Water quality for ZIP code 90720
ZIP 90720 covers Los Alamitos, Rossmoor, Cypress, and Seal Beach 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 Seal Beach Seal Beach |
24,937 | 0 | 2.9 mi | |
| City of la Palma La Palma |
15,948 | 0 | 3.8 mi | |
| Hynes Estates Mutual Water Co. |
168 | 1 | 4.2 mi | |
| City of Westminster Westminster |
93,591 | 0 | 4.9 mi | |
| Midway City Mutual WC Midway City |
1,305 | 0 | 5.4 mi | |
| City of Buena Park Buena Park |
82,667 | 0 | 5.4 mi | |
| Eastside Water Association |
2,000 | 1 | 5.6 mi | |
| South Midway City Mutual Water Co. Midway City |
891 | 0 | 5.7 mi | |
| City of Garden Grove Garden Grove |
174,226 | 0 | 6.0 mi | |
| Page Avenue Mutual Water Company |
119 | 2 | 7.1 mi | |
| Liberty Park Water Association |
95 | 3 | 7.4 mi | |
| City of Huntington Beach Huntington Beach |
201,000 | 0 | 7.7 mi | |
| City of Fountain Valley Fountain Valley |
56,747 | 0 | 8.7 mi | |
| City of Fullerton Fullerton |
140,054 | 0 | 9.9 mi | |
| City of Santa Ana Santa Ana |
316,184 | 0 | 11.1 mi | |
| City of la Habra La Habra |
61,202 | 0 | 11.2 mi | |
| City of Anaheim Anaheim |
350,254 | 1 | 12.1 mi | |
| Mesa Water District |
110,000 | 0 | 12.4 mi | |
| Golden State WC Placentia/yorba Linda |
50,804 | 0 | 13.1 mi | |
| City of Orange Orange |
120,770 | 0 | 13.4 mi | |
| City of Brea Brea |
47,454 | 0 | 14.5 mi | |
| Serrano Water District |
5,659 | 0 | 14.6 mi | |
| City of Tustin Tustin |
65,143 | 0 | 14.6 mi | |
| East Orange County WD RZ |
3,464 | 0 | 15.4 mi | |
| Golden State WC Cowan Heights |
7,006 | 0 | 16.3 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 |
|---|---|---|---|---|
|
Los Alamitos Race Course |
1,600 | 1 | 1 | |
|
Knott's Berry Farm |
3,000 | 0 | 0 | |
|
Canyon RV Park |
24 | 0 | 0 | |
|
Smwd-Nichols Institute |
1,600 | 0 | 0 | |
|
Lazy W Ranch Water System |
63 | 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.