132 community and non-transient non-community water systems are listed for Hawaii in EPA SDWIS. 45 were sampled under UCMR 5; 2 of those had at least one PFAS result at or above the reporting level, and 0 had a highest single result at or above a 2024 EPA limit (PFOA or PFOS 4 ppt, or Hazard Index 1).
Hawaii map · Download: systems (CSV) · all results (CSV, gzip)
These are monitoring results collected under EPA's Fifth Unregulated Contaminant Monitoring Rule (UCMR 5) at entry points, where treated water enters the distribution system; they are not tap-water samples. They are not compliance determinations: compliance with EPA's 2024 PFAS limits is judged on running annual averages of compliance monitoring, required from 2029, so a single UCMR 5 result at or above a limit is not a violation. “< MRL” means the compound was not quantified at EPA's minimum reporting level; it does not mean zero.
Sampled under UCMR 5 (45)
| System | PWSID | City | Population | Highest PFOA (ppt) | Highest PFOS (ppt) | Highest HI | Highest single result |
|---|---|---|---|---|---|---|---|
| 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 |
| Hnl-Windward-Pearl Harbor | HI0000331 | Honolulu | 631,389 | <MRL | <MRL | 0.3 | Hazard Index below its limit |
| 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 |
| Waipahu-Ewa-Waianae | HI0000335 | Honolulu | 217,479 | <MRL | <MRL | 0 | Other PFAS detected |
| Waipio Heights | HI0000334 | Honolulu | 11,516 | <MRL | <MRL | 0 | No PFAS detected |
Not tested under UCMR 5 (87)
UCMR 5 required monitoring by systems serving 3,300 or more people and by a representative sample of smaller systems. The systems below have no UCMR 5 results in EPA's data. Not tested is not the same as not detected: the absence of results says nothing about PFAS in their water.
| System | PWSID | Type | City | Population | Counties |
|---|---|---|---|---|---|
| Anahola | HI0000401 | CWS | Lihue | 2,473 | Kauai County |
| Anahola Farm Lots | HI0000432 | CWS | Lihue | 385 | Kauai County |
| Anini | HI0000402 | CWS | Lihue | 174 | Kauai County |
| Baldwin Ranch Estates | HI0000266 | CWS | Pukalani | 32 | Maui County |
| Camp Stover | HI0000354 | CWS | Jbpph | 595 | Honolulu County |
| Consolidated Baseyards | HI0000258 | NTNCWS | Wailuku | 90 | Maui County |
| Dillingham Airfield | HI0000338 | CWS | Honolulu | 1,800 | Honolulu County |
| Dillingham Ranch | HI0000326 | CWS | Beverly Hills | 100 | Honolulu County |
| Gay & Robinson | HI0000417 | CWS | Kaumakani | 1,271 | Kauai County |
| Haena-Wainiha | HI0000415 | CWS | Lihue | 833 | Kauai County |
| Haiku Town Water Association, Inc. | HI0000263 | CWS | Kahului | 20 | Maui County |
| Hakalau-Wailea | HI0000154 | CWS | Hilo | 402 | Hawaii County |
| Haleakala National Park | HI0000222 | CWS | Makawao | 1,200 | Maui County |
| Hana | HI0000217 | CWS | Wailuku | 1,284 | Maui County |
| Hana Water Systems - North | HI0000243 | CWS | Hana | 160 | Maui County |
| Hana Water Systems - South | HI0000201 | CWS | Hana | 816 | Maui County |
| Hanalei | HI0000403 | CWS | Lihue | 500 | Kauai County |
| Hawaiian Ocean View Estates | HI0000169 | CWS | Hilo | 1,000 | Hawaii County |
| Hawaiian Shores | HI0000156 | CWS | Pahoa | 1,360 | Hawaii County |
| Hoku'Ula Water System | HI0000267 | CWS | 1,000 | Maui County | |
| Honokohau | HI0000218 | CWS | Wailuku | 42 | Maui County |
| Honomu | HI0000105 | CWS | Hilo | 645 | Hawaii County |
| Hoolehua | HI0000230 | CWS | Kaunakakai | 2,400 | Maui County |
| Kahakuloa Water Co. | HI0000249 | CWS | Wailuku | 150 | Maui County |
| Kahili Mountain Park | HI0000422 | CWS | Koloa | 175 | Kauai County |
| Kahuku | HI0000365 | CWS | Honolulu | 2,730 | Honolulu County |
| Kahuku Air Base | HI0000315 | CWS | Kahuku | 75 | Honolulu County |
| Kailua | HI0000203 | CWS | Puunene | 90 | Maui County |
| Kalae | HI0000235 | CWS | Wailuku | 360 | Maui County |
| Kalapana | HI0000110 | CWS | Hilo | 275 | Hawaii County |
| Kalaupapa Nhp | HI0000239 | CWS | Kalaupapa | 110 | Kalawao County, Maui County |
| Kaupulehu | HI0000163 | CWS | Kailua-Kona | 1,945 | Hawaii County |
| Kawaihae Unit #1 | HI0000164 | CWS | Kamuela | 193 | Hawaii County |
| Kawela Plantation | HI0000248 | CWS | Kaunakakai | 553 | Maui County |
| Kealia | HI0000423 | CWS | Kalaheo | 260 | Kauai County |
| Keopu Water Association | HI0000168 | CWS | Holualoa | 250 | Hawaii County |
| Kilauea Military Camp | HI0000144 | NTNCWS | Hilo | 220 | Hawaii County |
| Kipu | HI0000245 | CWS | Maunaloa | 80 | Maui County |
| Kokee State Park | HI0000425 | NTNCWS | Honolulu | 2,000 | Kauai County |
| Kona Water Service Company | HI0000165 | CWS | Waikoloa | 260 | Hawaii County |
| Koolau Ranch | HI0000438 | NTNCWS | Kilauea | 60 | Kauai County |
| Kualapuu | HI0000229 | CWS | Maunaloa | 500 | Maui County |
| Kukuihaele | HI0000133 | CWS | Hilo | 483 | Hawaii County |
| Kula Nani | HI0000255 | CWS | Wailuku | 80 | Maui County |
| Kunia Village | HI0000303 | CWS | Kunia | 650 | Honolulu County |
| Lalamilo | HI0000160 | CWS | Hilo | 1,895 | Hawaii County |
| Lanai City | HI0000237 | CWS | Lanai City | 3,200 | Maui County |
| Laupahoehoe-Kapehu | HI0000102 | CWS | Hilo | 1,169 | Hawaii County |
| Mahanalua Nui Subdivison | HI0000251 | CWS | Kahului | 606 | Maui County |
| Maui Business Park Phase Ii | HI0000261 | NTNCWS | Wailuku | 63 | Maui County |
| Maui Highlands | HI0000256 | CWS | Wailuku | 26 | Maui County |
| Maunaloa-Kaluakoi | HI0000231 | CWS | Maunaloa | 1,000 | Maui County |
| Maunaolu Plantation | HI0000254 | CWS | Wailuku | 100 | Maui County |
| Mililani Memorial Park | HI0000320 | NTNCWS | Pearl City | 100 | Honolulu County |
| Moloaa Irrigation Cooperative | HI0000437 | CWS | Anahola | 100 | Kauai County |
| Nahiku | HI0000220 | CWS | Wailuku | 107 | Maui County |
| Napuu Water Inc. | HI0000150 | CWS | Kailua Kona | 468 | Hawaii County |
| Navmag Lualualei | HI0000358 | NTNCWS | Jbpph | 114 | Honolulu County |
| Ninole | HI0000103 | CWS | Hilo | 151 | Hawaii County |
| Niulii | HI0000139 | CWS | Hilo | 254 | Hawaii County |
| Olowalu | HI0000209 | CWS | Kahului | 100 | Maui County |
| Ookala (Dws) | HI0000104 | CWS | Hilo | 264 | Hawaii County |
| Paauilo | HI0000134 | CWS | Hilo | 716 | Hawaii County |
| Pacific Missile Range Facility | HI0000430 | CWS | Jbpph | 1,200 | Kauai County |
| Pahala | HI0000109 | CWS | Hilo | 1,226 | Hawaii County |
| Pahoa | HI0000111 | CWS | Hilo | 1,885 | Hawaii County |
| Palehua Solar Observatory | HI0000370 | NTNCWS | Honolulu | 50 | Honolulu County |
| Papaikou | HI0000107 | CWS | Hilo | 2,203 | Hawaii County |
| Pepeekeo | HI0000106 | CWS | Hilo | 1,450 | Hawaii County |
| Pepeekeo Water Association | HI0000167 | CWS | Hilo | 60 | Hawaii County |
| Poamoho | HI0000371 | CWS | Honolulu | 25 | Honolulu County |
| Pulehunui Water Association | HI0000264 | NTNCWS | Wailuku | 10 | Maui County |
| Punalu'U | HI0000114 | CWS | Honolulu | 200 | Hawaii County |
| Sheraton Hotels | HI0000330 | NTNCWS | Honolulu | 2,830 | Honolulu County |
| St Stephen'S Diocesan Ctr | HI0000314 | NTNCWS | Honolulu | 45 | Honolulu County |
| The Queen'S Medical Center West Oahu | HI0000373 | NTNCWS | Ewa Beach | 800 | Honolulu County |
| Ualapue | HI0000233 | CWS | Wailuku | 1,119 | Maui County |
| Villa Rose | HI0000374 | CWS | Wailuku | 30 | Honolulu County |
| Waiahole | HI0000368 | CWS | Honolulu | 300 | Honolulu County |
| Waialua Sugar Pump 2 | HI0000309 | CWS | Wahiawa | 400 | Honolulu County |
| Waiawa Correctional Facility | HI0000348 | CWS | Pearl City | 444 | Honolulu County |
| Waiki'I Ranch | HI0000162 | CWS | Kamuela | 102 | Hawaii County |
| Waimano Ridge | HI0000306 | NTNCWS | Honolulu | 545 | Honolulu County |
| Waiohinu-Naalehu | HI0000108 | CWS | Hilo | 2,948 | Hawaii County |
| West Kuiaha Meadows | HI0000252 | CWS | Wailuku | 60 | Maui County |
| Wood Valley | HI0000166 | CWS | Pahala | 75 | Hawaii County |
| Woodlands At Nuuanu | HI0000372 | CWS | Honolulu | 48 | Honolulu County |