(mg/L)

Conditions

Jurisdiction

Reference

Date

1.0

surface water quality objectives

Manitoba

Anon

1979

1.5

surface water quality objectives

Sask.

Anon

1975

Alberta

Anon

1977

Alberta

Anon

?

fish and aquatic life

BC

Anon

1969

class 2B waters suitable for
fisheries and recreation

Manitoba

Anon

1980

threshold level for marine and estuarine waters

Australia

Anon

1982a

95th percentile, salmonid or
cyprinoid fish

Britain

Anon

1982

levels exceeding 1.5 mg/L
constitute a hazard in the
marine environment

EPA

Anon

1972

1.8

99th percentile, salmonid or
cyprinoid fish

Britain

Anon

1982

2.0

6-month median, marine and
estuarine water for harvesting
aquatic life for food or non-
edible uses and maintenance
of aquatic ecosystems

Australia

Anon

1981b

10.0

single sample limit, marine
and estuarine water for
harvesting aquatic life for food
or non-edible uses and
maintenance of aquatic
ecosystems

Australia

Anon

1981