B73/100
ROCK ISLAND ARSENAL, US ARMY — Water Quality Report 2026
Serving 7,800 people · Illinois
Water Source
Surface Water
County
—
System ID
IL1615387
Violations
11
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
PFOA | 0.005 µg/L | 0.004 µg/L | Over Limit |
EPA Violation History
3
Violations (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: April 1, 2025 – June 30, 2025Rule: Stage 2 DBPREnforcement: 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: April 1, 2025 – April 12, 2025Enforcement: Resolving — corrective action underway
TIER 3Resolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: April 1, 2025 – June 30, 2025Rule: Stage 2 DBPREnforcement: 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 ROCK ISLAND ARSENAL, US ARMY
Is ROCK ISLAND ARSENAL, US ARMY water safe to drink?
ROCK ISLAND ARSENAL, US ARMY water receives a grade of B (73/100), which is considered good. Out of 31 contaminants tested, 1 exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has ROCK ISLAND ARSENAL, US ARMY detected?
31 contaminants were tested in ROCK ISLAND ARSENAL, US ARMY's water. Notable contaminants include PFOA. 1 exceed EPA legal limits (MCLs). 1 exceed EPA health goals (MCLGs).
Does ROCK ISLAND ARSENAL, US ARMY have any EPA violations?
Yes, ROCK ISLAND ARSENAL, US ARMY has 11 EPA violation(s) on record, with the most recent in 2025. Violation types include MR, MCL, Other. 2 are health-based violations.
How many people does ROCK ISLAND ARSENAL, US ARMY serve?
ROCK ISLAND ARSENAL, US ARMY serves approximately 7,800 people, Illinois.
What type of water does ROCK ISLAND ARSENAL, US ARMY provide?
ROCK ISLAND ARSENAL, US ARMY sources its water from surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is IL1615387.
How does ROCK ISLAND ARSENAL, US ARMY compare to other utilities in Illinois?
ROCK ISLAND ARSENAL, US ARMY scores 73/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our Illinois state page for a full comparison of water systems.