All water systems in Hawaii
135 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Kahili Mountain Park Kahili Mountain Park · Kauai County |
175 | 0 | 0 | |
|
Anini Hanalei (dow) · Kauai County |
174 | 0 | 0 | |
|
Hana Water Systems North Kaeleku Ag Park Hana · Maui County |
160 | 0 | 0 | |
|
Ninole Ninole · Hawaii County |
151 | 0 | 0 | |
|
Kahakuloa Water Co. Kahakuloa Homestead · Maui County |
150 | 0 | 0 | |
|
Navmag Lualualei Waianae · Honolulu County |
114 | 0 | 0 | |
|
Kalaupapa Nhp Kalaupapa · Maui County |
110 | 1 | 1 | |
|
Nahiku Nahiku · Maui County |
107 | 0 | 0 | |
|
Waiki'i Ranch Waikii Ranch (dho) · Hawaii County |
102 | 0 | 0 | |
|
Dillingham Ranch Waialua-haleiwa · Honolulu County |
100 | 0 | 0 | |
|
Maunaolu Plantation Haiku · Maui County |
100 | 0 | 0 | |
|
Mililani Memorial Park Mililani Bws · Honolulu County |
100 | 0 | 0 | |
|
Moloaa Irrigation Cooperative Anahola · Kauai County |
100 | 0 | 0 | |
|
Olowalu Olowalu · Maui County |
100 | 0 | 0 | |
|
Consolidated Baseyards Waikapu · Maui County |
90 | 0 | 0 | |
|
Kailua Kailua Maui · Maui County |
90 | 0 | 0 | |
|
Kipu Haleakala · Maui County |
80 | 1 | 1 | |
|
Kula Nani Kula · Maui County |
80 | 0 | 0 | |
|
New Moon Foundation Kapaau · Hawaii County |
80 | 0 | 0 | |
|
Kahuku Air Base Kahuku Air Base · Honolulu County |
75 | 0 | 0 | |
|
Wood Valley Pahala · Hawaii County |
75 | 0 | 0 | |
|
Maui Business Park Phase II Kahului · Maui County |
63 | 0 | 0 | |
|
Koolau Ranch Kilauea (dow) · Kauai County |
60 | 0 | 0 | |
|
Pepeekeo Water Association Pepeekeo · Hawaii County |
60 | 0 | 0 | |
|
West Kuiaha Meadows Haiku · Maui County |
60 | 0 | 0 | |
|
Palehua Solar Observatory Makakilo · Honolulu County |
50 | 0 | 0 | |
|
Woodlands at Nuuanu Honolulu · Honolulu County |
48 | 0 | 0 | |
|
ST Stephen's Diocesan Ctr Kaneohe · Honolulu County |
45 | 1 | 0 | |
|
Honokohau Lahaina · Maui County |
42 | 0 | 0 | |
|
Baldwin Ranch Estates Makawao · Maui County |
32 | 0 | 0 | |
|
Villa Rose Waialua-haleiwa · Honolulu County |
30 | 1 | 0 | |
|
Maui Highlands Kihei · Maui County |
26 | 0 | 0 | |
|
Poamoho Wahiawa · Honolulu County |
25 | 0 | 0 | |
|
Haiku Town Water Association, Inc. Haiku · Maui County |
20 | 0 | 0 | |
|
Pulehunui Water Association Maui County |
10 | 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.