Skip to main content
U.S. flag

An official website of the United States government

Here’s how you know

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

HTTPS

Secure .gov websites use HTTPS
A lock (LockA locked padlock) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Emergency

This is not the current EPA website. To navigate to the current EPA website, please go to www.epa.gov. This website is historical material reflecting the EPA website as it existed on January 19, 2025. This website is no longer updated and links to external websites and some internal pages may not work. More information »

    • Environmental Topics
    • Air
    • Bed Bugs
    • Cancer
    • Chemicals, Toxics, and Pesticide
    • Climate Change
    • Emergency Response
    • Environmental Information by Location
    • Environmental Justice
    • Greener Living
    • Health
    • Land, Waste, and Cleanup
    • Lead
    • Mold
    • Radon
    • Research
    • Science Topics
    • Water Topics
    • A-Z Topic Index
    • Laws & Regulations
    • By Business Sector
    • By Topic
    • Compliance
    • Enforcement
    • Laws and Executive Orders
    • Regulations
    • Report a Violation
    • Environmental Violations
    • Fraud, Waste or Abuse
    • About EPA
    • Our Mission and What We Do
    • Headquarters Offices
    • Regional Offices
    • Labs and Research Centers
    • Planning, Budget, and Results
    • Organization Chart
    • EPA History
    • Staff Directory

Breadcrumb

  1. Home
  2. Air Emissions Monitoring Knowledge Base

Technical Air Pollution Resources

National Ambient Air Quality Standards (NAAQS)

  • Scientific and technical information about NAAQS reviews
    • ​​​​​​​​​​​​​​​​​​​​​​​​​​​​This site provides scientific and technical information about current and prior reviews of the six common air pollutants.

Air Modeling

  • Support Center for Regulatory Atmospheric Modeling (SCRAM)
    • Atmospheric dispersion models that support Clean Air Act regulatory programs.

Air Monitoring

  • Air Quality System (AQS)
    • AQS provides data from thousands of ambient air monitors, meteorological data, and data quality assurance/quality control information.
  • Ambient Monitoring Technology Information Center (AMTIC)
    • ​​​​​​​AMTIC has information on ambient air quality monitoring programs, monitoring methods, quality assurance and control procedures, and federal regulations related to ambient air quality monitoring.

Air Emissions

  • Air Emissions Measurement Center (EMC)
    • EMC provides information on test methods for measuring air pollutants from smokestacks and other industrial sources.
  • Clean Air Technology Center (CATC)
    • ​​​​​​​​​​​​​​​​​​​​​​​​​​​​CATC provides access to resources about air pollution prevention and control technologies, including the RACT/BACT/LAER Clearinghouse.
  • Clearinghouse for Inventories and Emissions Factors (CHIEF)
    • ​​​​​​​​​​​​​​CHIEF provides information on air emissions inventories and modeling, emissions factors, electronic reporting and the emissions monitoring knowledge base.

Analyzing Air Pollution Impacts and Control

  • Air Quality Analysis
    • AQA provides the documented analyses that support the NAAQS Review process, as well as other documented analyses of special interest.
  • Economic and Cost Analysis (ECAS) for Air Pollution Regulations
    • ECAS provides tools, including databases and models, for analyzing costs, benefits, and economic impacts of air quality management strategies, programs, and regulations.
  • Fate, Exposure, and Risk Analysis (FERA)
    • ​​​​​​​​​​​​​​FERA provides tools used to evaluate the health risks and environmental effects associated with exposure to criteria air pollutants and toxic air pollutants.

Related Information

  • Clean Air Act
  • Criteria Air Pollutants
  • Hazardous Air Pollutants
  • Permitting Under the Clean Air Act
  • Visibility and Haze

Air Emissions Monitoring Knowledge Base

  • Basic Information about Air Emissions Monitoring
    • Technical Air Pollution Resources
  • Air Emissions Monitoring for Permits
  • Compliance Assurance Monitoring
  • Monitoring by Control Technique
    • Activated Carbon Adsorber
    • Capture Systems
    • Catalytic Oxidizer
    • Compliant (Low/No VOC/HAP) Inks and Coatings
    • Condenser
    • Cyclone
    • Electrified Filter Bed
    • Electrostatic Precipitator
    • Fabric Filter
    • Thermal Oxidizer
    • Wet Scrubber for Gaseous Control
    • Wet Scrubber for Particulate Matter
  • Monitoring Information by Industry - Printing and Publishing
Contact Us about Air Emissions Monitoring Knowledge Base
Contact Us about Air Emissions Monitoring Knowledge Base to ask a question, provide feedback, or report a problem.
Last updated on October 2, 2024
  • Assistance
  • Ayuda
  • Arabic
  • Chinese (simplified)
  • Chinese (traditional)
  • Aide
  • Asistans
  • Korean
  • Assistência
  • Russian
  • Tulong
  • Vietnamese
United States Environmental Protection Agency

Discover.

  • Accessibility Statement
  • Budget & Performance
  • Contracting
  • EPA www Web Snapshot
  • Grants
  • No FEAR Act Data
  • Plain Writing
  • Privacy
  • Privacy and Security Notice

Connect.

  • Data
  • Inspector General
  • Jobs
  • Newsroom
  • Regulations.gov
  • Subscribe
  • USA.gov
  • White House

Ask.

  • Contact EPA
  • EPA Disclaimers
  • Hotlines
  • FOIA Requests
  • Frequent Questions

Follow.