F0/100
MAKAWAO — Water Quality Report 2026
Serving 29,868 people · Hawaii
Water Source
Surface Water
County
—
System ID
HI0000213
Violations
100
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
chlorate | 270.00 µg/L | — | Above Goal |
Lead (90th percentile) | < 0.001 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2020.
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 MAKAWAO
Is MAKAWAO water safe to drink?
MAKAWAO water receives a grade of F (0/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 100 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has MAKAWAO detected?
69 contaminants were tested in MAKAWAO's water. Notable contaminants include Lead (90th percentile), chlorate. No contaminants exceed EPA legal limits. 2 exceed EPA health goals (MCLGs).
Does MAKAWAO have any EPA violations?
Yes, MAKAWAO has 100 EPA violation(s) on record, with the most recent in 2020. Violation types include TT, MR, MCL. 83 are health-based violations.
How many people does MAKAWAO serve?
MAKAWAO serves approximately 29,868 people, Hawaii. The system provides water to 1 community: Makawao.
What type of water does MAKAWAO provide?
MAKAWAO sources its water from surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is HI0000213.
How does MAKAWAO compare to other utilities in Hawaii?
MAKAWAO scores 0/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our Hawaii state page for a full comparison of water systems.