Water quality for ZIP code 80104
ZIP 80104 covers Castle Rock in Douglas County, Colorado, one of 14 ZIP codes in the 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 |
|---|---|---|---|---|
| Consolidated Bell Mtn Ranch MD |
1,162 | 1 | 2.6 mi | |
| Larkspur Town of |
275 | 4 | 6.3 mi | |
| Perry Park Wsd |
3,890 | 3 | 8.1 mi | |
| Silver Heights Wsd |
301 | 0 | 8.8 mi | |
| Castle Pines Village MD |
5,656 | 1 | 10.6 mi | |
| Pinery Wwd |
12,901 | 1 | 10.9 mi | |
| Beverly Hills Mutual WC |
325 | 1 | 12.4 mi | |
| Castle Pines North MD |
12,800 | 1 | 12.7 mi | |
| Parker Wsd |
75,949 | 4 | 13.4 mi | |
| Thunderbird Wsd |
490 | 1 | 13.5 mi | |
| Sedalia Wsd |
215 | 1 | 13.6 mi | |
| Louviers Wsd |
238 | 3 | 15.7 mi | |
| Stonegate MD |
15,295 | 0 | 15.8 mi | |
| Meridian MD |
23,415 | 3 | 16.3 mi | |
| Highlands Ranch Wsd |
103,444 | 0 | 17.2 mi | |
| Roxborough Wsd |
13,765 | 0 | 17.4 mi | |
| Sierra Vista HOA |
120 | 0 | 17.6 mi | |
| Cottonwood Wsd |
10,867 | 7 | 17.6 mi | |
| Northern Douglas County Wsd |
6,160 | 0 | 17.8 mi | |
| Dominion Wsd Littleton |
0 | 0 | 17.9 mi | |
| Chatfield South WD |
312 | 0 | 19.6 mi | |
| View Ridge Mutual WC |
35 | 3 | 19.8 mi | |
| Westcreek Lakes WD |
165 | 8 | 21.3 mi | |
| Foxhill MD |
123 | 0 | 31.9 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, the county this ZIP code lies in, nearest to the ZIP code's centre 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.
ZIP code areas and town boundaries come from the U.S. Census Bureau's 2020 ZCTA 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.