Water quality in Grass Valley, California
Grass Valley is in Nevada County. 84 active public water systems serve the county; 21 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Nevada County
20 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Nevada ID E. George, Banner Mountain |
17,154 | 0 | 3.8 mi | |
| Rough & Ready Village |
154 | 1 | 3.8 mi | |
| Nevada ID Loma Rica |
14,072 | 0 | 4.0 mi | |
| Creekside Village |
300 | 0 | 4.9 mi | |
| Christian Encounter Ministries |
35 | 0 | 5.1 mi | |
| Sierra Estates Mutual Water Company |
100 | 2 | 5.2 mi | |
| Yulica |
25 | 0 | 5.2 mi | |
| City of Nevada City Nevada City |
3,148 | 0 | 6.0 mi | |
| Nevada ID Lake Wildwood |
9,108 | 0 | 6.6 mi | |
| Nevada ID Lake of Pines |
6,870 | 0 | 10.7 mi | |
| Washington Ridge C.c. |
70 | 1 | 11.4 mi | |
| Gold Country Home Park Water System |
60 | 0 | 12.1 mi | |
| Ananda Village |
226 | 0 | 12.4 mi | |
| Shady Lake Water Association |
90 | 0 | 12.4 mi | |
| Washington Water District |
330 | 3 | 20.2 mi | |
| Plavada Community Association |
126 | 0 | 35.6 mi | |
| Donner Summit Public Utility District |
98 | 0 | 40.1 mi | |
| Truckee-Donner Pud, Main |
36,730 | 0 | 48.5 mi | |
| Truckee-Donner Pud Hirschdale |
85 | 0 | 55.3 mi | |
| Floriston Water System |
110 | 3 | 58.6 mi |
Non-community systems in Nevada County (63: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Nevada County, nearest to Grass Valley 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.