Honolulu, Hawaii Water Quality Report
Comprehensive analysis of tap water safety based on EPA data
Last updated: January 2026
Is Honolulu's Water Safe to Drink?
Generally Safe. Honolulu's tap water meets EPA standards for drinking water quality. The water scored 97/100 in our analysis.
Contaminants Found in Honolulu's Water
1 contaminants tested • Data from EPA SDWIS database
| Contaminant | Level Detected | EPA Limit | % of Limit | Status |
|---|---|---|---|---|
Lead | 0 mg/L | 0.015 mg/L | 0.0% | Safe |
About Honolulu's Water System
HNL-WINDWARD-PEARL HARBOR
- PWS ID:
- HI0000331
- Population Served:
- 631,389
- Water Source:
- ground
A+97/100
Honolulu Water Quality Score
Based on EPA contaminant data and compliance records
100
Contaminants
100
Compliance
85
Infrastructure
Positive Findings
- Excellent overall water quality
- No recorded violations
- All tested contaminants well below EPA limits
- Low lead levels detected
Protect Your Family's Water
Even with good water quality, many families choose to filter their water for extra peace of mind.
Affiliate links - we may earn a commission
Other Cities in Hawaii
Compare water quality with nearby cities.
View all Hawaii cities →Frequently Asked Questions
- Where does Honolulu's water come from?
- Honolulu primarily uses ground water sources.
- How often is Honolulu's water tested?
- Water utilities are required to test for contaminants regularly and report results to the EPA.
- Should I use a water filter in Honolulu?
- While the water meets EPA standards, many families choose filters for extra peace of mind.