Air Quality
Good
Water Violations
4
Active Permits
10
Air quality in Madison County is rated good with a median AQI of 42 (273 days measured in 2025). 5 community water systems serve the area, with 4 recent violations in the last 5 years.
Air Quality — Madison 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
117Ozone Daysi
156Drinking 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
5Active Systemsi
5Recent Violationsi
4Recent Violations (Last 5 Years)
PENDLETON WATER COMPANY
Historical Violations (Over 5 Years Ago)
Industrial Monitoringi