All water systems in Hawaii
135 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Kipahulu Haleakala · Maui County |
2,000 | 0 | 0 | |
|
Kokee State Park Kokee State Park · Kauai County |
2,000 | 0 | 0 | |
|
Kaupulehu Kona · Hawaii County |
1,945 | 0 | 0 | |
|
Lalamilo Lalamilo · Hawaii County |
1,895 | 0 | 0 | |
|
Pahoa Pahoa · Hawaii County |
1,885 | 0 | 0 | |
|
Dillingham Airfield Mokuleia · Honolulu County |
1,800 | 0 | 0 | |
|
Pepeekeo Pepeekeo · Hawaii County |
1,450 | 0 | 0 | |
|
Hawaiian Shores Hawaiian Shores Dho · Hawaii County |
1,360 | 0 | 0 | |
|
Hana Hana · Maui County |
1,284 | 0 | 0 | |
|
Gay & Robinson Kaumakani · Kauai County |
1,271 | 0 | 0 | |
|
Pahala Pahala · Hawaii County |
1,226 | 0 | 0 | |
|
Haleakala National Park Kula · Maui County |
1,200 | 0 | 0 | |
|
Pacific Missile Range Facility Pmrf Housing (dho) · Kauai County |
1,200 | 0 | 0 | |
|
Laupahoehoe-Kapehu Laupahoehoe · Hawaii County |
1,169 | 0 | 0 | |
|
Ualapue Ualapue · Maui County |
1,119 | 0 | 0 | |
|
Hawaiian Ocean View Estates Kona · Hawaii County |
1,000 | 0 | 0 | |
|
Hoku'ula Water System Makawao · Maui County |
1,000 | 0 | 0 | |
|
Maunaloa-Kaluakoi Maunaloa, Molokai · Maui County |
1,000 | 1 | 1 | |
|
Kohala Ranch Water Co. Kohala Joint Venture · Hawaii County |
850 | 0 | 0 | |
|
Haena-Wainiha Haena-wainiha · Kauai County |
833 | 0 | 0 | |
|
Hana Water Systems South Keola Hana-hotel Dho · Maui County |
816 | 0 | 0 | |
|
The Queen's Medical Center West Oahu Kunia · Honolulu County |
800 | 0 | 0 | |
|
Paauilo Paauilo · Hawaii County |
716 | 0 | 0 | |
|
Kunia Village Wahiawa · Honolulu County |
650 | 0 | 0 | |
|
Honomu Honomu · Hawaii County |
645 | 0 | 0 | |
|
Mahanalua Nui Subdivison Mahanalua Nui · Maui County |
606 | 0 | 0 | |
|
Camp Stover Wahiawa · Honolulu County |
595 | 0 | 0 | |
|
Kawela Plantation Kawela · Maui County |
553 | 0 | 0 | |
|
Waimano Ridge Pearlridge · Honolulu County |
545 | 0 | 0 | |
|
Hanalei Hanalei (dow) · Kauai County |
500 | 0 | 0 | |
|
Kualapuu Kualapuu · Maui County |
500 | 1 | 1 | |
|
Kukuihaele Kukuihaele · Hawaii County |
483 | 0 | 0 | |
|
Napuu Water Inc. Puuwaawaa Ranch Dho · Hawaii County |
468 | 0 | 0 | |
|
Waiawa Correctional Facility Waipahu · Honolulu County |
444 | 0 | 0 | |
|
Hakalau-Wailea Hakalau-wailea · Hawaii County |
402 | 0 | 0 | |
|
Waialua Sugar Pump 2 Waialua-haleiwa · Honolulu County |
400 | 0 | 0 | |
|
Anahola Farm Lots Anahola Farm Lots (dho) · Kauai County |
385 | 0 | 0 | |
|
Kalae Makena · Maui County |
360 | 0 | 0 | |
|
Polihale State Park Polihale State Park · Kauai County |
300 | 0 | 0 | |
|
Waiahole Kahana Valley · Honolulu County |
300 | 0 | 0 | |
|
Kalapana Kalapana (dws) · Hawaii County |
275 | 0 | 0 | |
|
Keanae Keanae (dws) · Maui County |
270 | 0 | 0 | |
|
Ookala (dws) Ookala · Hawaii County |
264 | 0 | 0 | |
|
Kealia Kealia (dho) · Kauai County |
260 | 0 | 0 | |
|
Kona Water Service Company Kona · Hawaii County |
260 | 0 | 0 | |
|
Niulii Niulii · Hawaii County |
254 | 0 | 0 | |
|
Keopu Water Association Kona · Hawaii County |
250 | 1 | 0 | |
|
Kilauea Military Camp Kilauea Volcano · Hawaii County |
220 | 0 | 0 | |
|
Punalu'u Punaluu (dho) · Hawaii County |
200 | 0 | 0 | |
|
Kawaihae Unit #1 Kawaihae · Hawaii County |
193 | 0 | 0 |
About this data
Rules violated counts the rules a system was in violation of in the past three years, including monitoring and reporting lapses; one rule can carry several violations. Unresolved is the number of those rules currently in violation at EPA's latest data refresh.
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.