§303.444. Salt Creek, Higgins Creek, West Branch of the DuPage River, Des Plaines River

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The General Use chronic water quality standard for cyanide in 35 Ill. Adm. Code 302.208 does not apply to Salt Creek, Higgins Creek, the West Branch of the DuPage River, and the Des Plaines River in Cook County, Illinois. Instead, for these waters the chronic cyanide standard is 10 μg/L.

(Source: Amended at 47 Ill. Reg. 4575, effective March 23, 2023)

                    
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