B77/100
Columbia Valley Water District — Water Quality Report 2026
Serving 2,648 people · Washington
Water Source
Groundwater
County
—
System ID
WA5366110
Violations
20
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
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 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 Columbia Valley Water District
Is Columbia Valley Water District water safe to drink?
Columbia Valley Water District water receives a grade of B (77/100), which is considered good. Out of 31 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has Columbia Valley Water District detected?
31 contaminants were tested in Columbia Valley Water District's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does Columbia Valley Water District have any EPA violations?
Yes, Columbia Valley Water District has 20 EPA violation(s) on record, with the most recent in 2016. Violation types include Other, MR.
How many people does Columbia Valley Water District serve?
Columbia Valley Water District serves approximately 2,648 people, Washington.
What type of water does Columbia Valley Water District provide?
Columbia Valley Water District sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WA5366110.
How does Columbia Valley Water District compare to other utilities in Washington?
Columbia Valley Water District scores 77/100 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.