Hawaii
Maui County drinking water quality
39 active public water systems serve 169,182 people in Maui County. 34 are compliant, 5 had at least one EPA violation in the past three years, 0 are designated serious violators, and 0 carry a health flag.
Community water systems
35 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Wailuku Wailuku |
74,511 | 0 | 0 | |
|
Makawao Makawao |
29,868 | 0 | 0 | |
|
Lahaina Lahaina |
20,065 | 0 | 0 | |
|
Kaanapali Kaanapali (dho) |
8,000 | 0 | 0 | |
|
Upper Kula Kula |
7,686 | 0 | 0 | |
|
Kapalua Kapalua (dho) |
4,200 | 0 | 0 | |
|
Kaunakakai Kaunakakai |
3,702 | 0 | 0 | |
|
Lower Kula Kula |
3,522 | 0 | 0 | |
|
Lanai City Lanai |
3,200 | 3 | 1 | |
|
Hoolehua Hoolehua |
2,400 | 0 | 0 | |
|
Hana Hana |
1,284 | 0 | 0 | |
|
Haleakala National Park Kula |
1,200 | 0 | 0 | |
|
Ualapue Ualapue |
1,119 | 0 | 0 | |
|
Hoku'ula Water System Makawao |
1,000 | 0 | 0 | |
|
Maunaloa-Kaluakoi Maunaloa, Molokai |
1,000 | 1 | 1 | |
|
Hana Water Systems South Keola Hana-hotel Dho |
816 | 0 | 0 | |
|
Mahanalua Nui Subdivison Mahanalua Nui |
606 | 0 | 0 | |
|
Kawela Plantation Kawela |
553 | 0 | 0 | |
|
Kualapuu Kualapuu |
500 | 1 | 1 | |
|
Kalae Makena |
360 | 0 | 0 | |
|
Keanae Keanae (dws) |
270 | 0 | 0 | |
|
Hana Water Systems North Kaeleku Ag Park Hana |
160 | 0 | 0 | |
|
Kahakuloa Water Co. Kahakuloa Homestead |
150 | 0 | 0 | |
|
Kalaupapa Nhp Kalaupapa |
110 | 1 | 1 | |
|
Nahiku Nahiku |
107 | 0 | 0 | |
|
Maunaolu Plantation Haiku |
100 | 0 | 0 | |
|
Olowalu Olowalu |
100 | 0 | 0 | |
|
Kailua Kailua Maui |
90 | 0 | 0 | |
|
Kipu Haleakala |
80 | 1 | 1 | |
|
Kula Nani Kula |
80 | 0 | 0 | |
|
West Kuiaha Meadows Haiku |
60 | 0 | 0 | |
|
Honokohau Lahaina |
42 | 0 | 0 | |
|
Baldwin Ranch Estates Makawao |
32 | 0 | 0 | |
|
Maui Highlands Kihei |
26 | 0 | 0 | |
|
Haiku Town Water Association, Inc. Haiku |
20 | 0 | 0 |
Non-community systems (4: schools, campgrounds, workplaces, restaurants)
These systems serve places people visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Kipahulu Haleakala |
2,000 | 0 | 0 | |
|
Consolidated Baseyards Waikapu |
90 | 0 | 0 | |
|
Maui Business Park Phase II Kahului |
63 | 0 | 0 | |
|
Pulehunui Water Association |
10 | 0 | 0 |
Inactive systems (12, no longer operating or reporting)
Kept for the record and excluded from the county totals above. Browse inactive systems.
About this data
Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.
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. Retrieved from ECHO on Oct 11, 2026.