U.S. Code of Federal Regulations

Regulations most recently checked for updates: Oct 07, 2025

All TitlesTitle 40Chapter IPart 117Subpart A - Subpart A—General Provisions
View all text of Subpart A [§ 117.1 - § 117.3]
§ 117.2 - Abbreviations.

NPDES equals National Pollutant Discharge Elimination System. RQ equals reportable quantity.

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