• Organization: U.S. Environmental Protection Agency
• Updated: 2015-07-01T00:00:00.000+00:00

This web service contains the following layers: PM2.5 Annual 1997 NAAQS State Level and PM2.5 Annual 1997 NAAQS National . It also contains the following tables:...

• Organization: U.S. Environmental Protection Agency
• Updated: 2015-07-01T00:00:00.000+00:00

This web service contains the following layer: PM2.5 Annual 2012 NAAQS State Level. Full FGDC metadata records for each layer may be found by clicking the layer name at the web service endpoint...

• Organization: Department of Transportation
• Updated: 2025-12-13T00:00:00.000+00:00

The Nonattainment Area - Particulate Matter-2.5 Annual (1997) dataset was updated on November 30, 2025 by the Environmental Protection Agency (EPA) and is part of the U.S. Department of...

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• Organization: District of Columbia
• Updated: 2025-07-16T00:00:00.000Z

To better understand the current air quality status in the District, the following summary highlights key pollutants and their compliance with the National Ambient Air Quality Standards (NAAQS)....

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• Organization: U.S. Environmental Protection Agency
• Updated: 2016-08-09

This data describe the abundance of individual lichen species across the U.S. as recorded in the Forest Health and Monitoring dataset of the Forest Inventory and Analysis program (i.e. Phase 3...

• Organization: U.S. Environmental Protection Agency
• Updated: 2015-07-01T00:00:00.000+00:00

This web service contains the following layers: Lead NAA 2008 NAAQS and Lead NAA Centroids 2008 NAAQS. Full FGDC metadata records for each layer may be found by clicking the layer name at the web...

• Organization: U.S. Environmental Protection Agency
• Updated: 2015-07-01T00:00:00.000+00:00

This web service contains the following layers: Ozone 1997 NAAQS NAA State Level and Ozone 1997 NAAQS NAA National Level. Full FGDC metadata records for each layer may be found by clicking the...

• Organization: U.S. Environmental Protection Agency
• Updated: 2015-07-01T00:00:00.000+00:00

This web service contains the following layers: PM2.5 24hr 2006 NAAQS State Level and PM2.5 24hr 2006 NAAQS National. Full FGDC metadata records for each layer may be found by clicking the layer...

• Organization: U.S. Environmental Protection Agency
• Updated: 2015-07-01T00:00:00.000+00:00

This web service contains the following layers: Ozone 2008 NAAQS NAA State Level and Ozone 2008 NAAQS NAA National Level. Full FGDC metadata records for each layer may be found by clicking the...

• Organization: Department of Transportation
• Updated: 2025-12-13T00:00:00.000+00:00

The Nonattainment Area - Particulate Matter-2.5 (2012) dataset was updated on November 30, 2025 by the Environmental Protection Agency (EPA) and is part of the U.S. Department of Transportation...

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• Organization: Department of Transportation
• Updated: 2025-12-13T00:00:00.000+00:00

The Nonattainment Area - Particulate Matter- 10 (1987) dataset was updated on November 30, 2025 by the Environmental Protection Agency (EPA) and is part of the U.S. Department of Transportation...

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• Organization: U.S. Environmental Protection Agency
• Updated: 2015-07-01T00:00:00.000+00:00

This web service layer, Carbon Monoxide (1990 NAAQS), displays identified state level areas where carbon monoxide pollution has not met the National Ambient Air Quality Standards (NAAQS)...

• Organization: U.S. Environmental Protection Agency
• Updated: 2015-07-01T00:00:00.000+00:00

This web service contains the following layer: PM10 Nonattainment Areas (1987 NAAQS). Full FGDC metadata records for each layer may be found by clicking the layer name at the web service endpoint...

• Organization: U.S. Environmental Protection Agency
• Updated: 2015-07-01T00:00:00.000+00:00

This web service contains the following layer: SO2 2010 NAAQS State Level. Full FGDC metadata records for each layer may be found by clicking the layer name at the web service endpoint...

• Organization: U.S. Environmental Protection Agency
• Updated: 2015-07-01T00:00:00.000+00:00

This web service contains the following state level layers:Ozone 8-hr (1997 standard), Ozone 8-hr (2008 standard), Lead (2008 standard), SO2 1-hr (2010 standard), PM2.5 24hr (2006 standard), PM2.5...

• Organization: U.S. Environmental Protection Agency
• Updated: 2015-07-01T00:00:00.000+00:00

This downloadable data package contains the following state level layers: Ozone 8-hr (1997 standard), Ozone 8-hr (2008 standard), Lead (2008 standard), SO2 1-hr (2010 standard), PM2.5 24hr (2006...

• Organization: U.S. Environmental Protection Agency
• Updated: 2015-07-01T00:00:00.000+00:00

This web service layer, Ozone 8-hr (2015 standard), displays identified state level areas where ground-level ozone have not met the National Ambient Air Quality Standards (NAAQS) established in...

• Organization: U.S. Environmental Protection Agency
• Updated: 2014-01-01

The Office of Air and Radiation's (OAR) Ambient Air Quality Data (Current) contains ambient air pollution data collected by EPA, other federal agencies, as well as state, local, and tribal air...