Air Quality
Good
Water Violations
27
Active Contamination
21
Active Permits
16
Air quality in Kane County is rated good with a median AQI of 46 (273 days measured in 2025). 10 community water systems serve the area, with 27 recent violations in the last 5 years. 102 contamination sites are tracked, including 17 open leaking tank incidents.
Air Quality — Kane County (2025)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
142Ozone Daysi
131Drinking Wateri
SDWISPublic water systems registered to serve this area. Community systems (CWS) provide water to residents year-round. Violations indicate a system failed to meet federal drinking water standards.
Community Systemsi
10Active Systemsi
13Recent Violationsi
27Recent Violations (Last 5 Years)
PRAIRIE PATH WATER COMPANY-CLARENDON
RECOVERY CENTERS OF AMERICA
ST CHARLES
HIGHLAND SUBDIVISION
PRAIRIE PATH WATER COMPANY-FERSON CREEK
IL YOUTH CENTER ST CHARLES
Historical Violations (Over 5 Years Ago)
Industrial Monitoringi
Wastewater & Stormwater Permits (NPDES)i
NPDESContamination Sitesi
Contaminated sites tracked by the EPA and state agencies. Superfund sites are the most seriously contaminated locations. Brownfields are former industrial properties being cleaned up for reuse. LUST sites have confirmed leaks from underground storage tanks.