That portion of a water body adjacent to an effluent outfall where mixing results in the dilution of the effluent with the receiving water. Water quality criteria may be exceeded in a mixing zone as conditioned and provided for in WAC 173-201A-100.
A limited area or volume of water where initial dilution of a point source pollutant discharge takes place. The zone is extended to cover the secondary mixing in the surrounding waterbody. Numeric water quality criteria can be exceeded, but acutely toxic conditions are prevented from occurring in this zone. Also see "Clean Water Act," "National Pollutant Discharge Elimination System."
a defined area or volume of a receiving water surrounding by or adjacent to a wastewater discharge where the receiving water, as a result of the discharge, may not meet all applicable water quality criteria standards
a defined area surrounding or downstream of a point source discharge where the effluent plume is progressively diluted by the receiving water and numeric criteria otherwise applicable to the segment may be exceeded
a limited area or volume of water where initial dilution of a discharge takes place and beyond which applicable water quality criteria should not be exceeded
a limited area, within a surface water or ground water, where dilution of a discharge may occur
an area in a water body where pollution levels exceed state water quality standards
an area of a lake or river where pollutants from a point source discharge are mixed, usually by natural means, with cleaner water
an area where industrial wastewater is diluted by a river before it reaches areas frequented by people or concentrations of fish, according to Rob Burkhart , a water quality analyst for the Department of Environmental Quality
an area where pollutants are mixed with cleaner receiving waters to dilute their concentration in the water
a portion of the river or lake where the state waives the legal water quality criteria
A limited area or volume of water where initial dilution of a discharge takes place and where numeric water quality criteria can be exceeded but acutely toxic conditions are prevented from occurring. A mixing zone defines the location where a discharge, which may exceed numeric limits, can mix with water of higher quality so that dilution can occur.
An allocated impact area in a water body where numeric water quality criteria can be exceeded as long as acutely toxic conditions are prevented. Also referred to as ZID (Zone of Initial Dilution).
An area where an effluent discharge undergoes initial dilution and is extended to cover the secondary mixing in the ambient waterbody. A mixing zone is an allocated impact zone where water quality criteria can be exceeded as long as acutely toxic conditions are prevented.
