OCT 2? 2004Re: Proposed amendments to dissolved oxygen standard (R04-25) STATE OF ILLINOISDorothy Gunn, Clerk PoJIut~onControl BoardIllinois Pollution Control BoardJames R.
Thompson Center
100 W.
Randolph St.
The current Illinois standard for
dissolved oxygen follows U.S.
Environmental Protection Agency guidelines and past scientific studies do not
support a lower standard.
At extremely low oxygen levels, fish kills result. As these stressors become intensified the
ecosystem deteriorates. The degradation of the Fox River has and will continue to affect the well being of itsre...
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