Hawaii tap water, by utility.
44 utilities with a full report, serving 1.5 million people as they report it. Regulated PFAS turned up at 1 of them.
| Utility | Based in | Serves | Regulated PFAS | Health-based violations since 2016 |
|---|---|---|---|---|
| Hnl - Windward - Pearl Harbor | Honolulu - Windward - Pearlharbor | 631,389 | PFHxS | 0 |
| Waipahu - Ewa - Waianae | Waipahu - Ewa - Waianae | 217,479 | None found | 0 |
| Wailuku | Wailuku | 74,511 | None found | 0 |
| Joint Base Pearl Harbor - Hickam | Pearl Harbor | 65,230 | None found | 0 |
| Mililani | Mililani Bws | 50,573 | None found | 0 |
| Hilo | Hilo | 39,477 | None found | 0 |
| Schofield Barracks | Schofield Barracks | 37,920 | None found | 0 |
| Lihue - Kapaa | Lihue - Kapaa | 34,854 | None found | 0 |
| Makawao | Makawao | 29,868 | None found | 1 |
| North Kona | North Kona | 29,581 | None found | 0 |
| Wahiawa | Honolulu | 23,348 | None found | 0 |
| Lahaina | Lahaina | 20,065 | None found | 0 |
| Marine Corps Base Hawaii | Kaneohe | 16,300 | None found | 0 |
| Kalaheo - Koloa | Kalaheo | 12,660 | None found | 0 |
| Waikoloa | Waikoloa (Dho) | 12,100 | None found | 0 |
| Waipio Heights | Waipio | 11,516 | None found | 0 |
| Waialua - Haleiwa | Waialua - Haleiwa | 9,996 | None found | 0 |
| South Kohala | South Kohala | 9,612 | None found | 0 |
| Kaanapali | Kaanapali (Dho) | 8,000 | None found | 0 |
| Upper Kula | Kula | 7,686 | None found | 0 |
| Fort Shafter | Schofield Barracks | 7,067 | None found | 0 |
| Princeville | Princeville (Dho) | 6,911 | None found | 0 |
| South Kona | South Kona | 6,512 | None found | 0 |
| Nctams Eastpac | Wahiawa | 6,470 | None found | 0 |
| Olaa - Mountain View | Olaa - Mt.View | 6,467 | None found | 0 |
| Aliamanu | Salt Lake | 6,406 | None found | 0 |
| Kekaha - Waimea | Kekaha (Dow) | 5,998 | None found | 0 |
| Hanapepe - Eleele | Hanapepe - Eleele (Dow) | 5,592 | None found | 0 |
| Laie Water Company | Laie | 5,577 | None found | 0 |
| Tripler Army Medical Cntr | Moanalua | 5,555 | None found | 0 |
| Barbers Point | Waipahu - Ewa - Waianae | 5,256 | None found | 0 |
| North Kohala | North Kohala | 4,933 | None found | 0 |
| Waialee - Sunset Beach | Sunset Beach | 4,916 | None found | 0 |
| Haina | Haina | 4,563 | None found | 0 |
| Hawaii Volcanoes Nat.Park | Hvnp (Dho) | 4,201 | None found | 0 |
| Kapalua | Kapalua (Dho) | 4,200 | None found | 0 |
| Kamehameha Schools | Kapalama | 4,000 | None found | 0 |
| Kaunakakai | Kaunakakai | 3,702 | None found | 0 |
| Hawaiian Beaches | Hawaiian Shores Dho | 3,546 | None found | 0 |
| Lower Kula | Kula | 3,522 | None found | 0 |
| The Queen'S Medical Center | Downtown Honolulu | 3,440 | None found | 0 |
| Kilauea | Kilauea (Dow) | 3,420 | None found | 0 |
| Kohala Ranch Water Co. | Kohala Joint Venture | 850 | None found | 0 |
| Keanae | Keanae (DWS) | 270 | None found | 0 |
| Utilities EPA sampled under UCMR 5, plus any other community system serving 3,300 people or more. Smaller systems appear in ZIP code results. Data: EPA SDWIS 2026 Q2 and UCMR 5. | ||||