By State · HI
Based on EPA UCMR 5 testing of 2 public water systems with PFAS detected in Hawaii.
See Hawaii on the national heatmapState totals reflect systems with at least one PFAS detection in UCMR 5 (the canonical EPA dataset). The 6,151 national total includes ~123 additional systems in US territories and on tribal lands not browsable as state pages.
State context
Industrial context
Hawaii's PFAS exposure is concentrated around military installations on Oahu — most prominently the Red Hill fuel storage facility and Joint Base Pearl Harbor-Hickam, where AFFF use over decades has documented PFAS impacts to the Pearl Harbor aquifer.
Regulatory stance
Hawaii follows the federal EPA framework. The state Department of Health monitors PFAS through the state Environmental Health Administration but has not promulgated state-level MCLs.
Notable sites
The Navy's 2021 Red Hill fuel release brought renewed scrutiny to PFAS contamination in the Oahu aquifer, with affected wells documented in subsequent state and Navy testing.
Editorial summary compiled from public DoD, EPA, and state agency disclosures. Not a comprehensive site inventory — for the authoritative list of PFAS investigation locations in Hawaii, consult your state environmental agency.
Systems with detections · EPA UCMR 5 (2023–2025)
Get specific results for your neighborhood's water utility.
City overviews aggregate every utility and ZIP code in the area. Don't see your city? Use the ZIP lookup above — every Hawaii ZIP has a result.
| Water System ↕ | PWSID | PFAS Detected ↕ | Above MCL ↕ | Risk |
|---|---|---|---|---|
| HNL-WINDWARD-PEARL HARBOR Groundwater | HI0000331 | 1 | 0 | Low Level |
| WAIPAHU-EWA-WAIANAE Groundwater | HI0000335 | 1 | 0 | Low Level |
Click any row to see ZIP-level details. Click PWSID to see the full utility page.
Test your water
EPA UCMR 5 tested 2 public water systems in Hawaii — but at the utility entry point, not your tap. Aging pipes and indoor plumbing can change what reaches your home, and private wells aren't covered by UCMR 5 at all. To find out what's actually in your water, test it with a certified lab.
How PFAS water testing works
EPA Method 537.1 in plain English — what a certified lab actually measures
Order a certified mail-in test kit
PFAS mail-in kits from about $85 (Cyclopure, Tap Score)
On a private well in Hawaii?
Wells aren't covered by EPA testing — your own testing guide
Hawaii testing resources
Compiled from official Hawaii state sources. Programs and eligibility change — confirm current details with the agency.
