Datasets / Climate & environment
Air quality
Annual fine particulate (PM2.5) and ozone concentrations from EPA's regulatory monitors, and a 0–100 Criterra index combining them (100 = cleanest). Only counties with a monitor have values.
- 3
- measures
- 903
- counties with data
- —
- county level only
Open PM2.5 (Annual Mean) on the map →
Measures
| Measure | Unit | Geography |
|---|---|---|
| PM2.5 (Annual Mean) | µg/m³ | Counties |
| Ozone (Annual Mean) | ppb | Counties |
| Air Quality Index | 0–100 score | Counties |
Source
- Air Quality System annual summary data, 2023U.S. Environmental Protection Agency · Public domain