A80/100
Rock Island Water Dept City of — Water Quality Report 2026
Serving 3,226 people · Washington
Water Source
Groundwater
County
—
System ID
WA5373401
Violations
13
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
2
Violations (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2024 – February 26, 2025Enforcement: Resolving — corrective action underway
TIER 3Resolved
Exceeded the MCL for disinfection byproducts
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: January 1, 2022 – December 31, 2022Enforcement: Formal — state order issued
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 Rock Island Water Dept City of
Is Rock Island Water Dept City of water safe to drink?
Rock Island Water Dept City of water receives a grade of A (80/100), 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 Rock Island Water Dept City of detected?
1 contaminants were tested in Rock Island 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 Rock Island Water Dept City of have any EPA violations?
Yes, Rock Island Water Dept City of has 13 EPA violation(s) on record, with the most recent in 2024. Violation types include Other, MR, MCL. 1 are health-based violations.
How many people does Rock Island Water Dept City of serve?
Rock Island Water Dept City of serves approximately 3,226 people, Washington.
What type of water does Rock Island Water Dept City of provide?
Rock Island Water Dept City of sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WA5373401.
How does Rock Island Water Dept City of compare to other utilities in Washington?
Rock Island Water Dept City of scores 80/100 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.