Water quality for ZIP code 92678
ZIP 92678 covers Trabuco Canyon and Rancho Santa Margarita in Orange County, California, one of 88 ZIP codes in the county. 46 active public water systems serve the county; 6 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Orange County
39 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Santa Margarita Water District |
165,275 | 0 | 9.3 mi | |
| EL Toro Water District |
53,415 | 0 | 11.5 mi | |
| Irvine Ranch Water District |
450,323 | 0 | 12.0 mi | |
| Moulton Niguel Water District |
168,315 | 0 | 13.4 mi | |
| Santa Margarita Water District-Id9 San Juan Capistrano |
35,309 | 0 | 14.7 mi | |
| Golden State WC Cowan Heights |
7,006 | 0 | 15.6 mi | |
| Laguna Beach County WD |
18,862 | 0 | 16.5 mi | |
| East Orange County WD RZ |
3,464 | 0 | 16.6 mi | |
| City of Tustin Tustin |
65,143 | 0 | 17.0 mi | |
| East Orange County WD WZ |
0 | 0 | 17.4 mi | |
| City of San Clemente San Clemente |
51,545 | 0 | 17.4 mi | |
| South Coast Water District |
41,194 | 0 | 17.5 mi | |
| Smwd SJ Ground Water Plant |
0 | 0 | 17.5 mi | |
| Joint Regional Water Supply System |
0 | 0 | 18.5 mi | |
| Serrano Water District |
5,659 | 0 | 18.5 mi | |
| City of Orange Orange |
120,770 | 0 | 19.2 mi | |
| Yorba Linda Water District |
84,292 | 0 | 20.1 mi | |
| City of Newport Beach Newport Beach |
69,520 | 0 | 20.1 mi | |
| City of Santa Ana Santa Ana |
316,184 | 0 | 20.6 mi | |
| City of Anaheim Anaheim |
350,254 | 1 | 21.7 mi | |
| Mesa Water District |
110,000 | 0 | 22.1 mi | |
| Golden State WC Placentia/yorba Linda |
50,804 | 0 | 23.3 mi | |
| City of Fountain Valley Fountain Valley |
56,747 | 0 | 24.3 mi | |
| City of Brea Brea |
47,454 | 0 | 25.5 mi | |
| City of Garden Grove Garden Grove |
174,226 | 0 | 25.6 mi |
Non-community systems in Orange County (6: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Lazy W Ranch Water System |
63 | 0 | 0 | |
|
Smwd-Nichols Institute |
1,600 | 0 | 0 | |
|
Caspers Regional Wilderness Park |
239 | 0 | 0 | |
|
Canyon RV Park |
24 | 0 | 0 | |
|
Knott's Berry Farm |
3,000 | 0 | 0 | |
|
Los Alamitos Race Course |
1,600 | 1 | 1 |
About this data
Water systems are matched to Orange 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.
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.