Canadian Council of Ministers
of the Environment

Le Conseil canadien des ministres
de l'environnement

There are currently issues with the Summary Table’s download to excel function. We are working on resolving the issue. Our apologies for any inconvenience this may cause.
Bookmark this page Download Excel spreadsheet Download PDF

Dissolved oxygen

Synonyms and/or acronyms: DO
CASRN: N/A
Parameter 1: INORGANIC

Water Quality for the Protection of Aquatic Life

Further documentation on these guidelines can be found in the Canadian Environment Quality Guidelines.
Download Factsheet

Freshwater

Concentration (µg/L)

Variable

Lowest acceptable dissolved oxygen concentration:
for warm water biota: early life stages = 6000 µg/L
for warm water biota: other life stages = 5500 µg/L
for cold water biota: early life stages = 9500 µg/L
for cold water biota: other life stages = 6500 µg/L

Note:
Substance has been re-evaluated since CCREM 1987 + Appendixes. Either a new guideline has been derived or insufficient data existed to derive a new guideline.

Date

1999

Marine

Concentration (µg/L)

>8000 & Narrative

The recommended minimum concentration of DO in marine and estuarine waters is 8.0 mg/L.

Depression of DO below the recommended value should only occur as a result of natural processes. When the natural DO level is less than the recommended interim guideline, the natural concentration should become the interim guideline at that site. When ambient DO concentrations are >8.0 mg/L, human activities should not cause DO levels to decrease by more than 10% of the natural concentration expected in the receiving environment at that time.

Note:
Interim guideline.

Substance has been re-evaluated since CCREM 1987 + Appendixes. Either a new guideline has been derived or insufficient data existed to derive a new guideline.

Date

1996

Water Quality for the Protection of Agriculture

Irrigation

Concentration (µg/L)

No data

Date

No data

Livestock

Concentration (µg/L)

No data

Date

No data

Sediment Quality for the Protection of Aquatic Life

Freshwater

Concentration (µg/kg dry weight) - ISQG

No data

Concentration (µg/kg dry weight) - PEL

No data

Date

No data

Marine

Concentration (µg/kg dry weight) - ISQG

No data

Concentration (µg/kg dry weight) - PEL

No data

Date

No data

Soil Quality for the Protection of Environmental and Human Health

Concentration (mg/kg dry weight) - Agricultural

No data

Concentration (mg/kg dry weight) - Residential / parkland

No data

Concentration (mg/kg dry weight) - Commercial

No data

Concentration (mg/kg dry weight) - Industrial

No data

Date

No data

Tissue Residue Quality for the Protection of Widlife Consumer of Aquatic Biota

Concentration (µg/kg diet wet weight)

No data

Date

No data