Laws & Regulations

Puerto Rico Impaired Waters List

The documents detail the Puerto Rico impaired waters list.

Request for Information

EPA is issuing a RFI to gather public input on a broader range of fuel options for the school bus sector. Public comments will directly inform the structure and priorities of a new spring 2026 grant program.

CWA-309(a)-22-002: Imperial Irrigation District, Imperial, CA; Administrative Order on Consent

Administrative Order on Consent in the Matter of Imperial Irrigation District, Imperial, California. EPA Docket Number CWA-309(a)-22-002.

Air Standards Delegations in EPA’s Pacific Southwest (Region 9)

Federal air regulations that have been delegated to state or local air pollution control agencies in Region 9

Emergency Fuel Waivers

Temporary waivers due to emergency situations when the fuel supply suffers major disruption.

Small Entity Compliance Guides

List of Small Entity Compliance Guides available to aid the user in complying with an associated rule

Certificate of Registration for the National Vehicle and Fuel Emissions Laboratory (NVFEL) for Conformance to International Organization for Standardization (ISO) 14001:2015 Standards

This certificate recognizes that the EPA NVFEL has been assessed by NSF-ISR and found to be in conformance to ISO 14001:2004 Standards.

Manufacturer-Run In-Use Testing Program Data for Heavy-Duty Diesel Engines – Test Order Year 2016

This page provides manufacturer-run in-use testing program data from heavy-duty diesel engine manufacturers in compliance with 40 CFR 86 Subpart T for Test Year 2016.

Manufacturer-Run In-Use Testing Program Data for Heavy-Duty Diesel Engines – Test Order Year 2017

This page provides manufacturer-run in-use testing program data from heavy-duty diesel engine manufacturers in compliance with 40 CFR 86 Subpart T for Test Year 2017.

Regulations for Emissions from Marine Spark-Ignition Engines

EPA standards for exhaust and evaporative emissions reduce the environmental impact from marine spark-ignition engines and vessels.

Light-duty Vehicle Greenhouse Gas Program Technical Amendments

EPA finalizes two technical corrections to the Light-duty Vehicle Greenhouse Gas (GHG) Emissions Standards Regulations.

Heavy-Duty Highway Powertrain Family Naming Conventions

This page provides the engine family naming convention for heavy-duty powertrain families.

Reporting Templates for Light-Duty Greenhouse Gas (GHG) Standards

Manufacturers must submit greenhouse gas certification and reporting data through EV-CIS, formerly Verify, EPA’s engine and vehicle compliance information system.

EPA’s Marine Remanufacturing Program: Maintaining Compliance when Rebuilding Category 1 and 2 Marine Diesel Engines

EPA maintains a list of remanufacture systems, or “kits”, certified for use with Category 1 and 2 marine diesel engines according to the provisions of 40 CFR Part 1042, Subpart I, and is periodically updated.

Heavy-Duty Highway Tractors and Vocational Vehicles: Family Naming Conventions

How to create Positions 5-12 of your Engine Family name for Complete Heavy-Duty Highway Vehicles (tractors and vocational vehicles >14,000 pounds GVWR).

Information about Family Naming Conventions for Vehicles and Engines

Family naming conventions overview, find applicable model year code, determine your manufacturer code, and find you industry sector.

EPA, MDEQ to Hold Community Meeting, Provide Update on Agency Response to TCE Contamination in Private Drinking Water Wells

Media Advisory, (EPA) and Mississippi Department of Environmental Quality (MDEQ) will hold a community meeting on Thursday, March 5.

• Release Date: March 3, 2026

Small Business Advocacy Review (SBAR) Panels

Provides an overview on Small Business Advocacy Review (SBAR) Panels, which convene for proposed rules unless the rule will not have a significant economic impact on small entities

External Resources for Laws and Regulations

Online resources from other agencies such as the Government Publishing Office and U.S. Congress, as well as Cornell University, can further assist with learning about EPA regulations and locating official documentation such as Federal Register notices.

TSCA Section 5(a)(3)(C) Determination for Premanufacture Number (PMN) P-19-0027

This document describes EPA's pre-manufacture notice review determination under amended TSCA for P-19-0027.