D23/100
YAKIMA WATER DIVISION CITY OF — Water Quality Report 2026
Serving 112,858 people · Washington
Water Source
Surface Water
County
—
System ID
WA5399150
Violations
57
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.60 mg/L | 1.30 mg/L | Over Limit |
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2024 – September 26, 2024Enforcement: 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 YAKIMA WATER DIVISION CITY OF
Is YAKIMA WATER DIVISION CITY OF water safe to drink?
YAKIMA WATER DIVISION CITY OF water receives a grade of D (23/100), which is considered poor. 1 contaminant(s) exceed EPA legal limits and 57 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has YAKIMA WATER DIVISION CITY OF detected?
77 contaminants were tested in YAKIMA WATER DIVISION CITY OF's water. Notable contaminants include Copper (90th percentile). 1 exceed EPA legal limits (MCLs). 1 exceed EPA health goals (MCLGs).
Does YAKIMA WATER DIVISION CITY OF have any EPA violations?
Yes, YAKIMA WATER DIVISION CITY OF has 57 EPA violation(s) on record, with the most recent in 2024. Violation types include Other, MR, TT. 3 are health-based violations.
How many people does YAKIMA WATER DIVISION CITY OF serve?
YAKIMA WATER DIVISION CITY OF serves approximately 112,858 people, Washington.
What type of water does YAKIMA WATER DIVISION CITY OF provide?
YAKIMA WATER DIVISION 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 WA5399150.
How does YAKIMA WATER DIVISION CITY OF compare to other utilities in Washington?
YAKIMA WATER DIVISION CITY OF scores 23/100 with a grade of D (poor). This score suggests significant water quality concerns relative to other utilities. Visit our Washington state page for a full comparison of water systems.