C54/100
CLARK PUBLIC UTILITIES — Water Quality Report 2026
Serving 116,876 people · Washington
Water Source
Groundwater
County
—
System ID
WA5313333
Violations
43
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
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 CLARK PUBLIC UTILITIES
Is CLARK PUBLIC UTILITIES water safe to drink?
CLARK PUBLIC UTILITIES water receives a grade of C (54/100), which is considered fair. 0 contaminant(s) exceed EPA legal limits and 43 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has CLARK PUBLIC UTILITIES detected?
73 contaminants were tested in CLARK PUBLIC UTILITIES's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does CLARK PUBLIC UTILITIES have any EPA violations?
Yes, CLARK PUBLIC UTILITIES has 43 EPA violation(s) on record, with the most recent in 2022. Violation types include MR, Other.
How many people does CLARK PUBLIC UTILITIES serve?
CLARK PUBLIC UTILITIES serves approximately 116,876 people, Washington.
What type of water does CLARK PUBLIC UTILITIES provide?
CLARK PUBLIC UTILITIES sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WA5313333.
How does CLARK PUBLIC UTILITIES compare to other utilities in Washington?
CLARK PUBLIC UTILITIES scores 54/100 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.