Air Quality
Moderate
Water Violations
9
Active Permits
11
Air quality in Weld County is rated moderate with a median AQI of 52 (274 days measured in 2025). 2 community water systems serve the area, with 9 recent violations in the last 5 years.
Air Quality — Weld 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
78Ozone Daysi
194Drinking 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
2Active Systemsi
3Recent Violationsi
9Recent Violations (Last 5 Years)