40 CFR §437.31 — Effluent limitations attainable by the application of the best practicable control technology currently available (BPT).
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
Except as provided in 40 CFR 125.30 through 125.32 or § 437.30(b), any existing point source subject to this subpart must achieve the following effluent limitations representing the application of BPT: