A86/100
MARSHALL — Water Quality Report 2026
Serving 3,947 people · Illinois
Water Source
Groundwater
County
—
System ID
IL0230100
Violations
14
Contaminant Test Results
EPA Violation History
3
Violations (last 5yr)
1
Unresolved
0
Health-Related
TIER 3Unresolved
Surface water treatment technique failure
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2023 – June 7, 2024Enforcement: Resolving — corrective action underway
TIER 3Resolved
Monitoring / Reporting Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: January 1, 2022 – January 26, 2022Rule: Ground Water RuleEnforcement: 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 MARSHALL
Is MARSHALL water safe to drink?
MARSHALL water receives a grade of A (86/100), which is considered excellent. Out of 31 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has MARSHALL detected?
31 contaminants were tested in MARSHALL's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does MARSHALL have any EPA violations?
Yes, MARSHALL has 14 EPA violation(s) on record, with the most recent in 2025. Violation types include Other, MR.
How many people does MARSHALL serve?
MARSHALL serves approximately 3,947 people, Illinois. The system provides water to 1 community: Marshall.
What type of water does MARSHALL provide?
MARSHALL sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is IL0230100.
How does MARSHALL compare to other utilities in Illinois?
MARSHALL scores 86/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our Illinois state page for a full comparison of water systems.