Drinking water / HI
PFAS in Hawaii drinking water
45 Hawaii public water systems tested under UCMR5. 2 detected at least one PFAS compound; 43 detected none at the reporting thresholds. Values are the highest single result per compound, in ng/L (parts per trillion). The federal limit for PFOA and PFOS is 4 ng/L.
| Water system | Serves | Highest results (ng/L) | Reading |
|---|---|---|---|
| HNL-WINDWARD-PEARL HARBOR HI0000331 | Honolulu | PFHxS 3 | detected |
| WAIPAHU-EWA-WAIANAE HI0000335 | Honolulu | PFPeA 3.3 | detected |
* exceeds the final federal MCL for that compound. Detections of compounds whose limits EPA proposed to rescind in May 2026 are shown for information.
Systems with no PFAS detected
43 tested systems reported no PFAS above the laboratory reporting limits. Each has its own page with its sampling detail.
- ALIAMANU
- BARBERS POINT
- FORT SHAFTER
- HAINA
- HANAPEPE-ELEELE
- HAWAII VOLCANOES NAT.PARK
- HAWAIIAN BEACHES
- HILO
- JOINT BASE PEARL HARBOR-HICKAM
- KAANAPALI
- KALAHEO-KOLOA
- KAMEHAMEHA SCHOOLS
- KAPALUA
- KAUNAKAKAI
- KEANAE
- KEKAHA-WAIMEA
- KILAUEA
- KOHALA RANCH WATER CO.
- LAHAINA
- LAIE WATER COMPANY
- LIHUE-KAPAA
- LOWER KULA
- MAKAWAO
- MARINE CORPS BASE HAWAII
- MILILANI
- NCTAMS EASTPAC
- NORTH KOHALA
- NORTH KONA
- OLAA-MOUNTAIN VIEW
- PRINCEVILLE
- PUNAHOU SCHOOL
- SCHOFIELD BARRACKS
- SOUTH KOHALA
- SOUTH KONA
- THE QUEEN'S MEDICAL CENTER
- TRIPLER ARMY MEDICAL CNTR
- UPPER KULA
- WAHIAWA
- WAIALEE-SUNSET BEACH
- WAIALUA
- WAIKOLOA
- WAILUKU
- WAIPIO HEIGHTS
A detection at the system level does not tell you what reaches one specific tap: levels vary by entry point, treatment train and plumbing. A certified lab test of your own tap settles it. Testing and treatment options