Illinois Effluent Limitations regulations & environmental compliance analysis

Illinois Effluent Limitations: What you need to know

Governing Law and Regulations

Effluent limitations: 35 Illinois Administrative Code (IAC) 304.101 to 304.303

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Permits and effluent limits: 35 IAC 304.141 and 35 IAC 309.143

Dilution: 35 IAC 304.102

Deoxygenating wastes: 35 IAC 304.120

Phosphorus (P): 35 IAC 304.123

Total ammonia nitrogen: 35 IAC 304.122

Total metals: 35 IAC 309.157

Disinfection exemptions: 35 IAC 378.101 to 378.204

Water quality standards: 35 IAC 302.100 to 302.502

Use designations: 35 IAC 303.100 to 303.502

Effluent trading: 415 Illinois Compiled Statutes (ILCS) 5/13.4

Total maximum daily loads (TMDL): 35 IAC 301.411

Regulatory Agencies

Illinois Environmental Protection Agency (IEPA) Bureau of Water Division of Water Pollution Control Surface Water Section

Illinois Pollution Control Board (IPCB)

U.S. Environmental Protection Agency (EPA) Region 5

See ADDRESSES & CONTACTS for addresses and telephone numbers.

See national section for basic information and federal regulations.

Comparison: State vs. Federal

Rules. Illinois effluent discharge quality limits are contained in the state's NPDES permit conditions issued to regulated facilities that discharge wastewater. The state generally follows the federal rules, but also has some additional requirements for effluent limitations related to toxicity, deoxygenating wastes, phosphorus, ammonia, and metals. See the national section EFFLUENT LIMITATIONS for additional guidance information about the federal requirements.

Illinois has established a pretreatment effluent trading program. IEPA's TMDL program is based on a watershed model to maintain the state's water quality standards (35 IAC 302.100 to 302.669).

Administration and enforcement. IEPA's Surface Water Section is responsible for monitoring the quality ...

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