A95/100
WOODINVILLE WATER DISTRICT — Water Quality Report 2026
Serving 59,873 people · Washington
Water Source
Purchased Surface Water
County
—
System ID
WA5341600
Violations
5
Contaminant Test Results
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2015.
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 WOODINVILLE WATER DISTRICT
Is WOODINVILLE WATER DISTRICT water safe to drink?
WOODINVILLE WATER DISTRICT water receives a grade of A (95/100), which is considered excellent. Out of 68 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has WOODINVILLE WATER DISTRICT detected?
68 contaminants were tested in WOODINVILLE WATER DISTRICT's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does WOODINVILLE WATER DISTRICT have any EPA violations?
Yes, WOODINVILLE WATER DISTRICT has 5 EPA violation(s) on record, with the most recent in 2015. Violation types include Other.
How many people does WOODINVILLE WATER DISTRICT serve?
WOODINVILLE WATER DISTRICT serves approximately 59,873 people, Washington.
What type of water does WOODINVILLE WATER DISTRICT provide?
WOODINVILLE 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 WA5341600.
How does WOODINVILLE WATER DISTRICT compare to other utilities in Washington?
WOODINVILLE WATER DISTRICT scores 95/100 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.