F17/100
OAKVILLE CITY OF — Water Quality Report 2026
Serving 1,325 people · Washington
Water Source
Groundwater
County
—
System ID
WA5362750
Violations
64
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.60 mg/L | 1.30 mg/L | Over Limit |
Lead (90th percentile) | 0.006 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2016.
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 OAKVILLE CITY OF
Is OAKVILLE CITY OF water safe to drink?
OAKVILLE CITY OF water receives a grade of F (17/100), which is considered failing. 1 contaminant(s) exceed EPA legal limits and 64 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has OAKVILLE CITY OF detected?
2 contaminants were tested in OAKVILLE 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 OAKVILLE CITY OF have any EPA violations?
Yes, OAKVILLE CITY OF has 64 EPA violation(s) on record, with the most recent in 2016. Violation types include MR, MCL, Other. 2 are health-based violations.
How many people does OAKVILLE CITY OF serve?
OAKVILLE CITY OF serves approximately 1,325 people, Washington.
What type of water does OAKVILLE CITY OF provide?
OAKVILLE CITY OF sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WA5362750.
How does OAKVILLE CITY OF compare to other utilities in Washington?
OAKVILLE CITY OF scores 17/100 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.