40 CFR § 131.15 - Authorizing the use of schedules of compliance for water quality-based effluent limits in NPDES permits.
---
identifier: "/us/cfr/t40/s131.15"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 131.15 - Authorizing the use of schedules of compliance for water quality-based effluent limits in NPDES permits."
title_number: 40
title_name: "Protection of Environment"
section_number: "131.15"
section_name: "Authorizing the use of schedules of compliance for water quality-based effluent limits in NPDES permits."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "D"
subchapter_name: "WATER PROGRAMS"
part_number: "131"
part_name: "WATER QUALITY STANDARDS"
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. 1251"
regulatory_source: "48 FR 51405, Nov. 8, 1983, unless otherwise noted."
cfr_part: "131"
---
# 131.15 Authorizing the use of schedules of compliance for water quality-based effluent limits in NPDES permits.
If a State intends to authorize the use of schedules of compliance for water quality-based effluent limits in NPDES permits, the State must adopt a permit compliance schedule authorizing provision. Such authorizing provision is a water quality standard subject to EPA review and approval under section 303 of the Act and must be consistent with sections 502(17) and 301(b)(1)(C) of the Act.
[80 FR 51049, Aug. 21, 2015]