A88/100
GRAND MOUND — Water Quality Report 2026
Serving 3,764 people · Washington
Water Source
Groundwater
County
—
System ID
WA5307158
Violations
4
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 3.69 mg/L | 1.30 mg/L | Over Limit |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2018.
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 MOUND
Is GRAND MOUND water safe to drink?
GRAND MOUND water receives a grade of A (88/100), which is considered excellent. Out of 2 contaminants tested, 1 exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has GRAND MOUND detected?
2 contaminants were tested in GRAND MOUND's water. Notable contaminants include Copper (90th percentile). 1 exceed EPA legal limits (MCLs). 1 exceed EPA health goals (MCLGs).
Does GRAND MOUND have any EPA violations?
Yes, GRAND MOUND has 4 EPA violation(s) on record, with the most recent in 2018. Violation types include MON, Other, MR.
How many people does GRAND MOUND serve?
GRAND MOUND serves approximately 3,764 people, Washington.
What type of water does GRAND MOUND provide?
GRAND MOUND sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WA5307158.
How does GRAND MOUND compare to other utilities in Washington?
GRAND MOUND scores 88/100 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.