A100/100
TUKWILA WATER DEPARTMENT — Water Quality Report 2026
Serving 45,374 people · Washington
Water Source
Purchased Surface Water
County
—
System ID
WA5389500
Violations
0
Contaminant Test Results
EPA Violation History
No violations in the past 5 years
This system has a clean compliance history.
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 TUKWILA WATER DEPARTMENT
Is TUKWILA WATER DEPARTMENT water safe to drink?
TUKWILA WATER DEPARTMENT water receives a grade of A (100/100), which is considered excellent. Out of 30 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has TUKWILA WATER DEPARTMENT detected?
30 contaminants were tested in TUKWILA WATER DEPARTMENT's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does TUKWILA WATER DEPARTMENT have any EPA violations?
No, TUKWILA WATER DEPARTMENT has zero EPA violations on record. This indicates consistent compliance with federal drinking water standards.
How many people does TUKWILA WATER DEPARTMENT serve?
TUKWILA WATER DEPARTMENT serves approximately 45,374 people, Washington.
What type of water does TUKWILA WATER DEPARTMENT provide?
TUKWILA WATER DEPARTMENT 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 WA5389500.
How does TUKWILA WATER DEPARTMENT compare to other utilities in Washington?
TUKWILA WATER DEPARTMENT scores 100/100 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.