The EPA uses a variety of methods to gather information on air pollution from vehicle exhausts, power plants, industrial facilities and small businesses. Models, sampling, emissions tests and release reports all contribute to the Agency's ability to protect the nation's environmental health, set achievable goals and develop new initiatives for combating pollution. Once it has gathered and compiled this information, the Agency makes it available to the public through the Toxics Release Inventory, National Emission Inventory, the Aerometric Information Retrieval System and other sources.

Recommended EPA Web pages

• Air Pollution Monitoring
  This site provides information and links to about air pollution monitoring in order to improve air quality.
• Technology Transfer Network: Ambient Monitoring Technology Information Center
  Contains information on ambient air quality monitoring.
• Clean Air Markets - Programs and Regulations: Emissions Monitoring
  EPA's Clean Air Market Programs collect data from regulated electric generation facilities.

Air Pollution
Certification Programs, Community Involvement, Industrial Air Pollution, New Source Review, Research, State Implementation Plans, Stationary Sources, Testing, Transboundary Pollution, Urban Air Pollution

Air Pollution Control
Abatement, Remediation, Treatment

Air Pollution Effects
Acid Rain, Climate Change, Economic Effects, Environmental Effects, Global Warming, Health Effects, Heat Island Effect, Risk Assessment

Air Pollution Legal Aspects
Compliance, Enforcement, Guidance, Legislation, Permits, Public Comment, Regulations, Reporting, Standards

Air Quality
Air Quality Criteria, Attainment, Early Action Compacts, Emission Factor, Emission Inventory, Emissions, Emissions Measurement, Emissions Trading, Measurement, Models, Monitoring, Nonattainment

Atmosphere
Carbon Sequestration, Climate Change, Global Warming, Ground Level Ozone, Ozone Depletion, Ozone Layer, Ozone Monitoring, Ozone Transport, Smog, Ultraviolet Radiation (UV)

Indoor Air Pollution
Building Related Illness, Carbon Monoxide, Environmental Tobacco Smoke, Fireplaces, Mercury, Mold, Radon, Sick Building Syndrome, Stoves, Vermiculite, World Trade Center Dust Cleanup

Mobile Sources
Airplanes, Automobiles, Diesels, Engines, Fuels, Inspection and Maintenance, Lawn and Garden Equipment, Locomotives, Marine Engines, Motorcycles, Trucks and Buses, Used Oil Recycling, Vehicle Emissions