AirData Pre-Generated Data Files (ambient air quality monitoring)
U.S. Environmental Protection Agency (EPA), Air Quality System (AQS)
- License
- Public domain
- Commercial
- Yes
- Format
- CSV
- Coverage
- United States and territories (air monitoring sites)
- Last updated
- Added to findgis 31 Oct 2026 · Update frequency Irregular
Tags
Files update twice a year: June for the prior year, and December for the summer ozone season. The record runs from 1980.
Source and attribution
- Publisher
- U.S. Environmental Protection Agency (EPA), Air Quality System (AQS)
- License
- Public domain
- Commercial use
- Yes
- Attribution required
- No
- Modification allowed
- See publisher
- Redistribution allowed
- See publisher
- Share-alike
- No
- Region
- United StatesUS
- Type
- Vector
- Time
- 1980–2025
- Download
- Annual concentration by monitor, 2025 (ZIP of CSV, 3.8 MB)Monitoring site list with coordinates (ZIP of CSV, 1.0 MB)
- Extent
- -179.217.6-64.571.4West, south, east, north. Approximate region extent.
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