40 CFR § 110.3 - Discharge of oil in such quantities as “may be harmful” pursuant to section 311(b)(4) of the Act.

---
identifier: "/us/cfr/t40/s110.3"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 110.3 - Discharge of oil in such quantities as “may be harmful” pursuant to section 311(b)(4) of the Act."
title_number: 40
title_name: "Protection of Environment"
section_number: "110.3"
section_name: "Discharge of oil in such quantities as “may be harmful” pursuant to section 311(b)(4) of the Act."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "D"
subchapter_name: "WATER PROGRAMS"
part_number: "110"
part_name: "DISCHARGE OF OIL"
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  33 U.S.C. 1321(b)(3) and (b)(4) and 1361(a); E.O. 11735, 38 FR 21243, 3 CFR parts 1971-1975 Comp., p. 793."
regulatory_source: "52 FR 10719, Apr. 2, 1987, unless otherwise noted."
cfr_part: "110"
---


# 110.3 Discharge of oil in such quantities as “may be harmful” pursuant to section 311(b)(4) of the Act.

For purposes of section 311(b)(4) of the Act, discharges of oil in such quantities that the Administrator has determined may be harmful to the public health or welfare or the environment of the United States include discharges of oil that:

(a) Violate applicable water quality standards; or

(b) Cause a film or sheen upon or discoloration of the surface of the water or adjoining shorelines or cause a sludge or emulsion to be deposited beneath the surface of the water or upon adjoining shorelines.

[61 FR 7421, Feb. 28, 1996]