Results from entry points (water leaving treatment, not household taps) of public water systems sampled under EPA's Fifth Unregulated Contaminant Monitoring Rule. Click a county to see every water system serving it, or turn on service areas and click a location to see the systems that serve that spot.
45 of the 132 public water systems listed for Hawaii were sampled. Sorted by the highest single result relative to EPA's 2024 limits. Each name links to a page with all of that system's results. All 132 Hawaii systems, including those not tested · Download all Hawaii results (CSV, gzip)
| System | PWSID | City | Population | PFOA (ppt) | PFOS (ppt) | HI | Highest single result |
|---|---|---|---|---|---|---|---|
| Hnl-Windward-Pearl Harbor | HI0000331 | Honolulu | 631,389 | <MRL | <MRL | 0.3 | Hazard Index below its limit |
| Waipahu-Ewa-Waianae | HI0000335 | Honolulu | 217,479 | <MRL | <MRL | 0 | Other PFAS detected |
| Aliamanu | HI0000337 | Schofield Barracks | 6,406 | <MRL | <MRL | 0 | No PFAS detected |
| Barbers Point | HI0000355 | Waikoloa | 5,256 | <MRL | <MRL | 0 | No PFAS detected |
| Fort Shafter | HI0000341 | Schofield Barracks | 7,067 | <MRL | <MRL | 0 | No PFAS detected |
| Haina | HI0000161 | Hilo | 4,563 | <MRL | <MRL | 0 | No PFAS detected |
| Hanapepe-Eleele | HI0000404 | Lihue | 5,592 | <MRL | <MRL | 0 | No PFAS detected |
| Hawaii Volcanoes Nat.Park | HI0000146 | Hawaii National Park | 4,201 | <MRL | <MRL | 0 | No PFAS detected |
| Hawaiian Beaches | HI0000117 | Pahoa | 3,546 | <MRL | <MRL | 0 | No PFAS detected |
| Hilo | HI0000101 | Hilo | 39,477 | <MRL | <MRL | 0 | No PFAS detected |
| Joint Base Pearl Harbor-Hickam | HI0000360 | Jbpph | 65,230 | <MRL | <MRL | 0 | No PFAS detected |
| Kaanapali | HI0000205 | Waikoloa | 8,000 | <MRL | <MRL | 0 | No PFAS detected |
| Kalaheo-Koloa | HI0000434 | Lihue | 12,660 | <MRL | <MRL | 0 | No PFAS detected |
| Kamehameha Schools | HI0000319 | Honolulu | 4,000 | <MRL | <MRL | 0 | No PFAS detected |
| Kapalua | HI0000204 | Kapalua | 4,200 | <MRL | <MRL | 0 | No PFAS detected |
| Kaunakakai | HI0000234 | Wailuku | 3,702 | <MRL | <MRL | 0 | No PFAS detected |
| Keanae | HI0000219 | Wailuku | 270 | <MRL | <MRL | 0 | No PFAS detected |
| Kekaha-Waimea | HI0000406 | Lihue | 5,998 | <MRL | <MRL | 0 | No PFAS detected |
| Kilauea | HI0000407 | Lihue | 3,420 | <MRL | <MRL | 0 | No PFAS detected |
| Kohala Ranch Water Co. | HI0000151 | Kamuela | 850 | <MRL | <MRL | 0 | No PFAS detected |
| Lahaina | HI0000214 | Wailuku | 20,065 | <MRL | <MRL | 0 | No PFAS detected |
| Laie Water Company | HI0000325 | Laie | 5,577 | <MRL | <MRL | 0 | No PFAS detected |
| Lihue-Kapaa | HI0000400 | Lihue | 34,854 | <MRL | <MRL | 0 | No PFAS detected |
| Lower Kula | HI0000247 | Wailuku | 3,522 | <MRL | <MRL | 0 | No PFAS detected |
| Makawao | HI0000213 | Wailuku | 29,868 | <MRL | <MRL | 0 | No PFAS detected |
| Marine Corps Base Hawaii | HI0000356 | Kaneohe Bay | 16,300 | <MRL | <MRL | 0 | No PFAS detected |
| Mililani | HI0000367 | Honolulu | 50,573 | <MRL | <MRL | 0 | No PFAS detected |
| Nctams Eastpac | HI0000357 | Jbpph | 6,470 | <MRL | <MRL | 0 | No PFAS detected |
| North Kohala | HI0000129 | Hilo | 4,933 | <MRL | <MRL | 0 | No PFAS detected |
| North Kona | HI0000131 | Hilo | 29,581 | <MRL | <MRL | 0 | No PFAS detected |
| Olaa-Mountain View | HI0000112 | Hilo | 6,467 | <MRL | <MRL | 0 | No PFAS detected |
| Princeville | HI0000428 | Princeville | 6,911 | <MRL | <MRL | 0 | No PFAS detected |
| Punahou School | HI0000324 | Honolulu | 4,000 | <MRL | <MRL | 0 | No PFAS detected |
| Schofield Barracks | HI0000345 | Schofield Barracks | 37,920 | <MRL | <MRL | 0 | No PFAS detected |
| South Kohala | HI0000130 | Hilo | 9,612 | <MRL | <MRL | 0 | No PFAS detected |
| South Kona | HI0000132 | Hilo | 6,512 | <MRL | <MRL | 0 | No PFAS detected |
| The Queen'S Medical Center | HI0000312 | Honolulu | 3,440 | <MRL | <MRL | 0 | No PFAS detected |
| Tripler Army Medical Cntr | HI0000346 | Schofield Barracks | 5,555 | <MRL | <MRL | 0 | No PFAS detected |
| Upper Kula | HI0000215 | Wailuku | 7,686 | <MRL | <MRL | 0 | No PFAS detected |
| Wahiawa | HI0000333 | Honolulu | 23,348 | <MRL | <MRL | 0 | No PFAS detected |
| Waialee-Sunset Beach | HI0000366 | Honolulu | 4,916 | <MRL | <MRL | 0 | No PFAS detected |
| Waialua-Haleiwa | HI0000332 | Honolulu | 9,996 | <MRL | <MRL | 0 | No PFAS detected |
| Waikoloa | HI0000135 | Waikoloa | 12,100 | <MRL | <MRL | 0 | No PFAS detected |
| Wailuku | HI0000212 | Wailuku | 74,511 | <MRL | <MRL | 0 | No PFAS detected |
| Waipio Heights | HI0000334 | Honolulu | 11,516 | <MRL | <MRL | 0 | No PFAS detected |
Highest single result for each system; PFOA and PFOS in ppt (ng/L). Entry-point samples, not tap water; screening comparisons, not compliance determinations.