A94/100
KALAHEO-KOLOA — Water Quality Report 2026
Serving 12,660 people · Hawaii
Water Source
Groundwater
County
—
System ID
HI0000434
Violations
3
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
vanadium | 34.00 µg/L | — | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2000.
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 KALAHEO-KOLOA
Is KALAHEO-KOLOA water safe to drink?
KALAHEO-KOLOA water receives a grade of A (94/100), which is considered excellent. Out of 66 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has KALAHEO-KOLOA detected?
66 contaminants were tested in KALAHEO-KOLOA's water. Notable contaminants include vanadium. No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does KALAHEO-KOLOA have any EPA violations?
Yes, KALAHEO-KOLOA has 3 EPA violation(s) on record, with the most recent in 2000. Violation types include MR.
How many people does KALAHEO-KOLOA serve?
KALAHEO-KOLOA serves approximately 12,660 people, Hawaii. The system provides water to 1 community: Kalaheo.
What type of water does KALAHEO-KOLOA provide?
KALAHEO-KOLOA sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is HI0000434.
How does KALAHEO-KOLOA compare to other utilities in Hawaii?
KALAHEO-KOLOA scores 94/100 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.