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WATER QUALITY REPORT

Honolulu, HI Tap Water Quality

What EPA data, PFAS monitoring, and independent health research reveals about Honolulu's drinking water -- and what you can do about it.

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HIGH CONCERN
Based on EPA violations and contaminant profile
KNOWN WATER ISSUES -- HONOLULU, HI
âš Agricultural pesticide runoff
âš Red Hill fuel contamination
âš PFAS from military
WHAT YOU SHOULD KNOW
1

The 2021 Red Hill fuel spill contaminated the Navy's groundwater system -- affecting thousands.

2

Hawaii's agricultural history left pesticide residues (including TCP) in some groundwater sources.

3

Military PFAS contamination is a documented issue on Oahu, particularly near Pearl Harbor.

4

Certified RO handles pesticide residues, PFAS, and fuel contamination byproducts.

WATER SYSTEM -- EPA SDWIS
System Name
Honolulu Board of Water Supply
EPA PWSID
HI0000102
Population Served
350K
State
HI
COMMON QUESTIONS
Is Honolulu tap water safe to drink?

Honolulu water meets EPA legal standards but meeting standards is not the same as being free of contaminants. EPA limits are set based on feasibility, not always on what is safest for health. Enter your ZIP above to see the full violation history and PFAS data for your specific water system.

Do I need a water filter?

Even compliant water can contain contaminants at levels above what independent health scientists consider safe -- particularly for PFAS, lead, and chromium-6. An EPA-certified RO system removes 95-99% of all detected contaminants and costs $0.10-$0.25 per gallon, compared to $1-$3 for bottled water.

What's the best filter for this area?

For most US cities, a reverse osmosis system under the sink is the gold standard -- it removes lead, PFAS, arsenic, nitrates, fluoride, and virtually everything else. For renters, a Waterdrop D4 countertop RO requires zero installation. Enter your ZIP above to get personalized recommendations based on your actual water report.

Check your specific address

City-wide data is just the start. Enter your ZIP to see your exact water system's EPA report, PFAS levels, and violation history.

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