C40/100
FRANKFORT — Water Quality Report 2026
Serving 24,000 people · Illinois
Water Source
Groundwater
County
—
System ID
IL1970400
Violations
30
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
strontium | 1839.30 µg/L | — | Above Goal |
Lead (90th percentile) | < 0.001 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
3
Violations (last 5yr)
3
Unresolved
0
Health-Related
TIER 3Unresolved
Surface water treatment technique failure
TIER 3Unresolved
Exceeded the MCL for disinfection byproducts
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: January 1, 2024 – December 31, 2024Rule: Revised Total Coliform RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 3Unresolved
Exceeded the MCL for disinfection byproducts
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: January 1, 2024 – December 31, 2024Rule: Revised Total Coliform RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
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 FRANKFORT
Is FRANKFORT water safe to drink?
FRANKFORT water receives a grade of C (40/100), which is considered fair. 0 contaminant(s) exceed EPA legal limits and 30 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has FRANKFORT detected?
66 contaminants were tested in FRANKFORT's water. Notable contaminants include Lead (90th percentile), strontium. No contaminants exceed EPA legal limits. 2 exceed EPA health goals (MCLGs).
Does FRANKFORT have any EPA violations?
Yes, FRANKFORT has 30 EPA violation(s) on record, with the most recent in 2025. Violation types include Other, MR, MCL. 6 are health-based violations.
How many people does FRANKFORT serve?
FRANKFORT serves approximately 24,000 people, Illinois. The system provides water to 1 community: Frankfort.
What type of water does FRANKFORT provide?
FRANKFORT sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is IL1970400.
How does FRANKFORT compare to other utilities in Illinois?
FRANKFORT scores 40/100 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.