---
kind: "section"
citation: "40 C.F.R. § 412.12"
title: "40"
number: "412.12"
heading: "Effluent limitations attainable by the application of the best practicable control technology currently available (BPT)."
url: "https://uscodex.org/cfr/40/412.12"
---

# §412.12. Effluent limitations attainable by the application of the best practicable control technology currently available (BPT).

- (a) Except as provided in [40 CFR 125.30 through 125.32](/cfr/40/125.30..125.32.md), and subject to the provisions of [paragraph (b)](#b) of this section, any existing point source subject to this subpart must achieve the following effluent limitations representing the application of BPT: There shall be no discharge of process waste water pollutants to navigable waters.
- (b) Process waste pollutants in the overflow may be discharged to navigable waters whenever rainfall events, either chronic or catastrophic, cause an overflow of process waste water from a facility designed, constructed and operated to contain all process generated waste waters plus the runoff from a 10-year, 24-hour rainfall event for the location of the point source.

## Notes

### Authority

Authority: 33 U.S.C. 1311, 1314, 1316, 1317, 1318, 1342, 1361.

### Source

Source: 68 FR 7269, Feb. 12, 2003, unless otherwise noted.