Water quality in Lone Tree, Colorado
Lone Tree is in Douglas County. 74 active public water systems serve the county; 39 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 Douglas County
28 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Meridian MD |
23,415 | 3 | 1.6 mi | |
| Stonegate MD |
15,295 | 0 | 3.7 mi | |
| Northern Douglas County Wsd |
6,160 | 0 | 3.8 mi | |
| Beverly Hills Mutual WC |
325 | 1 | 3.8 mi | |
| Castle Pines North MD |
12,800 | 1 | 4.2 mi | |
| Cottonwood Wsd |
10,867 | 7 | 4.7 mi | |
| Highlands Ranch Wsd |
103,444 | 0 | 5.0 mi | |
| Sierra Vista HOA |
120 | 0 | 6.1 mi | |
| Castle Pines Village MD |
5,656 | 1 | 6.3 mi | |
| Silver Heights Wsd |
301 | 0 | 7.4 mi | |
| Sedalia Wsd |
215 | 1 | 7.7 mi | |
| Louviers Wsd |
238 | 3 | 8.1 mi | |
| Pinery Wwd |
12,901 | 1 | 8.6 mi | |
| Dominion Wsd Littleton |
0 | 0 | 9.8 mi | |
| Chatfield South WD |
312 | 0 | 10.2 mi | |
| View Ridge Mutual WC |
35 | 3 | 10.2 mi | |
| Castle Rock Town of |
110,298 | 1 | 11.1 mi | |
| Roxborough Wsd |
13,765 | 0 | 11.3 mi | |
| Thunderbird Wsd |
490 | 1 | 11.8 mi | |
| Consolidated Bell Mtn Ranch MD |
1,162 | 1 | 15.7 mi | |
| Foxhill MD |
123 | 0 | 16.0 mi | |
| Perry Park Wsd |
3,890 | 3 | 19.8 mi | |
| Larkspur Town of |
275 | 4 | 20.7 mi | |
| Westcreek Lakes WD |
165 | 8 | 31.0 mi | |
| Sterling Ranch Cab |
11,501 | 2 | — |
Non-community systems in Douglas County (45: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Douglas County, nearest to Lone Tree 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.