Honolulu
Is Honolulu tap water safe to drink?
Mostly yes — Honolulu scores 88/100. This report aggregates EPA drinking water data across 1 local system in Honolulu. We found 0 total violations (0 unresolved).
🛡️ Home Water Treatment Needs
Should you invest in filtration or softening for your home in Honolulu?
Expert Advice
Your water quality is excellent. Standard filtration is optional but can further enhance taste.
Buying a Filter?
Should you buy a water purifier in Honolulu? See our analysis.
Baby Formula Safety
Is Honolulu tap water safe for infants? Critical safety guide.
Homebuyer's Perspective
For those looking to relocate to Honolulu, water quality is a key factor in long-term property maintenance. The high safety score (88/100) suggests lower risk for plumbing corrosion and appliance scaling.
Health & Family Safety
Residents should monitor Tetrachloroethylene (PCE) levels. Pregnant women and families with young children should consult the specific EPA health goals listed below.
View Health Risk Glossary →Score Breakdown for Honolulu
*Scores are calculated using weighted EPA monitoring data from the past 5 years.
Frequently Asked Questions
Is Honolulu tap water safe to drink?
Mostly yes — Honolulu scores 88/100.
How many water systems serve Honolulu?
Honolulu is served by 1 public water system in our latest EPA-backed dataset.
How can I check water quality for my exact address in Honolulu?
Use the WaterQ search tool to look up your ZIP code and view nearby systems, contaminant levels, and recent violations for Honolulu.
What is the water quality score for Honolulu?
The water quality score for Honolulu is N/A out of 100, based on EPA contaminant data, violation history, and testing results for all serving water systems.
What are the top contaminants in Honolulu?
The top contaminants detected in Honolulu include Tetrachloroethylene (PCE), Chloramine, Gross Alpha Particle Activity. View detailed information on our contaminants page.
Honolulu Water Quality Summary
Honolulu, HI receives a water quality score of 88/100 (Grade B) based on EPA Safe Drinking Water Information System (SDWIS) compliance data for 14 public water systems serving the area.
Honolulu's water quality is above the national average, with strong compliance records and low contaminant levels. Residents generally receive clean, safe tap water that meets EPA standards.
Water quality data is sourced from the U.S. EPA SDWIS database and updated quarterly. Learn about our scoring methodology →
Key Contaminants
Water Systems Serving Honolulu (1)
Check Your Specific Address
Water quality can vary by neighborhood in Honolulu.
Related
Quick compare in Hawaii
Compare Honolulu water quality: View all states · Contaminant library · How we score water quality