Water quality for ZIP code 87931
ZIP 87931 covers Oasis and Caballo in Sierra County, New Mexico, one of 9 ZIP codes in the county. 21 active public water systems serve the county; 11 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Sierra County
5 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Hillsboro Mdwca Hillsboro |
172 | 2 | 8.6 mi | |
| Truth or Consequences Truth Or Consequences |
6,783 | 2 | 16.1 mi | |
| Desertaire Water Company Truth Or Consequences |
45 | 5 | 19.0 mi | |
| Elephant Butte Water System Elephant Butte |
2,286 | 0 | 19.4 mi | |
| Elephant Butte, City of Elephant Butte |
1,350 | 0 | 21.2 mi |
Non-community systems in Sierra County (15: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Lakeview RV Park Caballo |
66 | 2 | 0 | |
|
Caballo Lake RV Park Caballo |
25 | 1 | 0 | |
|
Caballo Lakeside Campground-State Parks Caballo |
25 | 0 | 0 | |
|
Caballo Riverside Campground-State Park Caballo |
25 | 0 | 0 | |
|
Percha Dam State Park Caballo |
25 | 0 | 0 | |
|
Desert View RV Park Elephant Butte |
220 | 1 | 0 | |
|
Dam Site Historic District Elephant Butte |
98 | 0 | 0 | |
|
South Monticello Recreation Area Elephant Butte |
25 | 1 | 0 | |
|
Bureau of Reclamation Truth Or Consequences |
25 | 2 | 0 | |
|
Truth or Consequences Municipal Airport Truth Or Consequences |
40 | 0 | 0 | |
|
Rock Canyon Recreation Area Elephant Butte |
33 | 1 | 0 | |
|
Monticello Canyon Dwca Elephant Butte |
63 | 1 | 1 | |
|
Monticello RV Park Elephant Butte |
25 | 3 | 2 | |
|
Spaceport America Truth Or Consequences |
25 | 0 | 0 | |
|
National Rcs Test Facility Tularosa |
100 | 0 | 0 |
About this data
Water systems are matched to Sierra 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 New Mexico 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.