---
kind: "section"
citation: "40 C.F.R. § 445.21"
title: "40"
number: "445.21"
heading: "Effluent limitations attainable by the application of the best practicable control technology currently available (BPT)."
url: "https://uscodex.org/cfr/40/445.21"
---

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


Except as provided in [40 CFR 125.30 through 125.32](/cfr/40/125.30..125.32.md), any existing point source subject to this subpart must achieve the following effluent limitations which represent the application of BPT:


## Notes

### Amendments

[65 FR 3048, Jan. 19, 2000; 65 FR 14344, Mar. 16, 2000]

### Authority

Authority: Secs. 301, 304, 306, 307, 308, 402 and 501 of the Clean Water Act, as amended (33 U.S.C. 1311, 1314, 1316, 1317, 1318, 1342 and 1361)

### Source

Source: 65 FR 3048, Jan. 19, 2000, unless otherwise noted.

### Amendments

[65 FR 3048, Jan. 19, 2000; 65 FR 14344, Mar. 16, 2000]