Site Feedback

Title 40

Displaying title 40, up to date as of 8/11/2026. Title 40 was last amended 8/07/2026.
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 144Underground Injection Control Program144.1 – 144.89
Subpart AGeneral Provisions144.1 – 144.8
§ 144.1Purpose and scope of part 144.
§ 144.2Promulgation of Class II programs for Indian lands.
§ 144.3Definitions.
§ 144.4Considerations under Federal law.
§ 144.5Confidentiality of information.
§ 144.6Classification of wells.
§ 144.7Identification of underground sources of drinking water and exempted aquifers.
§ 144.8Noncompliance and program reporting by the Director.
Subpart BGeneral Program Requirements144.11 – 144.19
Subpart CAuthorization of Underground Injection by Rule144.21 – 144.28
Subpart DAuthorization by Permit144.31 – 144.41
Subpart EPermit Conditions144.51 – 144.55
§ 144.51Conditions applicable to all permits.
§ 144.52Establishing permit conditions.
§ 144.53Schedule of compliance.
§ 144.54Requirements for recording and reporting of monitoring results.
§ 144.55Corrective action.
Subpart FFinancial Responsibility: Class I Hazardous Waste Injection Wells144.60 – 144.70
Subpart GRequirements for Owners and Operators of Class V Injection Wells144.79 – 144.89