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WATER POLLUTION 



Alteration of the aquatic environment in 

 such a way as to interfere with a designated 

 beneficial use. 



WATER QUALITY 

 CRITERIA 



"A scientific requirement on which a decision 

 or judgement may be based concerning the 

 suitability of water quality to support a 

 designated use." (See Water Quality Standard ) 



WATER QUALITY 

 STANDARD 



"A plan that is established by governmental 

 authority as a program for water pollution 

 prevention and abatement." (See Water Quality 

 Criteria) 



WINTER KILL 



The death of fishes in a body of water during 

 a prolonged period of ice and snow cover; 

 caused by oxygen exhaustion due to respiration 

 and lack of photosynthesis. (See Summer Kill ) 



