Water quality for ZIP code 92378
ZIP 92378 covers Lake Arrowhead in San Bernardino County, California, one of 91 ZIP codes in the county. 321 active public water systems serve the county; 146 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 San Bernardino County
146 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Lacsd Rimforest |
717 | 0 | 0.3 mi | |
| Alpine Water Users Association |
2,534 | 0 | 1.1 mi | |
| Strawberry Lodge Mwc |
381 | 1 | 1.5 mi | |
| Dogwood Blue Jay Cyn Imp |
232 | 1 | 1.6 mi | |
| Clawa |
2,320 | 0 | 1.7 mi | |
| Upper Little Bear Mountain Club |
72 | 1 | 1.8 mi | |
| Arrowhead Villas Mutual Service Company |
2,644 | 0 | 2.6 mi | |
| Sky Forest Mwc |
492 | 2 | 2.9 mi | |
| Lake Arrowhead Csd |
7,038 | 0 | 3.0 mi | |
| Crestline Village Cwd Division 10 |
11,650 | 0 | 3.0 mi | |
| Deer Lodge Water System |
745 | 0 | 3.7 mi | |
| Camp Waterman Mwc |
55 | 1 | 3.9 mi | |
| Sbdno County Service Area 70 Cedar Glen |
1,240 | 1 | 4.0 mi | |
| Valley View Park Mwc |
499 | 1 | 4.5 mi | |
| Cdf Pilot Rock Conservation Camp |
65 | 1 | 4.6 mi | |
| Valley of Enchantment Mwc |
2,471 | 1 | 4.8 mi | |
| Smiley Park Country Club |
370 | 1 | 5.6 mi | |
| Cedarpines Park Mwc |
2,458 | 0 | 6.0 mi | |
| Running Springs Water District |
5,268 | 1 | 6.6 mi | |
| East Valley Water District |
108,600 | 0 | 7.2 mi | |
| Arrowbear Park Cwd |
1,396 | 0 | 8.2 mi | |
| Muscoy Mwc No. 1 |
13,000 | 1 | 8.6 mi | |
| Green Valley Mwc |
2,993 | 1 | 8.6 mi | |
| Gilbert Street Complex |
124 | 2 | 9.6 mi | |
| Devore WC |
1,574 | 0 | 10.5 mi |
Non-community systems in San Bernardino County (174: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to San Bernardino 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 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.