40 CFR § 450.23 - Effluent limitations reflecting the best conventional pollutant control technology (BCT).

---
identifier: "/us/cfr/t40/s450.23"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 450.23 - Effluent limitations reflecting the best conventional pollutant control technology (BCT)."
title_number: 40
title_name: "Protection of Environment"
section_number: "450.23"
section_name: "Effluent limitations reflecting the best conventional pollutant control technology (BCT)."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "N"
subchapter_name: "EFFLUENT GUIDELINES AND STANDARDS"
part_number: "450"
part_name: "CONSTRUCTION AND DEVELOPMENT POINT SOURCE CATEGORY"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "33 U.S.C. 1311, 1312, 1314, 1316, 1341, 1342, 1361 and 1370."
regulatory_source: "74 FR 63057, Dec. 1, 2009, unless otherwise noted."
cfr_part: "450"
---


# 450.23 Effluent limitations reflecting the best conventional pollutant control technology (BCT).

Except as provided in 40 CFR 125.30 through 125.32, any point source subject to this subpart must achieve, at a minimum, the following effluent limitations representing the degree of effluent reduction attainable by application of the best conventional pollutant control technology (BCT). The effluent limitations are described at § 450.21.