Water quality for ZIP code 90631
ZIP 90631 covers La Habra, La Habra Heights, Rowland Heights, Fullerton, and Hacienda Heights 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
Your location is within the outer bounds of this system's EPA service area.
Other community water systems in Orange County
39 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| City of Fullerton Fullerton |
140,054 | 0 | 4.3 mi | |
| City of Brea Brea |
47,454 | 0 | 5.1 mi | |
| Page Avenue Mutual Water Company |
119 | 2 | 6.0 mi | |
| City of Buena Park Buena Park |
82,667 | 0 | 6.6 mi | |
| Golden State WC Placentia/yorba Linda |
50,804 | 0 | 6.9 mi | |
| City of la Palma La Palma |
15,948 | 0 | 8.7 mi | |
| City of Anaheim Anaheim |
350,254 | 1 | 9.0 mi | |
| Hynes Estates Mutual Water Co. |
168 | 1 | 10.5 mi | |
| Golden State WC West Orange County |
114,693 | 0 | 10.7 mi | |
| Yorba Linda Water District |
84,292 | 0 | 10.7 mi | |
| City of Garden Grove Garden Grove |
174,226 | 0 | 11.3 mi | |
| City of Orange Orange |
120,770 | 0 | 11.8 mi | |
| Serrano Water District |
5,659 | 0 | 11.9 mi | |
| City of Westminster Westminster |
93,591 | 0 | 13.4 mi | |
| Eastside Water Association |
2,000 | 1 | 13.5 mi | |
| Midway City Mutual WC Midway City |
1,305 | 0 | 13.6 mi | |
| South Midway City Mutual Water Co. Midway City |
891 | 0 | 14.0 mi | |
| East Orange County WD RZ |
3,464 | 0 | 14.5 mi | |
| City of Seal Beach Seal Beach |
24,937 | 0 | 14.7 mi | |
| City of Santa Ana Santa Ana |
316,184 | 0 | 14.8 mi | |
| Golden State WC Cowan Heights |
7,006 | 0 | 15.5 mi | |
| City of Tustin Tustin |
65,143 | 0 | 15.7 mi | |
| City of Fountain Valley Fountain Valley |
56,747 | 0 | 16.0 mi | |
| Liberty Park Water Association |
95 | 3 | 16.5 mi | |
| City of Huntington Beach Huntington Beach |
201,000 | 0 | 17.3 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 |
|---|---|---|---|---|
|
Knott's Berry Farm |
3,000 | 0 | 0 | |
|
Los Alamitos Race Course |
1,600 | 1 | 1 | |
|
Canyon RV Park |
24 | 0 | 0 | |
|
Lazy W Ranch Water System |
63 | 0 | 0 | |
|
Smwd-Nichols Institute |
1,600 | 0 | 0 | |
|
Caspers Regional Wilderness Park |
239 | 0 | 0 |
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.