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EPA Air Data

Description

Website providing access to air quality data collected at outdoor monitors across the US. Includes downloadable data files, map of monitor locations, visualization tools, and summary reports.

Questions this resource can help answer

What are recent and historical patterns of air quality?

How do I use this resource?

The download data section includes pre-generated data files that are updated twice a year. There are annual and daily summary data. Data is available from 1980 through 2025. Use the list at the top of the website to navigate to tables of files. Data visualization tools allow you to plot timeseries and tile plots of pollutant concentrations and AQI values for specific locations and years.

Pro tips

The tables of data are organized in different ways depending on the type of summarization. For example, annual summary data is available at the monitor, CBSA, and county levels. Daily summary data is available for gaseous pollutants and particulates.

Resource information

Resource owner

Government

Format

Website

Backup URL

Update Frequency

Annually

Geographic Coverage

United States

Technical specifications

Methodology

Ambient monitoring

Sectors

Other Specifications

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EPA Air Data

Description

Questions this resource can help answer

How do I use this resource?

Pro tips

Resource information

Technical specifications

Related resources

Hazardous Air Pollutant Exposure Model (HAPEM)

Human Exposure Model (HEM)

GEOS-Chem

Google Air Quality

New Jersey Environmental Justice, Mapping, Assessment, and Protection Tool

What’s in My Community?

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