A99/100
SOUTH BARRINGTON — Water Quality Report 2026
Serving 1,175 people · Illinois
Water Source
Groundwater
County
—
System ID
IL0310200
Violations
1
Contaminant Test Results
EPA Violation History
1
Violation (last 5yr)
1
Unresolved
0
Health-Related
TIER 3Unresolved
Surface water treatment technique failure
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 SOUTH BARRINGTON
Is SOUTH BARRINGTON water safe to drink?
SOUTH BARRINGTON water receives a grade of A (99/100), which is considered excellent. Out of 1 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has SOUTH BARRINGTON detected?
1 contaminants were tested in SOUTH BARRINGTON's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does SOUTH BARRINGTON have any EPA violations?
Yes, SOUTH BARRINGTON has 1 EPA violation(s) on record, with the most recent in 2025. Violation types include Other.
How many people does SOUTH BARRINGTON serve?
SOUTH BARRINGTON serves approximately 1,175 people, Illinois.
What type of water does SOUTH BARRINGTON provide?
SOUTH BARRINGTON sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is IL0310200.
How does SOUTH BARRINGTON compare to other utilities in Illinois?
SOUTH BARRINGTON scores 99/100 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.