State
Colorado: drinking water records
EPA lists 1,108 community water systems serving homes in Colorado. 158 took part in EPA's national PFAS survey (UCMR 5), and 37 found at least one PFAS above the level laboratories can measure.
In focus1,108community water systems
Public records. Clearer context.
0
ZIP reports published
1,108
community water systems
389
systems with a health-based violation since 2016
79
systems that reached the lead action level since 2016
Counties
- Adams County 66 systems
- Alamosa County 4 systems
- Arapahoe County 29 systems
- Archuleta County 7 systems
- Baca County 6 systems
- Bent County 4 systems
- Boulder County 42 systems
- Broomfield County 3 systems
- Chaffee County 19 systems
- Cheyenne County 3 systems
- Clear Creek County 13 systems
- Conejos County 11 systems
- Costilla County 8 systems
- Crowley County 8 systems
- Custer County 3 systems
- Delta County 32 systems
- Denver County 6 systems
- Dolores County 2 systems
- Douglas County 29 systems
- Eagle County 27 systems
- El Paso County 72 systems
- Elbert County 16 systems
- Fremont County 14 systems
- Garfield County 57 systems
- Gilpin County 3 systems
- Grand County 26 systems
- Gunnison County 20 systems
- Hinsdale County 2 systems
- Huerfano County 15 systems
- Jackson County 2 systems
- Jefferson County 46 systems
- Kiowa County 5 systems
- Kit Carson County 7 systems
- La Plata County 54 systems
- Lake County 6 systems
- Larimer County 48 systems
- Las Animas County 16 systems
- Lincoln County 6 systems
- Logan County 8 systems
- Mesa County 13 systems
- Mineral County 3 systems
- Moffat County 5 systems
- Montezuma County 13 systems
- Montrose County 21 systems
- Morgan County 8 systems
- Otero County 24 systems
- Ouray County 7 systems
- Park County 11 systems
- Phillips County 3 systems
- Pitkin County 27 systems
- Prowers County 11 systems
- Pueblo County 17 systems
- Rio Blanco County 6 systems
- Rio Grande County 10 systems
- Routt County 23 systems
- Saguache County 5 systems
- San Juan County 2 systems
- San Miguel County 13 systems
- Sedgwick County 5 systems
- Summit County 23 systems
- Teller County 24 systems
- Washington County 3 systems
- Weld County 57 systems
- Yuma County 6 systems
ZIP reports
Sources
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Page generated 2026-09-03.