Air Quality
Moderate
Water Violations
274
Air quality in Maricopa County is rated moderate with a median AQI of 71 (304 days measured in 2025). 23 community water systems serve the area, with 274 recent violations in the last 5 years.
Air Quality — Maricopa 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
37Ozone Daysi
190Drinking 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
23Recent Violationsi
274Recent Violations (Last 5 Years)
LIVCO WATER COMPANY
CLEAR SPRINGS UTILITY MAIN
NACO WATER CO MAIN
EAST SLOPE WATER COMPANY
CLEAR SPRINGS UTILITY WELL 6
MESCAL LAKES WATER SYSTEM
EAST SLOPE WATER - WEST
NACO WATER CO BISBEE
HACIENDA DEL SOL MHP
WALNUT CREEK WATER COMPANY
MOUNTAIN GLEN WATER SERVIC LINDEN TRAILS
SUNLAND WATER COMPANY
BACA FLOAT WATER COMPANY
CROWN KING WATER COMPANY
Historical Violations (Over 5 Years Ago)