U.S. water systems

Hawaii Water Systems

Hawaii

178 community water systems on record — 118 active, 60 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.

Counties in Hawaii

Hawaii County (49)Honolulu County (47)Kauai County (27)Maui County (38)

All community water systems in Hawaii

System name	City	Population served	Status
ALIAMANU	SCHOFIELD BARRACKS	6,406	Active
ANAHOLA	LIHUE	2,473	Active
ANAHOLA FARM LOTS	LIHUE	385	Active
ANINI	LIHUE	174	Active
BALDWIN RANCH ESTATES	PUKALANI	32	Active
BARBERS POINT	WAIKOLOA	5,256	Active
BOARD OF WATER SUPPLY	—	47,500	Inactive
CAMP STOVER	JBPPH	595	Active
DAVIES-HAMAKUA SUGAR CO	—	48	Inactive
DAVIES-HAMAKUA SUGAR CO	—	200	Inactive
DAVIES-HAMAKUA SUGAR CO	—	102	Inactive
DAVIES-HAMAKUA SUGAR CO	—	25	Inactive
DILLINGHAM AIRFIELD	HONOLULU	1,800	Active
DILLINGHAM RANCH	BEVERLY HILLS	100	Active
DOW KALAHEO TREATMENT PLANT	—	370	Inactive
EWA VILLAGES	—	1,144	Inactive
FORT KAMEHAMEHA	—	100	Inactive
FORT SHAFTER	SCHOFIELD BARRACKS	7,067	Active
GAY & ROBINSON	KAUMAKANI	1,271	Active
GAY & ROBINSON	—	186	Inactive
GERALD KREMKOW	—	25	Inactive
HAENA-WAINIHA	LIHUE	833	Active
HAIKU TOWN WATER ASSOCIATION, INC.	KAHULUI	20	Active
HAINA	HILO	4,563	Active
HAKALAU	—	45	Inactive
HAKALAU-WAILEA	HILO	402	Active
HALAULA	—	606	Inactive
HALEAKALA NATIONAL PARK	MAKAWAO	1,200	Active
HANA	WAILUKU	1,284	Active
HANA WATER SYSTEMS - NORTH	HANA	160	Active
HANA WATER SYSTEMS - SOUTH	HANA	816	Active
HANALEI	LIHUE	500	Active
HANAPEPE-ELEELE	LIHUE	5,592	Active
HAWAII STATE HOSPITAL	—	3,000	Inactive
HAWAII VOLCANOES NAT.PARK	HAWAII NATIONAL PARK	4,201	Active
HAWAIIAN BEACHES	PAHOA	3,546	Active
HAWAIIAN COMMERCIAL & SUGAR CO	—	312	Inactive
HAWAIIAN COMMERCIAL & SUGAR CO	—	114	Inactive
HAWAIIAN OCEAN VIEW ESTATES	HILO	1,000	Active
HAWAIIAN SHORES	PAHOA	1,360	Active
HICKAM	HICKAM AFB	12,853	Inactive
HILO	HILO	39,477	Active
HNL-WINDWARD-PEARL HARBOR	HONOLULU	631,389	Active
HOKU'ULA WATER SYSTEM	—	1,000	Active
HONOKOHAU	WAILUKU	42	Active
HONOMU	HILO	645	Active
HOOLEHUA	KAUNAKAKAI	2,400	Active
JOINT BASE PEARL HARBOR-HICKAM	JBPPH	65,230	Active
KAANAPALI	WAIKOLOA	8,000	Active
KAHAKULOA WATER CO.	WAILUKU	150	Active
KAHANA VALLEY STATE PARK	—	42	Inactive
KAHILI MOUNTAIN PARK	KOLOA	175	Active
KAHUKU	HONOLULU	2,730	Active
KAHUKU AIR BASE	KAHUKU	75	Active
KAHUKU HOUSING CORPORATION	—	1,000	Inactive
KAILUA	PUUNENE	90	Active
KALAE	WAILUKU	360	Active
KALAHEO-KOLOA	LIHUE	12,660	Active
KALAPANA	HILO	275	Active
KALAUPAPA NHP	KALAUPAPA	110	Active
KALUAKOI	—	700	Inactive
KAMEHAMEHA SCHOOLS	HONOLULU	4,000	Active
KAPALUA	KAPALUA	4,200	Active
KAPEHU	—	128	Inactive
KAPOHO	HILO	340	Inactive
KAUAULA	—	120	Inactive
KAUNAKAKAI	WAILUKU	3,702	Active
KAUPULEHU	KAILUA-KONA	1,945	Active
KAWAIHAE UNIT #1	KAMUELA	193	Active
KAWELA PLANTATION	KAUNAKAKAI	553	Active
KEALIA	KALAHEO	260	Active
KEANAE	WAILUKU	270	Active
KEKAHA DIST	—	500	Inactive
KEKAHA-WAIMEA	LIHUE	5,998	Active
KEOPU WATER ASSOCIATION	HOLUALOA	250	Active
KILAUEA	LIHUE	3,420	Active
KILAUEA INDUSTRIAL SUBDIV	—	230	Inactive
KIPAHULU WAI HUI	—	55	Inactive
KIPAPA ACRES C.P.R.	AIEA	43	Inactive
KIPU	MAUNALOA	80	Active
KOHALA RANCH WATER CO.	KAMUELA	850	Active
KOLOA GROVE FARM CO.	LIHUE	40	Inactive
KOLOA-POIPU	LIHUE	0	Inactive
KONA WATER SERVICE COMPANY	WAIKOLOA	260	Active
KUALAPUU	MAUNALOA	500	Active
KUKUIHAELE	HILO	483	Active
KULA MEADOWS	—	0	Inactive
KULA NANI	WAILUKU	80	Active
KULANI CORRECTIONAL FACILITY	HILO	250	Inactive
KUNIA VILLAGE	KUNIA	650	Active
LAHAINA	WAILUKU	20,065	Active
LAIE WATER COMPANY	LAIE	5,577	Active
LALAMILO	HILO	1,895	Active
LANAI CITY	LANAI CITY	3,200	Active
LAUPAHOEHOE-KAPEHU	HILO	1,169	Active
LAWAI-OMAO	LIHUE	0	Inactive
LIHUE-KAPAA	LIHUE	34,854	Active
LOWER KULA	WAILUKU	3,522	Active
MAHANALUA NUI SUBDIVISON	KAHULUI	606	Active
MAKAHA VALLEY	—	300	Inactive
MAKAWAO	WAILUKU	29,868	Active
MALAEKAHANA	—	100	Inactive
MARINE CORPS BASE HAWAII	KANEOHE BAY	16,300	Active
MASS TRANSIT LINES	—	400	Inactive
MATSUMOTO	—	502	Inactive
MAUI HIGHLANDS	WAILUKU	26	Active
MAUNA KEA SUGAR	—	83	Inactive
MAUNALOA-KALUAKOI	MAUNALOA	1,000	Active
MAUNAOLU	—	65	Inactive
MAUNAOLU PLANTATION	WAILUKU	100	Active
MILILANI	HONOLULU	50,573	Active
MOKULEIA ASSOCIATES	—	150	Inactive
MOLOAA	HONOLULU	44	Inactive
MOLOAA IRRIGATION COOPERATIVE	ANAHOLA	100	Active
NAHIKU	WAILUKU	107	Active
NAPUU WATER INC.	KAILUA KONA	468	Active
NAVY PUBLIC WORKS CENTER	—	4,000	Inactive
NAVY PUBLIC WORKS CENTER	—	170	Inactive
NCTAMS EASTPAC	JBPPH	6,470	Active
NINOLE	HILO	151	Active
NIULII	HILO	254	Active
NORTH KOHALA	HILO	4,933	Active
NORTH KONA	HILO	29,581	Active
OAHU SUGAR WAIPAHU	—	212	Inactive
OLAA-MOUNTAIN VIEW	HILO	6,467	Active
OLOKELE	—	1,621	Inactive
OLOWALU	KAHULUI	100	Active
OOKALA (DWS)	HILO	264	Active
OOKALA HAMAKUA	—	200	Inactive
PAAUHAU HAMAKUA SGR	—	300	Inactive
PAAUILO	—	468	Inactive
PAAUILO	HILO	716	Active
PACIFIC MISSILE RANGE FACILITY	JBPPH	1,200	Active
PAHALA	HILO	1,226	Active
PAHOA	HILO	1,885	Active
PAPAALOA	—	260	Inactive
PAPAIKOU	HILO	2,203	Active
PEPEEKEO	HILO	1,450	Active
PEPEEKEO WATER ASSOCIATION	HILO	60	Active
POAMOHO	HONOLULU	25	Active
PORT ALLEN	—	100	Inactive
PRINCEVILLE	PRINCEVILLE	6,911	Active
PUHI	LIHUE	2,206	Inactive
PUNALU'U	HONOLULU	200	Active
RADFORD TERRACE	—	1,500	Inactive
SCHOFIELD BARRACKS	SCHOFIELD BARRACKS	37,920	Active
SOUTH KOHALA	HILO	9,612	Active
SOUTH KONA	HILO	6,512	Active
THE QUEEN'S MEDICAL CENTER	HONOLULU	3,440	Active
TRIPLER ARMY MEDICAL CNTR	SCHOFIELD BARRACKS	5,555	Active
UALAPUE	WAILUKU	1,119	Active
UPPER KULA	WAILUKU	7,686	Active
US AIR FORCE	—	220	Inactive
US AIR FORCE	—	450	Inactive
US ARMY SUPPORT COMMAND HAWAII	—	1,500	Inactive
VILLA ROSE	WAILUKU	30	Active
WAHIAWA	—	300	Inactive
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
WAIKI'I RANCH	KAMUELA	102	Active
WAIKOLOA	WAIKOLOA	12,100	Active
WAILUA-KAPAA	LIHUE	17,179	Inactive
WAILUKU	WAILUKU	74,511	Active
WAIMEA	—	1,867	Inactive
WAIOHINU-NAALEHU	HILO	2,948	Active
WAIPAHU-EWA-WAIANAE	HONOLULU	217,479	Active
WAIPIO HEIGHTS	HONOLULU	11,516	Active
WEST KUIAHA MEADOWS	WAILUKU	60	Active
WHEELER	—	389	Inactive
WM HYDE RICE LTD.	—	50	Inactive
WOOD VALLEY	PAHALA	75	Active
WOODLANDS AT NUUANU	HONOLULU	48	Active