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Mid-Atlantic Air Quality
This page provides information on air quality, health effects, data, Region 3 areas not attaining clean air standards, ozone action programs, and more...
- Ozone and Particle Pollution Current Conditions for the DE/MD/PA/DC Area
- Ozone and Particle Pollution Current Conditions for Pennsylvania, Virginia
- How does EPA evaluate air quality?
- Clean Air Status of Region 3 Areas
- Useful Air Quality Links & Information
Particle and Ozone Pollution: Current Conditions for the southeastern Pennsylvania, Delaware, Maryland, and D.C. area
The following maps depict current particle and ozone pollution conditions for the southeastern Pennsylvania, Delaware, Maryland, and D.C. area. Be sure to check this page frequently since the maps are updated several times throughout the day. Use the "Refresh" button on your browser to retrieve the most recent version of these maps.
The first maps are typically available at approximately 9am EST. If a map shows "Currently Not Available" then no data is currently available and you should try checking this page again later.
Particles (PM2.5) Current Conditions
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| The first maps are typically available at approximately 9am EST. If the map indicates "Currently Not Available" then you can try checking this page again later. You may view the actual air pollution data used to generate these maps at EPA's AIRNow web site. |
Ground-Level Ozone Current Conditions
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| The first maps are typically available at approximately 9am EST. If the map indicates "Currently Not Available" then you can try checking this page again later. You may view the actual air pollution data used to generate these maps at EPA's AIRNow web site. |
How does EPA evaluate air quality?
EPA uses six "criteria pollutants" as indicators of air quality: ozone, carbon monoxide, nitrogen dioxide, sulfur dioxide, particulate matter and lead. For each of these, EPA has established "primary" standards to protect public health, and "secondary" standards to protect other aspects of public welfare, such as preventing materials damage, preventing crop and vegetation damage, or assuring visibility. These standards are called the National Ambient Air Quality Standards (NAAQS). In addition, EPA has issued an Air Quality Index which gives citizens critical Information to take necessary health precautions.
- National Ambient Air Quality Standards
- Federal Air Quality Index
- Health and Environmental Impacts of Air Pollution
Clean Air Status of Region 3 Areas (Attainment Status Designations)
- Ozone
- Particulate matter (PM2.5)
- Particulate matter (PM10) and sulfur dioxide (SO2)
- Nitrogen dioxide, carbon monoxide and lead
Useful Air Quality Links & Information
Air Quality Index, Local Forecasts
and Alerts
Monitoring, Emissions Data and Maps for Region 3 areas
Visualization tools for air quality analysts
- Air Quality Action Day Programs
- Human Health Research Program
- Interactive map showing air quality monitoring sites in Region 3
- Emissions Trends Reports
- Technical Analysis Tools - MIRA
- National Park Service
- Air Quality Data
- Regional Haze
- Air Quality Modeling
- Indoor Air Quality