Air Quality
Good
Air quality in Chester County is rated good with a median AQI of 48 (249 days measured in 2007).
Air Quality — Chester County (2007)i
AQSThe Air Quality Index measures how clean or polluted the air is on a given day. AQI is reported at the county level. A score of 0-50 is considered good; 51-100 is moderate; above 100 may be unhealthy for sensitive groups.
Median AQI
PM2.5 Daysi
0Ozone Daysi
249