C45/100
CHEHALIS WATER DEPARTMENT — Water Quality Report 2026
Serving 11,426 people · Washington
Water Source
Surface Water
County
—
System ID
WA5312250
Violations
39
Contaminant Test Results
EPA Violation History
2
Violations (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2024 – February 19, 2025Enforcement: Resolving — corrective action underway
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2022 – June 30, 2023Enforcement: 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 CHEHALIS WATER DEPARTMENT
Is CHEHALIS WATER DEPARTMENT water safe to drink?
CHEHALIS WATER DEPARTMENT water receives a grade of C (45/100), which is considered fair. 0 contaminant(s) exceed EPA legal limits and 39 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has CHEHALIS WATER DEPARTMENT detected?
69 contaminants were tested in CHEHALIS WATER DEPARTMENT's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does CHEHALIS WATER DEPARTMENT have any EPA violations?
Yes, CHEHALIS WATER DEPARTMENT has 39 EPA violation(s) on record, with the most recent in 2024. Violation types include Other, MR, TT. 4 are health-based violations.
How many people does CHEHALIS WATER DEPARTMENT serve?
CHEHALIS WATER DEPARTMENT serves approximately 11,426 people, Washington.
What type of water does CHEHALIS WATER DEPARTMENT provide?
CHEHALIS WATER DEPARTMENT 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 WA5312250.
How does CHEHALIS WATER DEPARTMENT compare to other utilities in Washington?
CHEHALIS WATER DEPARTMENT scores 45/100 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.