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U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 40Chapter IPart 414Subpart I - Subpart I—Direct Discharge Point Sources That Use End-of-Pipe Biological Treatment
§ 414.90 - Applicability; description of the subcategory of direct discharge point sources that use end-of-pipe biological treatment.
§ 414.91 - Toxic pollutant effluent limitations and standards for direct discharge point sources that use end-of-pipe biological treatment.
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