§309.101. Preamble

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Permits may be required under either of two subparts – NPDES Permits, Subpart A, which regulates discharges into navigable waters as defined in the Clean Water Act (CWA), as defined at 35 Ill. Adm. Code 301.240, or Other Permits, Subpart B, which regulates certain structures and discharges from them that are not required to have an NPDES Permit.

(Source: Amended at 47 Ill. Reg. 5017, effective March 23, 2023)

                    
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