Site Feedback

Title 40

Displaying title 40, up to date as of 7/10/2026. Title 40 was last amended 7/09/2026.
eCFR Content

The Code of Federal Regulations (CFR) is the official legal print publication containing the codification of the general and permanent rules published in the Federal Register by the departments and agencies of the Federal Government. The Electronic Code of Federal Regulations (eCFR) is a continuously updated online version of the CFR. It is not an official legal edition of the CFR.

Learn more about the eCFR, its status, and the editorial process.

Title 40Protection of EnvironmentPart / Section
Chapter IEnvironmental Protection Agency1 – 1099
Subchapter DWater Programs100 – 149
Part 122EPA Administered Permit Programs: the National Pollutant Discharge Elimination System122.1 – 122.64
Subpart BPermit Application and Special NPDES Program Requirements122.21 – 122.38
§ 122.21Application for a permit (applicable to State programs, see § 123.25).
§ 122.22Signatories to permit applications and reports (applicable to State programs, see § 123.25).
§ 122.23Concentrated animal feeding operations (applicable to State NPDES programs, see § 123.25).
§ 122.24Concentrated aquatic animal production facilities (applicable to State NPDES programs, see § 123.25).
§ 122.25Aquaculture projects (applicable to State NPDES programs, see § 123.25).
§ 122.26Storm water discharges (applicable to State NPDES programs, see § 123.25).
§ 122.27Silvicultural activities (applicable to State NPDES programs, see § 123.25).
§ 122.28General permits (applicable to State NPDES programs, see § 123.25).
§ 122.29New sources and new dischargers.
§ 122.30What are the objectives of the storm water regulations for small MS4s?
§ 122.31As a Tribe, what is my role under the NPDES storm water program?
§ 122.32As an operator of a small MS4, am I regulated under the NPDES storm water program?
§ 122.33Requirements for obtaining permit coverage for regulated small MS4s.
§ 122.34Permit requirements for regulated small MS4 permits.
§ 122.35May the operator of a regulated small MS4 share the responsibility to implement the minimum control measures with other entities?
§ 122.36As an operator of a regulated small MS4, what happens if I don't comply with the application or permit requirements in §§ 122.33 through 122.35?
§ 122.37Will the small MS4 storm water program regulations at §§ 122.32 through 122.36 and § 123.35 of this chapter change in the future?
§ 122.38Public notification requirements for CSO discharges to the Great Lakes Basin.