Air Quality
Moderate
Water Violations
None
Active Contamination
217
Active Permits
16
Air quality in Marion County is rated moderate with a median AQI of 53 (305 days measured in 2025). 0 community water systems serve the area with a clean compliance record. 50 industrial facilities report toxic chemical releases totaling 1.3M lbs. 230 contamination sites are tracked, all with completed or ongoing remediation. 100 EV charging stations are available in the area.
Air Quality — Marion 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
240Ozone Daysi
63Drinking 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
0Active Systemsi
4Recent Violationsi
0Industrial Monitoringi
Toxic Release Inventory (TRI)i
TRIWastewater & 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.
EV Charging & Alternative Fuel Stationsi
AFDC