A89/100
GRAND COULEE WATER DEPT CITY OF — Water Quality Report 2026
Serving 1,428 people · Washington
Water Source
Purchased Groundwater
County
—
System ID
WA5328700
Violations
4
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.003 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2010.
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 GRAND COULEE WATER DEPT CITY OF
Is GRAND COULEE WATER DEPT CITY OF water safe to drink?
GRAND COULEE WATER DEPT CITY OF water receives a grade of A (89/100), which is considered excellent. Out of 1 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has GRAND COULEE WATER DEPT CITY OF detected?
1 contaminants were tested in GRAND COULEE WATER DEPT CITY OF's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does GRAND COULEE WATER DEPT CITY OF have any EPA violations?
Yes, GRAND COULEE WATER DEPT CITY OF has 4 EPA violation(s) on record, with the most recent in 2010. Violation types include Other, MR, TT. 1 are health-based violations.
How many people does GRAND COULEE WATER DEPT CITY OF serve?
GRAND COULEE WATER DEPT CITY OF serves approximately 1,428 people, Washington.
What type of water does GRAND COULEE WATER DEPT CITY OF provide?
GRAND COULEE WATER DEPT CITY OF sources its water from purchased groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WA5328700.
How does GRAND COULEE WATER DEPT CITY OF compare to other utilities in Washington?
GRAND COULEE WATER DEPT CITY OF scores 89/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our Washington state page for a full comparison of water systems.