A92/100
NE SAMMAMISH SEWER & WATER DISTRICT — Water Quality Report 2026
Serving 8,516 people · Washington
Water Source
Groundwater
County
—
System ID
WA5375265
Violations
8
Contaminant Test Results
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Exceeded the MCL for disinfection byproducts
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: January 1, 2022 – December 31, 2022Enforcement: Resolving — corrective action underway
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 NE SAMMAMISH SEWER & WATER DISTRICT
Is NE SAMMAMISH SEWER & WATER DISTRICT water safe to drink?
NE SAMMAMISH SEWER & WATER DISTRICT water receives a grade of A (92/100), which is considered excellent. Out of 31 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has NE SAMMAMISH SEWER & WATER DISTRICT detected?
31 contaminants were tested in NE SAMMAMISH SEWER & WATER DISTRICT's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does NE SAMMAMISH SEWER & WATER DISTRICT have any EPA violations?
Yes, NE SAMMAMISH SEWER & WATER DISTRICT has 8 EPA violation(s) on record, with the most recent in 2022. Violation types include MR.
How many people does NE SAMMAMISH SEWER & WATER DISTRICT serve?
NE SAMMAMISH SEWER & WATER DISTRICT serves approximately 8,516 people, Washington.
What type of water does NE SAMMAMISH SEWER & WATER DISTRICT provide?
NE SAMMAMISH SEWER & WATER DISTRICT sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WA5375265.
How does NE SAMMAMISH SEWER & WATER DISTRICT compare to other utilities in Washington?
NE SAMMAMISH SEWER & WATER DISTRICT scores 92/100 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.