Public Water Systems
137 active public water systems in HI, tracked from EPA's Safe Drinking Water Information System (SDWIS) across all 50 states. See our methodology.
| System Name | Location | Population | Violations | PFAS |
|---|---|---|---|---|
| Hnl-Windward-Pearl Harbor | Honolulu, HI | 631,389 | 130 | Detected |
| Waipahu-Ewa-Waianae | Honolulu, HI | 217,479 | 14 | Detected |
| Wailuku | Wailuku, HI | 74,511 | 59 | Clean |
| Joint Base Pearl Harbor-Hickam | Jbpph, HI | 65,230 | 34 | Clean |
| Mililani | Honolulu, HI | 50,573 | 42 | Clean |
| Hilo | Hilo, HI | 39,477 | 170 | Clean |
| Schofield Barracks | Schofield Barracks, HI | 37,920 | 23 | Clean |
| Lihue-Kapaa | Lihue, HI | 34,854 | 37 | Clean |
| Makawao | Wailuku, HI | 29,868 | 304 | Clean |
| North Kona | Hilo, HI | 29,581 | 8 | Clean |
| Wahiawa | Honolulu, HI | 23,348 | 0 | Clean |
| Lahaina | Wailuku, HI | 20,065 | 243 | Clean |
| Marine Corps Base Hawaii | Kaneohe Bay, HI | 16,300 | 29 | Clean |
| Kalaheo-Koloa | Lihue, HI | 12,660 | 3 | Clean |
| Waikoloa | Waikoloa, HI | 12,100 | 14 | Clean |
| Waipio Heights | Honolulu, HI | 11,516 | 0 | Clean |
| Waialua-Haleiwa | Honolulu, HI | 9,996 | 0 | Clean |
| South Kohala | Hilo, HI | 9,612 | 283 | Clean |
| Kaanapali | Waikoloa, HI | 8,000 | 18 | Clean |
| Upper Kula | Wailuku, HI | 7,686 | 256 | Clean |
| Fort Shafter | Schofield Barracks, HI | 7,067 | 14 | Clean |
| Princeville | Princeville, HI | 6,911 | 13 | Clean |
| South Kona | Hilo, HI | 6,512 | 12 | Clean |
| Nctams Eastpac | Jbpph, HI | 6,470 | 5 | Clean |
| Olaa-Mountain View | Hilo, HI | 6,467 | 0 | Clean |
| Aliamanu | Schofield Barracks, HI | 6,406 | 21 | Clean |
| Kekaha-Waimea | Lihue, HI | 5,998 | 21 | Clean |
| Hanapepe-Eleele | Lihue, HI | 5,592 | 11 | Clean |
| Laie Water Company | Laie, HI | 5,577 | 32 | Clean |
| Tripler Army Medical Cntr | Schofield Barracks, HI | 5,555 | 24 | Clean |
| Barbers Point | Waikoloa, HI | 5,256 | 8 | Clean |
| North Kohala | Hilo, HI | 4,933 | 5 | Clean |
| Waialee-Sunset Beach | Honolulu, HI | 4,916 | 0 | Clean |
| Haina | Hilo, HI | 4,563 | 0 | Clean |
| Hawaii Volcanoes Nat.park | Hawaii National Park, HI | 4,201 | 11 | Clean |
| Kapalua | Kapalua, HI | 4,200 | 30 | Clean |
| Kamehameha Schools | Honolulu, HI | 4,000 | 4 | Clean |
| Punahou School | Honolulu, HI | 4,000 | 43 | Clean |
| Kaunakakai | Wailuku, HI | 3,702 | 76 | Clean |
| Hawaiian Beaches | Pahoa, HI | 3,546 | 19 | Clean |
| Lower Kula | Wailuku, HI | 3,522 | 145 | Clean |
| The Queen's Medical Center | Honolulu, HI | 3,440 | 27 | Clean |
| Kilauea | Lihue, HI | 3,420 | 1 | Clean |
| Lanai City | Lanai City, HI | 3,200 | 153 | - |
| Waiohinu-Naalehu | Hilo, HI | 2,948 | 0 | - |
| Sheraton Hotels | Honolulu, HI | 2,830 | 28 | - |
| Kahuku | Honolulu, HI | 2,730 | 3 | - |
| Anahola | Lihue, HI | 2,473 | 1 | - |
| Hoolehua | Kaunakakai, HI | 2,400 | 46 | - |
| Papaikou | Hilo, HI | 2,203 | 4 | - |
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