40 C.F.R. § 439.42
Effluent limitations attainable by the application of the best practicable control technology currently available (BPT).
Cite as 40 C.F.R. § 439.42 (2026)
Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart must achieve the following effluent limitations representing the application of BPT: (a) The limitation for BOD 5 is the same as specified in § 439.12(a). No facility shall be required to attain a monthly average limitation for BOD 5 that is less than the equivalent of 45 mg/L. (b) The limitation for TSS is the same as specified in § 439.12(b). (c) The limitations for COD are the same as specified in § 439.22(c) and (d). [63 FR 50435, Sept. 21, 1998, as amended at 68 FR 12274, Mar. 13, 2003]
- Cross-references to the CFR
- 40:125.30439.12439.22