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Environment · EPA AirData

Compare two counties

Pick a county for each column. Bars share one scale across the gutter, so a longer bar is literally more bad-air days. Each county is also flagged against the national county - the typical monitored county's 1 bad-air days, median AQI 40.

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Riverside California
Bad-air days147
worse than national
Good days (AQI 0-50)43
worse than national
Median AQI87
worse than national
Peak AQI213
Top pollutant Ozone
San Bernardino California
Bad-air days144
worse than national
Good days (AQI 0-50)40
worse than national
Median AQI87
worse than national
Peak AQI593
Top pollutant Ozone
Los Angeles California
Bad-air days133
worse than national
Good days (AQI 0-50)38
worse than national
Median AQI80
worse than national
Peak AQI230
Top pollutant Ozone
Tulare California
Bad-air days111
worse than national
Good days (AQI 0-50)76
worse than national
Median AQI71
worse than national
Peak AQI185
Top pollutant Ozone
Kern California
Bad-air days94
worse than national
Good days (AQI 0-50)76
worse than national
Median AQI72
worse than national
Peak AQI177
Top pollutant Ozone
Fresno California
Bad-air days79
worse than national
Good days (AQI 0-50)71
worse than national
Median AQI67
worse than national
Peak AQI169
Top pollutant Ozone
Maricopa Arizona
Bad-air days73
worse than national
Good days (AQI 0-50)33
worse than national
Median AQI77
worse than national
Peak AQI261
Top pollutant Ozone
Pinal Arizona
Bad-air days70
worse than national
Good days (AQI 0-50)77
worse than national
Median AQI77
worse than national
Peak AQI337
Top pollutant PM10
Riverside California
Bad-air days147
worse than national
Good days (AQI 0-50)43
worse than national
Median AQI87
worse than national
Peak AQI213
Top pollutant Ozone
San Bernardino California
Bad-air days144
worse than national
Good days (AQI 0-50)40
worse than national
Median AQI87
worse than national
Peak AQI593
Top pollutant Ozone
Los Angeles California
Bad-air days133
worse than national
Good days (AQI 0-50)38
worse than national
Median AQI80
worse than national
Peak AQI230
Top pollutant Ozone
Tulare California
Bad-air days111
worse than national
Good days (AQI 0-50)76
worse than national
Median AQI71
worse than national
Peak AQI185
Top pollutant Ozone
Kern California
Bad-air days94
worse than national
Good days (AQI 0-50)76
worse than national
Median AQI72
worse than national
Peak AQI177
Top pollutant Ozone
Fresno California
Bad-air days79
worse than national
Good days (AQI 0-50)71
worse than national
Median AQI67
worse than national
Peak AQI169
Top pollutant Ozone
Maricopa Arizona
Bad-air days73
worse than national
Good days (AQI 0-50)33
worse than national
Median AQI77
worse than national
Peak AQI261
Top pollutant Ozone
Pinal Arizona
Bad-air days70
worse than national
Good days (AQI 0-50)77
worse than national
Median AQI77
worse than national
Peak AQI337
Top pollutant PM10

Bars use one shared scale across both columns. Each county is flagged against the national county independently - no fabricated pairwise verdicts. All figures are real EPA AirData aggregates; see HANDOFF.md.