Water quality for ZIP code 96818
ZIP 96818 covers Hickam Housing, Urban Honolulu, and Halawa 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 |
|---|---|---|---|---|
| Tripler Army Medical Cntr Moanalua |
5,555 | 0 | 3.6 mi | |
| Fort Shafter |
7,067 | 0 | 3.9 mi | |
| Camp Stover Wahiawa |
595 | 0 | 4.0 mi | |
| Marine Corps Base Hawaii Kaneohe |
16,300 | 1 | 5.3 mi | |
| Waiawa Correctional Facility Waipahu |
444 | 0 | 5.3 mi | |
| Joint Base Pearl Harbor-Hickam Pearl Harbor |
65,230 | 1 | 5.5 mi | |
| Waipio Heights Waipio |
11,516 | 0 | 6.6 mi | |
| Barbers Point Waipahu-ewa-waianae |
5,256 | 0 | 8.2 mi | |
| Mililani Mililani Bws |
50,573 | 0 | 9.8 mi | |
| Waipahu-Ewa-Waianae Waipahu-ewa-waianae |
217,479 | 0 | 10.1 mi | |
| Aliamanu Salt Lake |
6,406 | 1 | 11.0 mi | |
| Kunia Village Wahiawa |
650 | 0 | 11.2 mi | |
| Wahiawa |
23,348 | 0 | 11.6 mi | |
| Nctams Eastpac Wahiawa |
6,470 | 0 | 11.9 mi | |
| Poamoho Wahiawa |
25 | 0 | 11.9 mi | |
| Schofield Barracks |
37,920 | 0 | 13.0 mi | |
| Waialua Sugar Pump 2 Waialua-haleiwa |
400 | 0 | 19.1 mi | |
| Waialua-Haleiwa Waialua-haleiwa |
9,996 | 0 | 20.1 mi | |
| Laie Water Company Laie |
5,577 | 0 | 20.8 mi | |
| Dillingham Airfield Mokuleia |
1,800 | 0 | 22.0 mi | |
| Waialee-Sunset Beach Sunset Beach |
4,916 | 0 | 22.3 mi | |
| Kahuku Kahuku |
2,730 | 0 | 22.9 mi | |
| Kahuku Air Base Kahuku Air Base |
75 | 0 | 23.3 mi | |
| Woodlands at Nuuanu Honolulu |
48 | 0 | 1209.1 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 |
|---|---|---|---|---|
|
Waimano Ridge Pearlridge |
545 | 0 | 0 | |
|
The Queen's Medical Center West Oahu Kunia |
800 | 0 | 0 | |
|
Mililani Memorial Park Mililani Bws |
100 | 0 | 0 | |
|
Punahou School Manoa |
4,000 | 0 | 0 | |
|
Sheraton Hotels |
2,830 | 1 | 0 | |
|
Palehua Solar Observatory Makakilo |
50 | 0 | 0 | |
|
ST Stephen's Diocesan Ctr Kaneohe |
45 | 1 | 0 | |
|
Navmag Lualualei Waianae |
114 | 0 | 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.