What is PFAS?
Water suppliers
PFAS value per supplier, 2023–2025. EPA limit — 4 ppt (0.004 µg/L) for PFOA and PFOS, set in 2024. Suppliers that detected PFOA or PFOS
are highlighted and listed first. “Not detected” means the contaminant was measured but
not found.
| Supplier | City | Population | PFAS (ug/L) |
|---|---|---|---|
| Snake River Wd | Keystone | 9,900 | 0.0220 µg/L |
| Widefield Wsd | Colorado Springs | 27,640 | 0.0158 µg/L |
| Brighton City of | Brighton | 56,304 | 0.0106 µg/L |
| Mountain Village Town of | Redvale | 9,700 | 0.0075 µg/L |
| Thornton City of | Thornton | 226,465 | 0.0071 µg/L |
| Todd Creek Village Md | Brighton | 7,363 | 0.0068 µg/L |
| Cherokee Md | Colorado Springs | 29,610 | 0.0061 µg/L |
| Stonegate Md | Parker | 15,295 | 0.0056 µg/L |
| Parker Wsd | Parker | 75,949 | 0.0048 µg/L |
| Little Thompson Wd | Berthoud | 25,654 | 0.0048 µg/L |
| Arapahoe Cnty Wwwa | Centennial | 31,000 | 0.0046 µg/L |
| Gunnison City of | Gunnison | 9,610 | 0.0042 µg/L |
| Rocky Ford City of | Rocky Ford | 4,443 | 0.0041 µg/L |
| Englewood City of | Englewood | 57,332 | 0.0040 µg/L |
| Cottonwood Wsd | — | 10,867 | 0.0040 µg/L |
| Denver Water Board | Denver | 1,287,000 | Not detected |
| Aurora City of | — | 533,407 | Not detected |
| Colorado Springs Utilities | Colorado Springs | 464,111 | Not detected |
| Westminster City of | Westminster | 202,078 | Not detected |
| Ft Collins City of | Fort Collins | 179,901 | Not detected |
| Arvada City of | Arvada | 171,610 | Not detected |
| Boulder City of | Boulder | 166,080 | Not detected |
| Greeley City of | Greeley | 132,310 | Not detected |
| Pueblo Board of Ww | Pueblo | 114,070 | Not detected |
| Castle Rock Town of | Castle Rock | 110,298 | Not detected |
| Broomfield City and County of | Broomfield | 106,153 | Not detected |
| Longmont City of | Longmont | 104,178 | Not detected |
| Highlands Ranch Wsd | Highlands Ranch | 103,444 | Not detected |
| Ute Wcd | Grand Junction | 92,580 | Not detected |
| Loveland City of | Loveland | 91,077 | Not detected |
| Consolidated Mutual Maple Grove | Lakewood | 81,400 | Not detected |
| South Adams County Wsd | Commerce City | 75,559 | Not detected |
| East Cherry Creek Valley Wsd | — | 66,130 | Not detected |
| Ft Collins Loveland Wd | Fort Collins | 63,532 | Not detected |
| Eagle River Wsd | Vail | 51,515 | Not detected |
| Northglenn City of | Northglenn | 48,927 | Not detected |
| Us Department of the Army Fort Carson | Fort Carson | 48,000 | Not detected |
| Erie Town of | — | 47,444 | Not detected |
| Golden City of | Golden | 38,288 | Not detected |
| Canon City City of | Canon City | 34,800 | Not detected |
| Clifton Wd | Clifton | 34,500 | Not detected |
| Durango City of | Durango | 33,787 | Not detected |
| Aspen City of | Aspen | 31,100 | Not detected |
| Pueblo West Md | Pueblo West | 30,000 | Not detected |
| Lafayette City of | Lafayette | 28,700 | Not detected |
| Breckenridge Town of | Breckenridge | 28,315 | Not detected |
| East Larimer County Wd | Fort Collins | 27,944 | Not detected |
| Firestone Town of | Firestone | 27,798 | Not detected |
| Csu Main and West Housing Campus | Fort Collins | 27,375 | Not detected |
| Johnstown Town of | — | 27,295 | Not detected |
| Grand Junction City of | Grand Junction | 26,000 | Not detected |
| Fountain City of | Fountain | 25,130 | Not detected |
| Windsor Town of | — | 23,500 | Not detected |
| Meridian Md | — | 23,415 | Not detected |
| Louisville City of | Louisville | 20,975 | Not detected |
| Tri County Wcd | Montrose | 20,490 | Not detected |
| Left Hand Wd | Niwot | 20,280 | Not detected |
| Security Water District | Colorado Springs | 20,000 | Not detected |
| Evans City of | Evans | 19,369 | Not detected |
| Montrose City of | Montrose | 19,305 | Not detected |
| Mt Werner Wd | Steamboat Springs | 19,000 | Not detected |
| Woodmoor Wsd | Monument | 18,031 | Not detected |
| Superior Md No 1 | Superior | 17,900 | Not detected |
| Frederick Town of | Frederick | 17,173 | Not detected |
| Us Air Force Academy | Usaf Academy | 16,876 | Not detected |
| Estes Park Town of | Estes Park | 16,722 | Not detected |
| North Weld County Wd | Lucerne | 15,890 | Not detected |
| Evergreen Md | Evergreen | 15,750 | Not detected |
| Gypsum Town of | Gypsum | 15,272 | Not detected |
| Black Hawk City of | Black Hawk | 15,167 | Not detected |
| Sterling City of | Sterling | 15,100 | Not detected |
| Berthoud Town of | Berthoud | 14,211 | Not detected |
| Woodmen Hills Md | Falcon | 13,888 | Not detected |
| Montezuma Wc | Dolores | 13,797 | Not detected |
| Roxborough Wsd | Littleton | 13,765 | Not detected |
| Pinery Wwd | Parker | 12,901 | Not detected |
| Castle Pines North Md | — | 12,800 | Not detected |
| Meridian Service Md | Peyton | 12,760 | Not detected |
| Ft Lupton City of | Fort Lupton | 12,099 | Not detected |
| Ft Morgan City of | Fort Morgan | 12,000 | Not detected |
| Severance Town of | Severance | 11,733 | Not detected |
| Wellington Town of | Wellington | 11,720 | Not detected |
| Federal Heights City of | Federal Heights | 11,678 | Not detected |
| Trinidad City of | Trinidad | 11,400 | Not detected |
| Alamosa City of | Alamosa | 11,271 | Not detected |
| Pagosa Area Wsd | Pagosa Springs | 11,069 | Not detected |
| Idaho Springs City of | Idaho Springs | 10,432 | Not detected |
| North Table Mountain Wsd | Golden | 10,000 | Not detected |
| Steamboat Springs City of | Steamboat Springs | 9,950 | Not detected |
| Morrison Town of | Morrison | 9,887 | Not detected |
| St Charles Mesa Wd | Pueblo | 9,690 | Not detected |
| Rifle City of | Rifle | 9,489 | Not detected |
| Glenwood Springs City of | — | 9,428 | Not detected |
| Milliken Town of | Milliken | 9,200 | Not detected |
| Craig City of | Craig | 8,930 | Not detected |
| Cortez City of | Cortez | 8,770 | Not detected |
| Delta City of | — | 8,700 | Not detected |
| Woodland Park City of | Woodland | 8,500 | Not detected |
| Silverthorne Town of | Silverthorne | 8,400 | Not detected |
| La Junta City of | La Junta | 8,320 | Not detected |