A86/100
SEQUIM CITY OF — Water Quality Report 2026
Serving 14,293 people · Washington
Water Source
Groundwater
County
—
System ID
WA5377620
Violations
11
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.003 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2024 – February 19, 2025Enforcement: 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 SEQUIM CITY OF
Is SEQUIM CITY OF water safe to drink?
SEQUIM CITY OF water receives a grade of A (86/100), which is considered excellent. Out of 66 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has SEQUIM CITY OF detected?
66 contaminants were tested in SEQUIM CITY OF's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does SEQUIM CITY OF have any EPA violations?
Yes, SEQUIM CITY OF has 11 EPA violation(s) on record, with the most recent in 2024. Violation types include Other, MR.
How many people does SEQUIM CITY OF serve?
SEQUIM CITY OF serves approximately 14,293 people, Washington.
What type of water does SEQUIM CITY OF provide?
SEQUIM CITY OF sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WA5377620.
How does SEQUIM CITY OF compare to other utilities in Washington?
SEQUIM CITY OF scores 86/100 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.