Hawaii
Kauai County drinking water quality
19 active public water systems serve 79,166 people in Kauai County. 19 are compliant, 0 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
16 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Lihue-Kapaa Lihue-kapaa |
34,854 | 0 | 0 | |
|
Kalaheo-Koloa Kalaheo |
12,660 | 0 | 0 | |
|
Princeville Princeville (dho) |
6,911 | 0 | 0 | |
|
Kekaha-Waimea Kekaha (dow) |
5,998 | 0 | 0 | |
|
Hanapepe-Eleele Hanapepe-eleele (dow) |
5,592 | 0 | 0 | |
|
Kilauea Kilauea (dow) |
3,420 | 0 | 0 | |
|
Anahola Anahola |
2,473 | 0 | 0 | |
|
Gay & Robinson Kaumakani |
1,271 | 0 | 0 | |
|
Pacific Missile Range Facility Pmrf Housing (dho) |
1,200 | 0 | 0 | |
|
Haena-Wainiha Haena-wainiha |
833 | 0 | 0 | |
|
Hanalei Hanalei (dow) |
500 | 0 | 0 | |
|
Anahola Farm Lots Anahola Farm Lots (dho) |
385 | 0 | 0 | |
|
Kealia Kealia (dho) |
260 | 0 | 0 | |
|
Kahili Mountain Park Kahili Mountain Park |
175 | 0 | 0 | |
|
Anini Hanalei (dow) |
174 | 0 | 0 | |
|
Moloaa Irrigation Cooperative Anahola |
100 | 0 | 0 |
Non-community systems (3: schools, campgrounds, workplaces, restaurants)
These systems serve places people visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Kokee State Park Kokee State Park |
2,000 | 0 | 0 | |
|
Polihale State Park Polihale State Park |
300 | 0 | 0 | |
|
Koolau Ranch Kilauea (dow) |
60 | 0 | 0 |
Inactive systems (14, 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.