C54/100
KENNEWICK CITY OF — Water Quality Report 2026
Serving 114,468 people · Washington
Water Source
Surface Water
County
—
System ID
WA5338100
Violations
7
Contaminant Test Results
5 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.40 mg/L | 1.30 mg/L | Over Limit |
PFOS | 0.011 µg/L | 0.004 µg/L | Over Limit |
PFHxS | 0.011 µg/L | 0.010 µg/L | Over Limit |
PFOA | 0.004 µg/L | 0.004 µg/L | Over Limit |
Lead (90th percentile) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
2
Violations (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: April 1, 2023 – June 30, 2023Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: April 1, 2023 – June 30, 2023Rule: Stage 2 DBPREnforcement: 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 KENNEWICK CITY OF
Is KENNEWICK CITY OF water safe to drink?
KENNEWICK CITY OF water receives a grade of C (54/100), which is considered fair. 4 contaminant(s) exceed EPA legal limits and 7 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has KENNEWICK CITY OF detected?
77 contaminants were tested in KENNEWICK CITY OF's water. Notable contaminants include PFOS, Copper (90th percentile), PFOA, PFHxS, Lead (90th percentile). 4 exceed EPA legal limits (MCLs). 5 exceed EPA health goals (MCLGs).
Does KENNEWICK CITY OF have any EPA violations?
Yes, KENNEWICK CITY OF has 7 EPA violation(s) on record, with the most recent in 2023. Violation types include MR, Other, MCL. 1 are health-based violations.
How many people does KENNEWICK CITY OF serve?
KENNEWICK CITY OF serves approximately 114,468 people, Washington.
What type of water does KENNEWICK CITY OF provide?
KENNEWICK CITY OF sources its water from surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is WA5338100.
How does KENNEWICK CITY OF compare to other utilities in Washington?
KENNEWICK CITY OF 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.