Water quality in Mammoth Lakes, California
Mammoth Lakes is in Mono County. 91 active public water systems serve the county; 12 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 Mono County
17 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| June Lake Pud Down Canyon |
310 | 1 | 11.8 mi | |
| June Lake Pud Village |
263 | 1 | 11.9 mi | |
| Crowley Lake Trailer Park |
230 | 1 | 14.0 mi | |
| Mountain Meadows Mwc |
525 | 0 | 14.3 mi | |
| Crowley Lake Mutual Water Company |
175 | 0 | 14.3 mi | |
| Birchim Community Service District |
150 | 0 | 17.4 mi | |
| Wheeler Crest Csd |
86 | 0 | 21.4 mi | |
| Lower Rock Creek Mutual Water Co. |
310 | 1 | 23.2 mi | |
| Lee Vining Public Utility District |
222 | 0 | 24.0 mi | |
| Lundy Mutual Water Company |
200 | 0 | 30.1 mi | |
| Chalfant Valley West M.w.c. |
45 | 0 | 34.1 mi | |
| Cold Water Canyon Mwc |
65 | 0 | 36.7 mi | |
| White Mountain Mutual Water Company |
142 | 0 | 40.5 mi | |
| Bridgeport Pud |
374 | 3 | 44.8 mi | |
| Usmc/mtn Warfare Trng Ctr Bridgeport |
300 | 1 | 58.2 mi | |
| Sierra East HOA |
84 | 1 | 68.4 mi | |
| Usmc Housing Coleville |
424 | 3 | 72.5 mi |
Non-community systems in Mono County (73: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Mono County, nearest to Mammoth Lakes 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.
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 California 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.