Honolulu County, Hawaii Water Systems

Honolulu County, Hawaii

47 community water systems on record — 30 active, 17 inactive.

Every active community water system nationwide must produce a Consumer Confidence Report under the EPA's revised rule, effective for reports due July 1, 2027.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 2026. This is a record-keeping and public-information tool — it does not replace Hawaii’s official records. Always confirm current status with Hawaii before making decisions based on this information.

Community water systems in Honolulu County, Hawaii

System name	City	Population served	Status
ALIAMANU	SCHOFIELD BARRACKS	6,406	Active
BARBERS POINT	WAIKOLOA	5,256	Active
BOARD OF WATER SUPPLY	—	47,500	Inactive
CAMP STOVER	JBPPH	595	Active
DILLINGHAM AIRFIELD	HONOLULU	1,800	Active
DILLINGHAM RANCH	BEVERLY HILLS	100	Active
EWA VILLAGES	—	1,144	Inactive
FORT KAMEHAMEHA	—	100	Inactive
FORT SHAFTER	SCHOFIELD BARRACKS	7,067	Active
GERALD KREMKOW	—	25	Inactive
HAWAII STATE HOSPITAL	—	3,000	Inactive
HNL-WINDWARD-PEARL HARBOR	HONOLULU	631,389	Active
JOINT BASE PEARL HARBOR-HICKAM	JBPPH	65,230	Active
KAHANA VALLEY STATE PARK	—	42	Inactive
KAHUKU	HONOLULU	2,730	Active
KAHUKU AIR BASE	KAHUKU	75	Active
KAHUKU HOUSING CORPORATION	—	1,000	Inactive
KAMEHAMEHA SCHOOLS	HONOLULU	4,000	Active
KIPAPA ACRES C.P.R.	AIEA	43	Inactive
KUNIA VILLAGE	KUNIA	650	Active
LAIE WATER COMPANY	LAIE	5,577	Active
MAKAHA VALLEY	—	300	Inactive
MALAEKAHANA	—	100	Inactive
MARINE CORPS BASE HAWAII	KANEOHE BAY	16,300	Active
MASS TRANSIT LINES	—	400	Inactive
MILILANI	HONOLULU	50,573	Active
MOKULEIA ASSOCIATES	—	150	Inactive
NCTAMS EASTPAC	JBPPH	6,470	Active
OAHU SUGAR WAIPAHU	—	212	Inactive
POAMOHO	HONOLULU	25	Active
RADFORD TERRACE	—	1,500	Inactive
SCHOFIELD BARRACKS	SCHOFIELD BARRACKS	37,920	Active
THE QUEEN'S MEDICAL CENTER	HONOLULU	3,440	Active
TRIPLER ARMY MEDICAL CNTR	SCHOFIELD BARRACKS	5,555	Active
VILLA ROSE	WAILUKU	30	Active
WAHIAWA	HONOLULU	23,348	Active
WAIAHOLE	HONOLULU	300	Active
WAIALEE-SUNSET BEACH	HONOLULU	4,916	Active
WAIALUA SUGAR CO.	—	60	Inactive
WAIALUA SUGAR PUMP 2	WAHIAWA	400	Active
WAIALUA SUGAR PUMP 3	—	240	Inactive
WAIALUA-HALEIWA	HONOLULU	9,996	Active
WAIAWA CORRECTIONAL FACILITY	PEARL CITY	444	Active
WAIPAHU-EWA-WAIANAE	HONOLULU	217,479	Active
WAIPIO HEIGHTS	HONOLULU	11,516	Active
WHEELER	—	389	Inactive
WOODLANDS AT NUUANU	HONOLULU	48	Active