Water quality in Makakilo, Hawaii
Makakilo 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 |
|---|---|---|---|---|
| Barbers Point Waipahu-ewa-waianae |
5,256 | 0 | 3.9 mi | |
| Waiawa Correctional Facility Waipahu |
444 | 0 | 5.2 mi | |
| Marine Corps Base Hawaii Kaneohe |
16,300 | 1 | 5.4 mi | |
| Aliamanu Salt Lake |
6,406 | 1 | 6.1 mi | |
| Kunia Village Wahiawa |
650 | 0 | 6.3 mi | |
| Waipio Heights Waipio |
11,516 | 0 | 6.8 mi | |
| Schofield Barracks |
37,920 | 0 | 8.5 mi | |
| Joint Base Pearl Harbor-Hickam Pearl Harbor |
65,230 | 1 | 9.0 mi | |
| Mililani Mililani Bws |
50,573 | 0 | 9.3 mi | |
| Wahiawa |
23,348 | 0 | 9.4 mi | |
| Nctams Eastpac Wahiawa |
6,470 | 0 | 10.0 mi | |
| Poamoho Wahiawa |
25 | 0 | 10.0 mi | |
| Tripler Army Medical Cntr Moanalua |
5,555 | 0 | 12.9 mi | |
| Waialua Sugar Pump 2 Waialua-haleiwa |
400 | 0 | 13.2 mi | |
| Fort Shafter |
7,067 | 0 | 13.7 mi | |
| Camp Stover Wahiawa |
595 | 0 | 13.8 mi | |
| Waialua-Haleiwa Waialua-haleiwa |
9,996 | 0 | 14.5 mi | |
| Dillingham Airfield Mokuleia |
1,800 | 0 | 15.1 mi | |
| Hnl-Windward-Pearl Harbor Honolulu-windward-pearlharbor |
631,389 | 0 | 17.5 mi | |
| Waialee-Sunset Beach Sunset Beach |
4,916 | 0 | 19.5 mi | |
| Laie Water Company Laie |
5,577 | 0 | 21.5 mi | |
| Kahuku Kahuku |
2,730 | 0 | 22.6 mi | |
| Kahuku Air Base Kahuku Air Base |
75 | 0 | 23.2 mi | |
| Woodlands at Nuuanu Honolulu |
48 | 0 | 1199.5 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 |
|---|---|---|---|---|
|
Palehua Solar Observatory Makakilo |
50 | 0 | 0 | |
|
The Queen's Medical Center West Oahu Kunia |
800 | 0 | 0 | |
|
Navmag Lualualei Waianae |
114 | 0 | 0 | |
|
Mililani Memorial Park Mililani Bws |
100 | 0 | 0 | |
|
Waimano Ridge Pearlridge |
545 | 0 | 0 | |
|
Punahou School Manoa |
4,000 | 0 | 0 | |
|
Sheraton Hotels |
2,830 | 1 | 0 | |
|
ST Stephen's Diocesan Ctr Kaneohe |
45 | 1 | 0 |
About this data
Water systems are matched to Honolulu County, nearest to Makakilo 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. Retrieved from ECHO on Oct 11, 2026.