Laws & Regulations

Municipal Solid Waste Landfills: New Source Performance Standards (NSPS), Emission Guidelines (EG) and Compliance Times

learn about the NSPS for municipal solid waste landfills by reading the rule summary, rule history, code of federal regulations text, fact sheets, background information documents, related rules and compliance information.

Updates to New Chemicals Regulations under the Toxic Substances Control Act

Updates to New Chemicals Regulations under the Toxic Substances Control Act (TSCA)

Kayenta Township Building Code

Kayenta Township resolution adopting building codes, including green building code adoption.

Coal Preparation and Processing Plants New Source Performance Standards (NSPS)

Learn about the NSPS regulation for coal preparation and processing plants by reading the rule summary, the rule history, the code of federal regulation text, the federal register, and additional docket documents

Farnsworth Unit

MRV Plan and Decision for Farmsworth Unit

Subpart GG Checklist

Zinc Production Checklist

Guidance for Email Transmittal of Air Permit Documents from Louisiana sources to R6AirPermitsLa@epa.gov

Provides email subject text and file naming conventions for people sending air permit related information to EPA Region 6 for sources located in Louisiana

Boat Manufacturing: National Emission Standards for Hazardous Air Pollutants (NESHAP)

Find the rule summary and history for the NESHAP for Boat Manufacturing, as well as the federal register citations, code of federal regulations, and a fact sheet on the rule.

MOVES Training

MOVES training materials and other useful links for learning to use EPA’s Motor Vehicle Emission Simulator (MOVES)

My company has two stores in different states. Must each store be a separate certified firm?

Answer: It depends on the company's structure. If each store is a separate legal entity, then each store must be a certified firm. If the parent company retains liability for the actions of each store, the parent company's firm certification covers both stores. Question Number: 23002-19722 Find a printable PDF…

Last published: April 25, 2025

Final Renewable Fuel Standards for 2019, and the Biomass-Based Diesel Volume for 2020

Learn more about final rulemaking for Volume Standards for 2019, and the Biomass-Based Diesel Volume for 2020

Proposed Volume Standards for 2020, and the Biomass-Based Diesel Volume for 2021

Learn more about proposed rulemaking for Volume Standards for 2020, and the Biomass-Based Diesel Volume for 2021

Learn About SmartWay Verified Aerodynamic Devices

Installing EPA-verified aerodynamic technologies on your trailer can help fleet and truck owners save fuel. Options include gap reducers, skirts, or tails and can be installed individually or in combination.

Documents Related to Volkswagen Violations for Model Years 2009-2016

Related documents on EPA's issued notice of violation (NOV) of the Clean Air Act (CAA) to Volkswagen. The NOV alleges software that circumvents EPA emissions standards for certain air pollutants.

Learn About FCA Violations

Learn about EPA's issued notice of violation (NOV) of the Clean Air Act (CAA) to Fiat Chrysler Automobiles N.V. and FCA US LLC. The NOV alleges that FCA installed software that circumvents EPA emissions standards for certain air pollutants.

Carbon Pollution from Transportation

Learn about the effects of carbon pollution from transportation.

CA0000018: Vessel Testing a Pilot OceanWell off the Coast of California in Federal Waters

Documents related to proposed NPDES Permit for Vessel Testing a Pilot OceanWell located off the coast of California in federal waters. The permit proposes to authorize freshwater and brine intermittent discharges from a desalination module into the Pacific