RECEIVEDCLERK'S OFFICEBEFORE THE ILLINOIS POLLUTION CONTROL BOARDIN THE MATTER OF : ) PROPOSED AMENDMENTS TO ) R04-25DISSOLVED OXYGEN STANDARD ) 35 IILL.
This paper focuses on biological criteria and tiering or subdividing the aquatic
life use as an approach to updating Illinois water quality standards .
Background
The basic framework for the current water quality standards in Illinois were formulated in1972.
Historically, when the term water quality is used, it implies the chemical characteristics
of the water.
Ultimately, incorrectly identifyin...
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