Water quality in Thornton, Colorado
Thornton is in Adams County. 89 active public water systems serve the county; 40 had an EPA violation in the past three years.
Most likely your provider
Your location is within the outer bounds of this system's EPA service area.
Other community water systems in Adams County
63 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Friendly Village of the Rockies |
1,046 | 4 | 2.2 mi | |
| The Grove at Alta Ridge Thornton |
1,300 | 0 | 2.4 mi | |
| Redwood Estates Thornton |
1,500 | 0 | 2.4 mi | |
| Avilla Eastlake Thornton |
410 | 6 | 2.5 mi | |
| Chaparral Village MHP Thornton |
303 | 1 | 2.5 mi | |
| Thornton Estates Thornton |
300 | 1 | 2.5 mi | |
| Thornton City of |
226,465 | 2 | 2.5 mi | |
| Woodland Hills MHC Thornton |
1,740 | 0 | 2.7 mi | |
| Denver Cascade MHP |
1,200 | 2 | 2.8 mi | |
| Lamplighter MHP |
651 | 1 | 2.8 mi | |
| Federal Heights City of |
11,678 | 0 | 2.9 mi | |
| Kimberly Hills MHP |
2,005 | 3 | 2.9 mi | |
| Westminster City of |
202,078 | 1 | 4.1 mi | |
| Hazeltine Heights Water |
261 | 0 | 4.5 mi | |
| North Washington Street Wsd |
14,500 | 0 | 4.5 mi | |
| Riverdale Peaks II MD |
209 | 0 | 4.9 mi | |
| Crestview Wsd |
23,756 | 0 | 5.4 mi | |
| High Plains Wua |
200 | 0 | 5.6 mi | |
| North Pecos Wsd |
2,500 | 0 | 5.9 mi | |
| Mile High WC |
700 | 4 | 6.4 mi | |
| Hope Ditch CO |
63 | 1 | 7.2 mi | |
| Tucson WC |
90 | 2 | 7.4 mi | |
| Todd Creek Village MD |
7,363 | 0 | 7.8 mi | |
| HI Land Acres Wsd |
350 | 0 | 8.3 mi | |
| Creekside South Estates Metro District |
160 | 4 | 8.4 mi |
Non-community systems in Adams County (25: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Northglenn Moose Lodge NO2166 |
55 | 1 | 1 | |
|
Joseph T Ryerson and Son INC |
44 | 0 | 0 | |
|
Adams County Parks |
868 | 3 | 1 | |
|
Johnson Auto Plaza |
247 | 0 | 0 | |
|
Petrocco Farms |
42 | 0 | 0 | |
|
Wagon Wheel Skating Rink |
153 | 0 | 0 | |
|
Colorado Rifle Club Brighton |
50 | 0 | 0 | |
|
Colorado Interstate Gas Watkins |
45 | 0 | 0 | |
|
BP Wattenberg Gas Plant |
41 | 0 | 0 | |
|
Watkins Square |
515 | 2 | 0 | |
|
Colorado Air and Space Port |
140 | 0 | 0 | |
|
Copeland Enterprises, Inc. Watkins |
104 | 0 | 0 | |
|
Rocky Mountain Rail Park Watkins |
65 | 0 | 0 | |
|
Mountain View Fellowship |
447 | 0 | 0 | |
|
Barr Lake State Park |
609 | 0 | 0 | |
|
Elmwood Baptist Academy School |
450 | 0 | 0 | |
|
Buffalo Run Golf Course |
240 | 1 | 0 | |
|
Flatrock Training Center WS |
204 | 0 | 0 | |
|
Hideaway Steakhouse |
150 | 0 | 0 | |
|
Sunmart 525 |
100 | 0 | 0 | |
|
Riverdale Animal Shelter |
62 | 0 | 0 | |
|
Lulus Inn |
57 | 0 | 0 | |
|
Country Manor Motel |
37 | 1 | 0 | |
|
E-470 Water System Plaza D |
25 | 5 | 0 | |
|
City of Aurora at Front Range Airport |
0 | 0 | 0 |
About this data
Water systems are matched to Adams County, nearest to Thornton first. Your exact provider depends on your address and connection; the largest community water system in a county is usually the city or town utility. Distances are measured to the centre of the service area EPA publishes for the system or, for systems without one, to the centre of the first town EPA lists the system as serving, from Census Bureau place files.
Town locations and ZIP code areas come from U.S. Census Bureau 2020 files.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Colorado records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.