B73/100
MASCOUTAH — Water Quality Report 2026
Serving 8,759 people · Illinois
Water Source
Purchased Surface Water
County
—
System ID
IL1630800
Violations
8
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.005 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
1
Unresolved
0
Health-Related
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 MASCOUTAH
Is MASCOUTAH water safe to drink?
MASCOUTAH water receives a grade of B (73/100), which is considered good. Out of 51 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has MASCOUTAH detected?
51 contaminants were tested in MASCOUTAH's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does MASCOUTAH have any EPA violations?
Yes, MASCOUTAH has 8 EPA violation(s) on record, with the most recent in 2025. Violation types include Other, TT, MCL. 4 are health-based violations.
How many people does MASCOUTAH serve?
MASCOUTAH serves approximately 8,759 people, Illinois. The system provides water to 1 community: Mascoutah.
What type of water does MASCOUTAH provide?
MASCOUTAH sources its water from purchased surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is IL1630800.
How does MASCOUTAH compare to other utilities in Illinois?
MASCOUTAH 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.