C46/100
SNOQUALMIE WATER — Water Quality Report 2026
Serving 15,848 people · Washington
Water Source
Groundwater
County
—
System ID
WA5381080
Violations
24
Contaminant Test Results
3 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 2.60 mg/L | 1.30 mg/L | Over Limit |
chlorate | 470.00 µg/L | — | Above Goal |
Lead (90th percentile) | 0.003 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2016.
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 SNOQUALMIE WATER
Is SNOQUALMIE WATER water safe to drink?
SNOQUALMIE WATER water receives a grade of C (46/100), which is considered fair. 1 contaminant(s) exceed EPA legal limits and 24 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has SNOQUALMIE WATER detected?
67 contaminants were tested in SNOQUALMIE WATER's water. Notable contaminants include Copper (90th percentile), Lead (90th percentile), chlorate. 1 exceed EPA legal limits (MCLs). 3 exceed EPA health goals (MCLGs).
Does SNOQUALMIE WATER have any EPA violations?
Yes, SNOQUALMIE WATER has 24 EPA violation(s) on record, with the most recent in 2016. Violation types include Other, MR, MCL. 4 are health-based violations.
How many people does SNOQUALMIE WATER serve?
SNOQUALMIE WATER serves approximately 15,848 people, Washington.
What type of water does SNOQUALMIE WATER provide?
SNOQUALMIE WATER sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WA5381080.
How does SNOQUALMIE WATER compare to other utilities in Washington?
SNOQUALMIE WATER scores 46/100 with a grade of C (fair). This score indicates room for improvement compared to other utilities. Visit our Washington state page for a full comparison of water systems.