40 CFR § 139.16 - Desalination and purification systems.

---
identifier: "/us/cfr/t40/s139.16"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 139.16 - Desalination and purification systems."
title_number: 40
title_name: "Protection of Environment"
section_number: "139.16"
section_name: "Desalination and purification systems."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "D"
subchapter_name: "WATER PROGRAMS"
part_number: "139"
part_name: "DISCHARGES INCIDENTAL TO THE NORMAL OPERATION OF VESSELS"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "33 U.S.C. 1251"
regulatory_source: "89 FR 82131, Oct. 9, 2024, unless otherwise noted."
cfr_part: "139"
---


# 139.16 Desalination and purification systems.

(a) The requirements in paragraph (b) of this section apply to discharges from onboard desalination and purification systems used to generate freshwater from seawater or otherwise purify water.

(b) The discharge resulting from the cleaning of desalination and purification systems with toxic or hazardous materials is prohibited.