40 CFR § 117.13 - Applicability to discharges from publicly owned treatment works and their users.
---
identifier: "/us/cfr/t40/s117.13"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 117.13 - Applicability to discharges from publicly owned treatment works and their users."
title_number: 40
title_name: "Protection of Environment"
section_number: "117.13"
section_name: "Applicability to discharges from publicly owned treatment works and their users."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "D"
subchapter_name: "WATER PROGRAMS"
part_number: "117"
part_name: "DETERMINATION OF REPORTABLE QUANTITIES FOR HAZARDOUS SUBSTANCES"
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authority: "33 U.S.C. 1251 and Executive Order 11735, superseded by Executive Order 12777, 56 FR 54757."
regulatory_source: "44 FR 50776, Aug. 29, 1979, unless otherwise noted."
cfr_part: "117"
---
# 117.13 Applicability to discharges from publicly owned treatment works and their users.
(a) [Reserved]
(b) These regulations apply to all discharges of reportable quantities to a POTW, where the discharge originates from a mobile source, except where such source has contracted with, or otherwise received written permission from the owners or operators of the POTW to discharge that quantity, and the mobile source can show that prior to accepting the substance from an industrial discharger, the substance had been treated to comply with any effluent limitation under sections 301, 302 or 306 or pretreatment standard under section 307 applicable to that facility.