F0/100
CATHLAMET WATER DEPT — Water Quality Report 2026
Serving 1,636 people · Washington
Water Source
Surface Water
County
—
System ID
WA5311850
Violations
182
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.70 mg/L | 1.30 mg/L | Over Limit |
Lead (90th percentile) | 0.001 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
4
Violations (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Failed to complete routine monitoring
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: September 1, 2025 – September 30, 2025Rule: Surface Water Treatment RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2025 – September 25, 2025Enforcement: Resolving — corrective action underway
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2024 – February 19, 2025Enforcement: Resolving — corrective action underway
TIER 3Resolved
Failed to complete routine monitoring
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 1, 2022 – July 31, 2022Rule: Surface Water Treatment RuleEnforcement: 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 CATHLAMET WATER DEPT
Is CATHLAMET WATER DEPT water safe to drink?
CATHLAMET WATER DEPT water receives a grade of F (0/100), which is considered failing. 1 contaminant(s) exceed EPA legal limits and 182 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has CATHLAMET WATER DEPT detected?
2 contaminants were tested in CATHLAMET WATER DEPT's water. Notable contaminants include Copper (90th percentile), Lead (90th percentile). 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does CATHLAMET WATER DEPT have any EPA violations?
Yes, CATHLAMET WATER DEPT has 182 EPA violation(s) on record, with the most recent in 2025. Violation types include MR, Other, TT. 60 are health-based violations.
How many people does CATHLAMET WATER DEPT serve?
CATHLAMET WATER DEPT serves approximately 1,636 people, Washington.
What type of water does CATHLAMET WATER DEPT provide?
CATHLAMET WATER DEPT 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 WA5311850.
How does CATHLAMET WATER DEPT compare to other utilities in Washington?
CATHLAMET WATER DEPT 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.