A91/100
WAIPAHU-EWA-WAIANAE — Water Quality Report 2026
Serving 217,479 people · Hawaii
Water Source
Groundwater
County
—
System ID
HI0000335
Violations
6
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
vanadium | 26.00 µg/L | — | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2012.
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Frequently Asked Questions About WAIPAHU-EWA-WAIANAE
Is WAIPAHU-EWA-WAIANAE water safe to drink?
WAIPAHU-EWA-WAIANAE water receives a grade of A (91/100), which is considered excellent. Out of 73 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has WAIPAHU-EWA-WAIANAE detected?
73 contaminants were tested in WAIPAHU-EWA-WAIANAE's water. Notable contaminants include vanadium. No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does WAIPAHU-EWA-WAIANAE have any EPA violations?
Yes, WAIPAHU-EWA-WAIANAE has 6 EPA violation(s) on record, with the most recent in 2012. Violation types include MR.
How many people does WAIPAHU-EWA-WAIANAE serve?
WAIPAHU-EWA-WAIANAE serves approximately 217,479 people, Hawaii. The system provides water to 1 community: Waipahu-Ewa-Waianae.
What type of water does WAIPAHU-EWA-WAIANAE provide?
WAIPAHU-EWA-WAIANAE sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is HI0000335.
How does WAIPAHU-EWA-WAIANAE compare to other utilities in Hawaii?
WAIPAHU-EWA-WAIANAE scores 91/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our Hawaii state page for a full comparison of water systems.