Science & Technology

Control of Air Pollution from New Motor Vehicles: Heavy-Duty Engine and Vehicle Standards - Supporting Testing, Research and Modeling

This page contains links to some testing, research, and modeling used to inform EPA’s proposed rule, Control of Air Pollution from New Motor Vehicles: Heavy-Duty Engine and Vehicle Standards.

Frequent Questions related to Transportation, Air Pollution, and Climate Change

Frequently asked questions and answers that are received by EPA's Office of Transportation and Air Quality.

2015 Municipal Solid Waste New Source Performance Standards (NSPS) and Emission Guidelines (EG) Data Files

The following are 2015 data files related to the Municipal Solid Waste Landfills: New Source Performance Standards (NSPS), Emission Guidelines (EG) rules.

2016 Municipal Solid Waste New Source Performance Standards (NSPS) and Emission Guidelines (EG) Data Files

The following are 2016 data files related to the Municipal Solid Waste Landfills: New Source Performance Standards (NSPS), Emission Guidelines (EG) rules.

Atmospheric Research Related to CASTNET

Monitoring programs that utilize similar methods as CASTNET

Responses to 40 CFR Part 75 Petitions - 2025

Petition responses in 2025.

Historical Rulemakings

Archive of listing of Federal Register notices and links to more information for each rulemaking action related to EPA's Greenhouse Gas Reporting Program.

Wildfire Smoke and Your Patients' Health

This wildfire smoke course is intended to help health care professionals, nurses, and asthma educators understand the health effects associated with wildfire smoke and steps to advise patients to take to reduce exposure both before or during a wildfire.

The EPA’s Ongoing Efforts to Reduce Nutrient Pollution

EPA’s Efforts to Reduce Nutrient Pollution - An overview of what the EPA is doing to combat the nitrogen and phosphorus pollution problems in the U.S.

Frequent Questions About eGRID

eGRID is a comprehensive source of data on the environmental characteristics of almost all electric power generated in the United States. eGRID is based on available plant-specific data for all U.S. electricity generating plants that report data.