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CheckYourWater

PFAS Testing Results

Hawaii

PFAS testing results for 45 water systems serving 1,459,539 residents.

No water systems in Hawaii exceeded federal PFAS limits in EPA testing.

Systems tested

45

4.4% had PFAS detections

Limits exceeded

0

0.0% of systems

Population affected

0

served by systems over federal limits

Most common compound

11Cl-PF3OUdS

detected in 2 systems

Grade distribution

Every water system gets a letter grade based on how its worst detected PFAS compound compares to the federal Maximum Contaminant Level. Lower grades mean higher contamination.

A — 43 systems (95.6%)
B — 2 systems (4.4%)
C — 0 systems (0.0%)
D — 0 systems (0.0%)
F — 0 systems (0.0%)

How grades are calculated →

What Hawaii is doing about PFAS

As of April 2026, Hawaii has not adopted state-level PFAS drinking water standards beyond the federal EPA limits finalized in April 2024. The Hawaii Department of Health has been engaged with the Navy on PFAS contamination near the Red Hill fuel facility on Oahu and at former military airfields on several islands, where AFFF firefighting foam releases have affected groundwater.

Public water systems in Hawaii are subject to the federal compliance timeline requiring initial monitoring by 2027 and treatment installation by 2029.

Based on Hawaii Department of Health publications.

All 45 tested water systems in Hawaii

Sorted from lowest grade to highest. Click any system name for the full report. Filter by city or name with the search box below.

Showing 45 of 45 systems

GradeSystem nameCityWorst compoundvs. EPA limitPopulation
HNL-WINDWARD-PEARL HARBORHONOLULUPFHxSBelow federal limit631K
WAIPAHU-EWA-WAIANAEHONOLULUPFPeABelow detection217K
HILOHILO-Below detection39K
OLAA-MOUNTAIN VIEWHILO-Below detection6.5K
HAWAIIAN BEACHESPAHOA-Below detection3.5K
NORTH KOHALAHILO-Below detection4.9K
SOUTH KOHALAHILO-Below detection9.6K
NORTH KONAHILO-Below detection30K
SOUTH KONAHILO-Below detection6.5K
WAIKOLOAWAIKOLOA-Below detection12K
HAWAII VOLCANOES NAT.PARKHAWAII NATIONAL PARK-Below detection4.2K
KOHALA RANCH WATER CO.KAMUELA-Below detection850
HAINAHILO-Below detection4.6K
KAPALUAKAPALUA-Below detection4.2K
KAANAPALIWAIKOLOA-Below detection8.0K
WAILUKUWAILUKU-Below detection75K
MAKAWAOWAILUKU-Below detection30K
LAHAINAWAILUKU-Below detection20K
UPPER KULAWAILUKU-Below detection7.7K
KEANAEWAILUKU-Below detection270
KAUNAKAKAIWAILUKU-Below detection3.7K
LOWER KULAWAILUKU-Below detection3.5K
THE QUEEN'S MEDICAL CENTERHONOLULU-Below detection3.4K
KAMEHAMEHA SCHOOLSHONOLULU-Below detection4.0K
PUNAHOU SCHOOLHONOLULU-Below detection4.0K
LAIE WATER COMPANYLAIE-Below detection5.6K
WAIALUAHONOLULU-Below detection10.0K
WAHIAWAHONOLULU-Below detection23K
WAIPIO HEIGHTSHONOLULU-Below detection12K
ALIAMANUSCHOFIELD BARRACKS-Below detection6.4K
FORT SHAFTERSCHOFIELD BARRACKS-Below detection7.1K
SCHOFIELD BARRACKSSCHOFIELD BARRACKS-Below detection38K
TRIPLER ARMY MEDICAL CNTRSCHOFIELD BARRACKS-Below detection5.6K
BARBERS POINTWAIKOLOA-Below detection5.3K
MARINE CORPS BASE HAWAIIKANEOHE BAY-Below detection16K
NCTAMS EASTPACJBPPH-Below detection6.5K
JOINT BASE PEARL HARBOR-HICKAMJBPPH-Below detection65K
WAIALEE-SUNSET BEACHHONOLULU-Below detection4.9K
MILILANIHONOLULU-Below detection51K
LIHUE-KAPAALIHUE-Below detection35K
HANAPEPE-ELEELELIHUE-Below detection5.6K
KEKAHA-WAIMEALIHUE-Below detection6.0K
KILAUEALIHUE-Below detection3.4K
PRINCEVILLEPRINCEVILLE-Below detection6.9K
KALAHEO-KOLOALIHUE-Below detection13K

Check your water system

Enter your zip code to see the PFAS results for the water system that serves your home.

Where this data comes from

  • EPA Unregulated Contaminant Monitoring Rule, 5th cycle (UCMR 5)
  • Testing period: 2023 to 2026
  • Federal limits: EPA Maximum Contaminant Levels finalized April 2024
  • Read the full methodology