C57/100
IL AMERICAN-TOLONO — Water Quality Report 2026
Serving 3,604 people · Illinois
Water Source
Purchased Groundwater
County
—
System ID
IL0191000
Violations
19
Contaminant Test Results
EPA Violation History
4
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: July 1, 2022 – September 30, 2022Rule: Stage 2 DBPREnforcement: 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: July 1, 2022 – September 30, 2022Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved
Failed to conduct Level 2 Assessment
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: December 30, 2021 – March 25, 2022Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved
Disinfection byproduct treatment technique failure
When: April 8, 2021 – August 31, 2021Rule: 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 IL AMERICAN-TOLONO
Is IL AMERICAN-TOLONO water safe to drink?
IL AMERICAN-TOLONO water receives a grade of C (57/100), which is considered fair. 0 contaminant(s) exceed EPA legal limits and 19 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has IL AMERICAN-TOLONO detected?
1 contaminants were tested in IL AMERICAN-TOLONO's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does IL AMERICAN-TOLONO have any EPA violations?
Yes, IL AMERICAN-TOLONO has 19 EPA violation(s) on record, with the most recent in 2022. Violation types include MR, Other, MCL. 6 are health-based violations.
How many people does IL AMERICAN-TOLONO serve?
IL AMERICAN-TOLONO serves approximately 3,604 people, Illinois. The system provides water to 1 community: Tolono.
What type of water does IL AMERICAN-TOLONO provide?
IL AMERICAN-TOLONO sources its water from purchased groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is IL0191000.
How does IL AMERICAN-TOLONO compare to other utilities in Illinois?
IL AMERICAN-TOLONO scores 57/100 with a grade of C (fair). This score indicates room for improvement compared to other utilities. Visit our Illinois state page for a full comparison of water systems.