County drinking water records
Honolulu County, HI drinking water systems
20 community water systems serve Honolulu County, HI, reporting 1,102,978 people served in all. A system that also serves other counties counts all of its customers here.
None of them had a health-based violation in the last 10 years.
20 rely mainly on groundwater, counting water bought from other systems.
Their lead service line inventories list 0 lead lines, 90 galvanized lines that must be replaced and 1,598 lines of unknown material.
10 more systems are placed in Honolulu County, HI by the county their records name because they have no service area map that lines up with their own records, so they are listed apart and not counted here.
- Community water systems
- 20
- People served, sum of each system's own figure
- 1,102,978
- Systems with a health-based violation, last 10 years
- 0
- Systems with one unresolved
- 2
- Lead service lines in inventories
- 0
Water systems serving Honolulu County
20 systemsPeople served is each system's own figure for its whole service area. Violation counts cover the last 10 years of EPA records.
| System | Serves | People served | Main source | Health-based violations, 10 years | Unresolved | Lead lines |
|---|---|---|---|---|---|---|
| HNL-Windward-Pearl Harbor | Urban Honolulu, East Honolulu and 14 more | 631,389 | Groundwater | 0 | 0 | 0 |
| Waipahu-Ewa-Waianae | Kapolei, Waianae and 16 more | 217,479 | Groundwater | 0 | 0 | 0 |
| Joint Base Pearl Harbor-Hickam | Pearl City | 65,230 | Groundwater | 0 | 1 | 0 |
| Mililani | Mililani Mauka and Mililani Town | 50,573 | Groundwater | 0 | 0 | 0 |
| Schofield Barracks | Schofield Barracks | 37,920 | Groundwater | 0 | 0 | 0 |
| Wahiawa | Wahiawa, Wheeler AFB and 1 more | 23,348 | Groundwater | 0 | 0 | 0 |
| Marine Corps Base Hawaii | Ewa Gentry and Kaneohe | 16,300 | Purchased groundwater | 0 | 0 | 0 |
| Waipio Heights | Waipio and Mililani Town | 11,516 | Groundwater | 0 | 0 | 0 |
| Waialua-Haleiwa | Haleiwa, Waialua and 1 more | 9,996 | Groundwater | 0 | 0 | 0 |
| Fort Shafter | Urban Honolulu | 7,067 | Groundwater | 0 | 0 | 0 |
| Aliamanu | Outside cities and towns | 6,406 | Purchased groundwater | 0 | 1 | 0 |
| Laie Water Company | Laie and Hauula | 5,577 | Groundwater | 0 | 0 | 0 |
| Tripler Army Medical CNTR | Urban Honolulu | 5,555 | Groundwater | 0 | 0 | 0 |
| Barbers Point | Kalaeloa | 5,256 | Groundwater | 0 | 0 | 0 |
| Waialee-Sunset Beach | Pupukea | 4,916 | Groundwater | 0 | 0 | 0 |
| Kahuku | Kahuku | 2,730 | Groundwater | 0 | 0 | 0 |
| Kunia Village | Wahiawa and land outside it | 650 | Groundwater | 0 | 0 | 0 |
| Camp Stover | Urban Honolulu and Wahiawa | 595 | Purchased groundwater | 0 | 0 | 0 |
| Waialua Sugar Pump 2 | Waialua | 400 | Groundwater | 0 | 0 | 0 |
| Kahuku Air Base | Kahuku | 75 | Groundwater | 0 | 0 | 0 |
Systems placed by county record in Honolulu County
10 systemsEPA has no service area map for these systems. They are placed by the county their records name (the counties EPA lists them serving, or the county coded in their IDs where EPA lists none), and without a map they are not counted in the figures above.
| System | Serves | People served | Main source | Health-based violations, 10 years | Unresolved | Lead lines |
|---|---|---|---|---|---|---|
| Nctams Eastpac | County on record | 6,470 | Groundwater | 0 | 0 | 0 |
| Kamehameha Schools | County on record | 4,000 | Groundwater | 0 | 0 | 0 |
| The Queen's Medical Center | County on record | 3,440 | Groundwater | 0 | 0 | 0 |
| Dillingham Airfield | County on record | 1,800 | Groundwater | 0 | 0 | 0 |
| Waiawa Correctional Facility | County on record | 444 | Surface water | 5 | 0 | 0 |
| Waiahole | County on record | 300 | Groundwater | 1 | 0 | 0 |
| Dillingham Ranch | County on record | 100 | Groundwater | 0 | 0 | 0 |
| Woodlands at Nuuanu | County on record | 48 | Purchased groundwater | 0 | 0 | 0 |
| Villa Rose | County on record | 30 | Groundwater | 1 | 0 | 0 |
| Poamoho | County on record | 25 | Groundwater | 0 | 0 | 0 |
Cities and towns in Honolulu County
48 places- Ahuimanu1 system
- Aiea1 system
- East Honolulu1 system
- East Kapolei1 system
- Ewa Beach1 system
- Ewa Gentry2 systems
- Ewa Villages1 system
- Halawa1 system
- Haleiwa1 system
- Hauula1 system
- Heeia1 system
- Hickam Housing1 system
- Kahaluu1 system
- Kahuku2 systems
- Kailua1 system
- Kalaeloa1 system
- Kaneohe1 system
- Kaneohe Base1 system
- Kapolei1 system
- Ko Olina1 system
- Laie1 system
- Maili1 system
- Makaha1 system
- Makaha Valley1 system
- Makakilo1 system
- Maunawili1 system
- Mililani Mauka1 system
- Mililani Town2 systems
- Mokuleia1 system
- Nanakuli1 system
- Ocean Pointe1 system
- Pearl City2 systems
- Pupukea1 system
- Royal Kunia1 system
- Schofield Barracks1 system
- Urban Honolulu4 systems
- Wahiawa1 system
- Waialua2 systems
- Waianae1 system
- Waikele1 system
- Waimalu1 system
- Waimanalo1 system
- Waimanalo Beach1 system
- Waipahu1 system
- Waipio2 systems
- West Loch Estate1 system
- Wheeler AFB1 system
- Whitmore Village1 system
Counties come from the counties EPA lists each system serving, matched to 2024 Census counties; where EPA lists none, from the county coded in the system's ID, its service area map, or its mailing address. A county holding at least a fifth of a system's service area map is added when at least a fifth of that map lies in those counties. Towns are the ones EPA lists and the Census places such a map covers, always inside those counties. In New England, where EPA's town names a whole Town, it is not matched to the village of the same name. A system is not listed in a county holding less than a fifth of its map, or in a county or town its map reaches when the map lies mostly outside the counties EPA lists, so a page can leave out a system that serves part of the area. Methodology and limitations