B75/100
RENTON CITY OF — Water Quality Report 2026
Serving 107,119 people · Washington
Water Source
Groundwater
County
—
System ID
WA5371850
Violations
14
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 3.30 mg/L | 1.30 mg/L | Over Limit |
Lead (90th percentile) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2006.
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 RENTON CITY OF
Is RENTON CITY OF water safe to drink?
RENTON CITY OF water receives a grade of B (75/100), which is considered good. Out of 67 contaminants tested, 1 exceed EPA legal limits. 2 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has RENTON CITY OF detected?
67 contaminants were tested in RENTON CITY OF's water. Notable contaminants include Copper (90th percentile), Lead (90th percentile). 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does RENTON CITY OF have any EPA violations?
Yes, RENTON CITY OF has 14 EPA violation(s) on record, with the most recent in 2006. Violation types include MR.
How many people does RENTON CITY OF serve?
RENTON CITY OF serves approximately 107,119 people, Washington.
What type of water does RENTON CITY OF provide?
RENTON CITY OF sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WA5371850.
How does RENTON CITY OF compare to other utilities in Washington?
RENTON CITY OF scores 75/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our Washington state page for a full comparison of water systems.