Water & Air Quality in Hawaii
Regional composite data for PFAS, lead, and PM2.5 in Hawaii. Values are derived from EPA UCMR 5, EWG Tap Water Database, and AirNow annual averages. Check your specific ZIP code below for localized results.
PFAS
Lead
PM2.5
Hawaii Context
Pristine deep aquifers; military AFFF affected Red Hill area near Pearl Harbor.
Check Your Specific ZIP Code in Hawaii
State averages mask wide local variation. Your ZIP code may be significantly cleaner or more contaminated than the state composite — especially near industrial sites, military bases, or older housing stock.
Audit Hawaii ZIP 96813 →Or go to the home page and enter any Hawaii ZIP code.
What These Numbers Mean for Hawaii Residents
PFAS in Hawaii Drinking Water
Hawaii's regional PFAS composite is 0.8 parts per trillion (ppt), which is at or below the EPA's 2024 enforceable limit of 4 ppt for PFOA and PFOS. That said, the EPA limit reflects what's technically achievable — the agency's health goal is zero, and any PFAS exposure carries some risk given their persistence in the body.
Lead in Hawaii Tap Water
Lead contamination in Hawaii averages 1.1 ppb at the 90th percentile. This is within the EPA's action level but above the zero health goal. Lead pipes in pre-1986 homes remain the primary risk factor — consider an NSF 53-certified filter as a precaution.
PM2.5 Air Quality in Hawaii
Hawaii's annual average PM2.5 is 5 µg/m³. This is below both the EPA annual standard (9 µg/m³) and approaches the WHO guideline (5 µg/m³). Running a HEPA air purifier indoors can bring indoor air below the WHO threshold even in areas with clean outdoor air.
Filtration Recommendations for Hawaii
Hawaii Water & Air Resources
Want to go deeper? Read our evidence-based articles on PFAS health effects, water filter comparisons, and PM2.5 air quality. Or audit your specific ZIP code for localized results.