B75/100
COLVILLE WATER DEPARTMENT — Water Quality Report 2026
Serving 4,955 people · Washington
Water Source
Groundwater
County
—
System ID
WA5314200
Violations
6
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.001 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2024 – March 7, 2025Enforcement: 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 COLVILLE WATER DEPARTMENT
Is COLVILLE WATER DEPARTMENT water safe to drink?
COLVILLE WATER DEPARTMENT water receives a grade of B (75/100), 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 COLVILLE WATER DEPARTMENT detected?
31 contaminants were tested in COLVILLE WATER DEPARTMENT's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does COLVILLE WATER DEPARTMENT have any EPA violations?
Yes, COLVILLE WATER DEPARTMENT has 6 EPA violation(s) on record, with the most recent in 2024. Violation types include Other, MCL, MR. 4 are health-based violations.
How many people does COLVILLE WATER DEPARTMENT serve?
COLVILLE WATER DEPARTMENT serves approximately 4,955 people, Washington.
What type of water does COLVILLE WATER DEPARTMENT provide?
COLVILLE WATER DEPARTMENT sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WA5314200.
How does COLVILLE WATER DEPARTMENT compare to other utilities in Washington?
COLVILLE WATER DEPARTMENT 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.