Water quality for ZIP code 96791
ZIP 96791 covers Mokuleia, Waialua, and Haleiwa in Honolulu County, Hawaii, one of 38 ZIP codes in the county. 38 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 Honolulu County
29 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Dillingham Airfield Mokuleia |
1,800 | 0 | 1.4 mi | |
| Waialua Sugar Pump 2 Waialua-haleiwa |
400 | 0 | 3.9 mi | |
| Schofield Barracks |
37,920 | 0 | 9.3 mi | |
| Kunia Village Wahiawa |
650 | 0 | 10.7 mi | |
| Aliamanu Salt Lake |
6,406 | 1 | 10.8 mi | |
| Waialee-Sunset Beach Sunset Beach |
4,916 | 0 | 11.0 mi | |
| Wahiawa |
23,348 | 0 | 11.5 mi | |
| Nctams Eastpac Wahiawa |
6,470 | 0 | 11.6 mi | |
| Poamoho Wahiawa |
25 | 0 | 11.6 mi | |
| Mililani Mililani Bws |
50,573 | 0 | 13.5 mi | |
| Waipahu-Ewa-Waianae Waipahu-ewa-waianae |
217,479 | 0 | 13.7 mi | |
| Waipio Heights Waipio |
11,516 | 0 | 15.4 mi | |
| Waiawa Correctional Facility Waipahu |
444 | 0 | 16.7 mi | |
| Kahuku Kahuku |
2,730 | 0 | 16.8 mi | |
| Kahuku Air Base Kahuku Air Base |
75 | 0 | 17.4 mi | |
| Joint Base Pearl Harbor-Hickam Pearl Harbor |
65,230 | 1 | 17.5 mi | |
| Laie Water Company Laie |
5,577 | 0 | 17.5 mi | |
| Barbers Point Waipahu-ewa-waianae |
5,256 | 0 | 18.3 mi | |
| Marine Corps Base Hawaii Kaneohe |
16,300 | 1 | 19.4 mi | |
| Tripler Army Medical Cntr Moanalua |
5,555 | 0 | 23.4 mi | |
| Fort Shafter |
7,067 | 0 | 24.9 mi | |
| Camp Stover Wahiawa |
595 | 0 | 25.6 mi | |
| Hnl-Windward-Pearl Harbor Honolulu-windward-pearlharbor |
631,389 | 0 | 27.6 mi | |
| Woodlands at Nuuanu Honolulu |
48 | 0 | 1188.5 mi | |
| Kamehameha Schools Kapalama |
4,000 | 0 | — |
Non-community systems in Honolulu County (8: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Navmag Lualualei Waianae |
114 | 0 | 0 | |
|
Palehua Solar Observatory Makakilo |
50 | 0 | 0 | |
|
Mililani Memorial Park Mililani Bws |
100 | 0 | 0 | |
|
The Queen's Medical Center West Oahu Kunia |
800 | 0 | 0 | |
|
Waimano Ridge Pearlridge |
545 | 0 | 0 | |
|
Punahou School Manoa |
4,000 | 0 | 0 | |
|
ST Stephen's Diocesan Ctr Kaneohe |
45 | 1 | 0 | |
|
Sheraton Hotels |
2,830 | 1 | 0 |
About this data
Water systems are matched to Honolulu 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 or the centre of the first town EPA lists the system as serving, from Census Bureau county subdivision 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 Hawaii 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.