Site Feedback

Title 40

Displaying title 40, up to date as of 4/17/2024. Title 40 was last amended 4/17/2024.
There have been changes in the last two weeks to Chapter I.
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 AGeneral1 – 31
Subchapter BGrants and Other Federal Assistance33 – 49
Subchapter CAir Programs50 – 99
Subchapter DWater Programs100 – 149
Subchapter EPesticide Programs150 – 189
Subchapter FRadiation Protection Programs190 – 197
Subchapter GNoise Abatement Programs201 – 211
Subchapter HOcean Dumping220 – 238
Subchapter ISolid Wastes239 – 299
Subchapter JSuperfund, Emergency Planning, and Community Right-to-Know Programs300 – 399
Subchapter NEffluent Guidelines and Standards400 – 471
Subchapter OSewage Sludge501 – 503
Part 501State Sludge Management Program Regulations501.1 – 501.34
Part 503Standards for the Use or Disposal of Sewage Sludge503.1 – 503.48
Subchapter P [Reserved]
Subchapter QEnergy Policy600 – 699
Part 600Fuel Economy and Greenhouse Gas Exhaust Emissions of Motor Vehicles600.001 – 600.514-12
Part 610Fuel Economy Retrofit Devices610.10 – 610.65
Parts 611-699 [Reserved]
Subchapter RToxic Substances Control Act700 – 799
Subchapters S-T [Reserved]
Subchapter UAir Pollution Controls1000 – 1099