F0/100
WINLOCK CITY OF — Water Quality Report 2026
Serving 3,502 people · Washington
Water Source
Groundwater
County
—
System ID
WA5397500
Violations
142
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2014.
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 WINLOCK CITY OF
Is WINLOCK CITY OF water safe to drink?
WINLOCK CITY OF water receives a grade of F (0/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 142 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has WINLOCK CITY OF detected?
1 contaminants were tested in WINLOCK CITY OF's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does WINLOCK CITY OF have any EPA violations?
Yes, WINLOCK CITY OF has 142 EPA violation(s) on record, with the most recent in 2014. Violation types include Other, MR, MCL. 2 are health-based violations.
How many people does WINLOCK CITY OF serve?
WINLOCK CITY OF serves approximately 3,502 people, Washington.
What type of water does WINLOCK CITY OF provide?
WINLOCK CITY OF sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WA5397500.
How does WINLOCK CITY OF compare to other utilities in Washington?
WINLOCK CITY OF scores 0/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our Washington state page for a full comparison of water systems.