US counties by median Air Quality Index (US EPA), 2011
Riverside County 93, the highest of 1047 counties, 2011
- Under 34
- 34 to 40
- 40 to 44
- 44 to 48
- 48 to 54
- 54 and over
- No data
Boundaries: U.S. Census Bureau cartographic boundary files.
Riverside County 93, the highest of 1047 counties, 2011
Boundaries: U.S. Census Bureau cartographic boundary files.