Air Quality
Good
Water Violations
242
Active Contamination
1
Active Permits
4
Air quality in Delta County is rated good with a median AQI of 28 (117 days measured in 2025). 15 community water systems serve the area, with 242 recent violations in the last 5 years. 1 contamination site are tracked, all with completed or ongoing remediation.
Air Quality — Delta 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
97Ozone Daysi
0Drinking 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
15Active Systemsi
12Recent Violationsi
242Recent Violations (Last 5 Years)
BONE MESA DOMESTIC WD
BURGESS WATER COMPANY
FOOTHILLS #2 WATER COMPANY
GERMAN CREEK WEST WATER ASSOCIATION
HAMMOND PIPELINE
HIDDEN VALLEY HOA WATER COMPANY
MINNESOTA PIPELINE
NORTH FORK TRAILER AND RV PARK
PAONIA TOWN OF
PITKIN MESA PIPELINE CO
SOUTH LAMBORN MESA WATER COMPANY
STEWART MESA WC
WEST PAONIA DOMESTIC WATER COMPANY
WESTERN EXTENSION DOMESTIC WATER COMPANY
Industrial Monitoringi
Contamination 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.