C53/100
SUNNYSIDE CITY OF — Water Quality Report 2026
Serving 17,037 people · Washington
Water Source
Groundwater
County
—
System ID
WA5385400
Violations
33
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
chlorate | 310.00 µg/L | — | Above Goal |
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
Surface water treatment technique failure
When: July 1, 2025 – September 25, 2025Enforcement: Resolving — corrective action underway
TIER 3Resolved
Monitoring Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: February 1, 2024 – February 29, 2024Rule: Total Coliform 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 SUNNYSIDE CITY OF
Is SUNNYSIDE CITY OF water safe to drink?
SUNNYSIDE CITY OF water receives a grade of C (53/100), which is considered fair. 0 contaminant(s) exceed EPA legal limits and 33 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has SUNNYSIDE CITY OF detected?
66 contaminants were tested in SUNNYSIDE CITY OF's water. Notable contaminants include Lead (90th percentile), chlorate. No contaminants exceed EPA legal limits. 2 exceed EPA health goals (MCLGs).
Does SUNNYSIDE CITY OF have any EPA violations?
Yes, SUNNYSIDE CITY OF has 33 EPA violation(s) on record, with the most recent in 2025. Violation types include Other, MON, MR. 2 are health-based violations.
How many people does SUNNYSIDE CITY OF serve?
SUNNYSIDE CITY OF serves approximately 17,037 people, Washington.
What type of water does SUNNYSIDE CITY OF provide?
SUNNYSIDE CITY OF sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WA5385400.
How does SUNNYSIDE CITY OF compare to other utilities in Washington?
SUNNYSIDE CITY OF scores 53/100 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.