Annex 2: Water quality guidelines used by Manitoba

Abbreviations used in the following table:

  • 2,4-dichlorophenoxyacetic acid (2,4-D)
  • 2-methyl-4-chlorophenoxyacetic acid (MCPA)
  • calcium carbonate (CaCO3)
  • litre (L)
  • micrograms (µg)
  • milligrams (mg)
  • nitrogen (N)
Water quality guidelines used by Manitoba
ParameterFormGuidelineSource
2,4-D 4 µg/L1
AmmoniaFootnote Atotal as NCalculation based on pH and temperature2
3
AmmoniaFootnote Bun-ionized19 µg/L4
ArsenicFootnote Aextractable, total150 µg/L5
ArsenicFootnote Btotal5 µg/L1
CadmiumFootnote Aextractable, total[e0.7409*ln[hardness]−4.719]*[1.101672 – {In[hardness](0.041838)}] µg/L
where hardness is measured as mg [CaCO3]/L]
6
ChlorideFootnote Bdissolved120 mg/L1
CopperFootnote Aextractable, total[e0.8545*ln[hardness]-1.702]*(0.96) µg/L
where hardness is measured as mg [CaCO3]/L
2
CopperFootnote Btotal2 µg/L for hardness < 90 mg [CaCO3]/L
0.2*[e0.8545*ln[hardness]-1.465] μg/L for hardness > 90 mg [CaCO3]/L
4
IronFootnote Atotal0.3 mg/L4
Leadextractable, totale1.273*ln[hardness]-4.705 * 1.46203 – ln[hardness]*0.145712 µg/L
where hardness is measured as mg [CaCO3]/L
4
MCPA 2.6 µg/L1
NickelFootnote Aextractable, totale0.8460*ln[hardness]+0.0584*0.997 µg/L
where hardness is measured as mg [CaCO3]/L
5
NickelFootnote Btotal< e0.76*ln[hardness]+1.06 µg/L
where hardness is measured as mg [CaCO3]/L
4
NitrateFootnote Atotal dissolved2.9 mg N/L4
NitrogenFootnote Btotal1 mg N/L7
OxygenFootnote Adissolved5 mg/L4
OxygenFootnote Bdissolved6.5 mg/L1
pH between 6.5 and 91
Phosphorustotal0.05 mg/L2
7
Suspended sedimentsFootnote AtotalMaximum increase of 25 mg/L for high flow and turbid waters above background levels4
ZincFootnote Atotale(0.8473*ln[hardness]+0.884)*0.986 µg/L
where hardness is measured as mg [CaCO3]/L
2
6
ZincFootnote Btotal7.5 µg/L for hardness ≤ 90 mg [CaCO3]/L
7.5 + 0.75*(hardness-90) for hardness > 90 mg [CaCO3]/L
4

Footnotes

Footnote A

Applies to sites monitored under provincial monitoring programs.

Return to footnote A referrer

Footnote B

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

Return to footnote B referrer

Manitoba Water Quality Guideline Sources:

1
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 17 December, 2014.
2
Manitoba Water Stewardship (2011) Manitoba water quality standards, objectives, and guidelines. (PDF; 905 KB) Retrieved on 17 December, 2014.
3
United States Environmental Protection Agency (1999a) Update of Ambient Water Quality Criteria for Ammonia. Document EPA 822-R-99-014. (PDF; 790 KB) Retrieved on 17 December, 2014.
4
5
United States Environmental Protection Agency (2009) National Recommended Water Quality Criteria. Retrieved on 17 December, 2014.
6
United States Environmental Protection Agency (1999b) National recommended water quality criteria – correction. Document EPA 822-Z-99-001. (PDF; 340 KB) Retrieved on 17 December, 2014.
7
Prairie Provinces Water Board (1992) Master Agreement on Apportionment. Schedule E: Agreement on Water Quality. Retrieved on 17 December, 2014.

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