A82/100
HIGHLINE WATER DISTRICT — Water Quality Report 2026
Serving 115,950 people · Washington
Water Source
Purchased Surface Water
County
—
System ID
WA5340650
Violations
3
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.005 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 1992.
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 HIGHLINE WATER DISTRICT
Is HIGHLINE WATER DISTRICT water safe to drink?
HIGHLINE WATER DISTRICT water receives a grade of A (82/100), which is considered excellent. Out of 69 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has HIGHLINE WATER DISTRICT detected?
69 contaminants were tested in HIGHLINE WATER DISTRICT's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does HIGHLINE WATER DISTRICT have any EPA violations?
Yes, HIGHLINE WATER DISTRICT has 3 EPA violation(s) on record, with the most recent in 1992. Violation types include MCL. 3 are health-based violations.
How many people does HIGHLINE WATER DISTRICT serve?
HIGHLINE WATER DISTRICT serves approximately 115,950 people, Washington.
What type of water does HIGHLINE WATER DISTRICT provide?
HIGHLINE WATER DISTRICT sources its water from purchased surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is WA5340650.
How does HIGHLINE WATER DISTRICT compare to other utilities in Washington?
HIGHLINE WATER DISTRICT scores 82/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our Washington state page for a full comparison of water systems.