mg/L	b g
Suspended sediments1	total	Maximum increase of 25 mg/L for high flow and turbid waters above background levels	d
Zinc1	total	< e0.8473*ln[hardness]+0.884 8 0.986 µg/L where hardness as mg [CaCO3]/L	b f
Zinc2	total	7.5 μg/L for hardness ≤ 90 mg [CaCO3]/L 7.5 + 0.75*(hardness-90) for hardness > 90 mg	d

¹ Applies to stations monitored under provincial monitoring programs.

² Applies to stations monitored under federal monitoring programs (Prairie Provinces Water Board).

Sources - Manitoba

a	Canadian Council of Ministers of the Environment (2007) Canadian Water Quality Guidelines for the Protection of Aquatic Life: Summary table, Update 7.1. Retrieved on 21 September 2011.
b	Manitoba Water Stewardship (2011) Manitoba water quality standards, objectives, and guidelines. Retrieved on 22 September 2011.
c	United States Environmental Protection Agency (1999a) Update of Ambient Water Quality Criteria for Ammonia. Document EPA 822-R-99-014. Retrieved on 3 August 2011.
d	Government of Canada (2008) Technical guidance document for water quality index practitioners reporting under the Canadian Environmental Sustainability Indicators (CESI) initiative. Environment Canada and Statistics Canada. Retrieved on 13 May 2011.
e	United States Environmental Protection Agency (2009) National Recommended Water Quality Criteria. Retrieved on 2 August 2011.
f	United States Environmental Protection Agency (1999b) National recommended water quality criteria – correction. Document EPA 822-Z-99-001. Retrieved on 15 November 2011.
g	Prairie Provinces Water Board (1992) Master Agreement on Apportionment. Schedule E: Agreement on Water Quality. Retrieved on 3 August 2011.

Annex 2: Water quality guidelines used by each province and territory