Air Quality in Delaware

Delaware has 3 counties with EPA air quality monitoring. Air quality is stable across the state, with an average of 264 "Good" days per county per year. The best air quality is in Sussex (median AQI 40) and the most polluted is New Castle (median AQI 43).

County	Median AQI	Max AQI	Good Days	Unhealthy Days	Trend	Top Pollutant
Kent	41	100	250	0	→ stable	Ozone
New Castle	43	119	246	4	→ stable	Ozone
Sussex	40	90	298	0	→ stable	Ozone