Water quality in Kailua Maui, Hawaii
Kailua Maui is in Maui County. 39 active public water systems serve the county; 5 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Maui County
34 systems, largest first| System | Serves | Status | Rules violated, 3 yr |
|---|---|---|---|
| Makawao Makawao |
29,868 | 0 | |
| Lahaina Lahaina |
20,065 | 0 | |
| Kaanapali Kaanapali (dho) |
8,000 | 0 | |
| Upper Kula Kula |
7,686 | 0 | |
| Kapalua Kapalua (dho) |
4,200 | 0 | |
| Kaunakakai Kaunakakai |
3,702 | 0 | |
| Lower Kula Kula |
3,522 | 0 | |
| Lanai City Lanai |
3,200 | 3 | |
| Hoolehua Hoolehua |
2,400 | 0 | |
| Hana Hana |
1,284 | 0 | |
| Haleakala National Park Kula |
1,200 | 0 | |
| Ualapue Ualapue |
1,119 | 0 | |
| Hoku'ula Water System Makawao |
1,000 | 0 | |
| Maunaloa-Kaluakoi Maunaloa, Molokai |
1,000 | 1 | |
| Hana Water Systems South Keola Hana-hotel Dho |
816 | 0 | |
| Mahanalua Nui Subdivison Mahanalua Nui |
606 | 0 | |
| Kawela Plantation Kawela |
553 | 0 | |
| Kualapuu Kualapuu |
500 | 1 | |
| Kalae Makena |
360 | 0 | |
| Keanae Keanae (dws) |
270 | 0 | |
| Hana Water Systems North Kaeleku Ag Park Hana |
160 | 0 | |
| Kahakuloa Water Co. Kahakuloa Homestead |
150 | 0 | |
| Kalaupapa Nhp Kalaupapa |
110 | 1 | |
| Nahiku Nahiku |
107 | 0 | |
| Maunaolu Plantation Haiku |
100 | 0 |
Non-community systems in Maui County (4: schools, campgrounds, workplaces, restaurants)
These systems serve places you 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 |
About this data
Water systems are matched to Maui County, largest first. Your exact provider depends on your address and connection; the largest community water system in a county is usually the city or town utility.
Town locations and ZIP code areas come from U.S. Census Bureau 2020 files.
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.