Water quality in Urban Honolulu, Hawaii
Urban Honolulu is in Honolulu 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 |
|---|---|---|---|---|
| Camp Stover Wahiawa |
595 | 0 | 2.3 mi | |
| Fort Shafter |
7,067 | 0 | 2.4 mi | |
| Tripler Army Medical Cntr Moanalua |
5,555 | 0 | 3.9 mi | |
| Joint Base Pearl Harbor-Hickam Pearl Harbor |
65,230 | 1 | 9.9 mi | |
| Marine Corps Base Hawaii Kaneohe |
16,300 | 1 | 11.2 mi | |
| Waiawa Correctional Facility Waipahu |
444 | 0 | 11.3 mi | |
| Waipio Heights Waipio |
11,516 | 0 | 11.9 mi | |
| Barbers Point Waipahu-ewa-waianae |
5,256 | 0 | 14.1 mi | |
| Mililani Mililani Bws |
50,573 | 0 | 14.2 mi | |
| Wahiawa |
23,348 | 0 | 16.3 mi | |
| Waipahu-Ewa-Waianae Waipahu-ewa-waianae |
217,479 | 0 | 16.3 mi | |
| Nctams Eastpac Wahiawa |
6,470 | 0 | 16.4 mi | |
| Poamoho Wahiawa |
25 | 0 | 16.4 mi | |
| Aliamanu Salt Lake |
6,406 | 1 | 16.6 mi | |
| Kunia Village Wahiawa |
650 | 0 | 16.6 mi | |
| Schofield Barracks |
37,920 | 0 | 18.1 mi | |
| Laie Water Company Laie |
5,577 | 0 | 22.7 mi | |
| Waialua Sugar Pump 2 Waialua-haleiwa |
400 | 0 | 24.2 mi | |
| Waialua-Haleiwa Waialua-haleiwa |
9,996 | 0 | 25.0 mi | |
| Kahuku Kahuku |
2,730 | 0 | 25.1 mi | |
| Kahuku Air Base Kahuku Air Base |
75 | 0 | 25.4 mi | |
| Waialee-Sunset Beach Sunset Beach |
4,916 | 0 | 25.9 mi | |
| Dillingham Airfield Mokuleia |
1,800 | 0 | 27.3 mi | |
| Woodlands at Nuuanu Honolulu |
48 | 0 | 1215.1 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 |
|---|---|---|---|---|
|
Punahou School Manoa |
4,000 | 0 | 0 | |
|
Sheraton Hotels |
2,830 | 1 | 0 | |
|
ST Stephen's Diocesan Ctr Kaneohe |
45 | 1 | 0 | |
|
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 | |
|
Palehua Solar Observatory Makakilo |
50 | 0 | 0 | |
|
Navmag Lualualei Waianae |
114 | 0 | 0 |
About this data
Water systems are matched to Honolulu County, nearest to Urban Honolulu 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.
Town locations and ZIP code areas come from U.S. Census Bureau 2020 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.