Air Quality
Good
Water Violations
28
Active Contamination
71
Active Permits
22
Air quality in Hamilton County is rated good with a median AQI of 45 (181 days measured in 2025). 23 community water systems serve the area, with 28 recent violations in the last 5 years. 50 industrial facilities report toxic chemical releases totaling 959.5K lbs. 80 contamination sites are tracked, all with completed or ongoing remediation. 76 EV charging stations are available in the area.
Air Quality — Hamilton 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
124Ozone Daysi
57Drinking 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
23Active Systemsi
8Recent Violationsi
28Recent Violations (Last 5 Years)
Historical Violations (Over 5 Years Ago)
Industrial Monitoringi
Toxic Release Inventory (TRI)i
TRIContamination 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.
EV Charging & Alternative Fuel Stationsi
AFDC