40 CFR § 139.20 - Gas turbines.

---
identifier: "/us/cfr/t40/s139.20"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 139.20 - Gas turbines."
title_number: 40
title_name: "Protection of Environment"
section_number: "139.20"
section_name: "Gas turbines."
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: "2026-04-05"
last_updated: "2026-04-05"
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"
---


# 139.20 Gas turbines.

(a) The requirements in paragraph (b) of this section apply to discharges from the washing of gas turbine components.

(b) The discharge of untreated gas turbine washwater is prohibited unless infeasible.