A substance that can cause malformation in the fetus
following exposure of the mother. The malformation or abnormality may be biochemical
or anatomic and be of genetic or environmental origin.
The advanced cleaning of wastewater that goes beyond secondary
treatment. This process removes nutrients such as
phosphorus and nitrogen and most biological oxygen demand
and suspended solids.
The layering of warmer waters over colder waters that can occur in lakes, usually
in the summertime. This layering occurs because as surface waters are warmed they
become less dense than the underlying colder waters.
Maximum Daily Load TMDL
TMDLs are set by regulators to allocate
the maximum amount of a pollutant that may be introduced
into a water body and still assure attainment and maintenance of water
quality standards. Related Program - Water Related CFRs
and Rules, Federal and State Statutes
One of the nine critical
pollutants, toxaphene is an insecticide that was developed as a substitute
for DDT. Its use is now restricted in the U.S. and Canada.
Toxaphene has been detected in wildlife as far north as the Arctic and levels
in Lake Superior appear to be increasing in fish and sediments.
Related Program - Binational Program
A substance or combination of substances, including
disease-causing agents, which may cause death, disease, behavioral abnormalities,
cancer, genetic mutations, physiological malfunctions
(including reproductive malfunctions), or physical deformation in organisms or
their offspring. Also refers to those substances listed under Section 307(a) of
the Clean Water Act or Minnesota Statutes.
Related Program - Clean Water Act, 40
Toxic Substances Management in the Great Lakes
Basin Through the Permitting Process Agreement
agreement entered into by the environmental administrators of the Great
Lakes States in 1986 requiring that Best Available Control
Technology be installed wherever possible on all new and existing sources
of persistent air toxic pollutants which impact the Great
Lakes. This agreement is pursuant to implementing the governors Great
Lakes Toxic Substances Control Agreement.
The inherent potential of a substance to cause adverse effects in a living organism.
See acute toxicity and chronic toxicity.
A procedure that measures the degree
of effect caused by a chemical or effluent, by exposing
living test organisms to the substance. See also acute toxicity
and chronic toxicity.