F0/100
LOCKPORT — Water Quality Report 2026
Serving 23,100 people · Illinois
Water Source
Groundwater
County
—
System ID
IL1970500
Violations
34
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.033 mg/L | 0.015 mg/L | Over Limit |
EPA Violation History
1
Violation (last 5yr)
1
Unresolved
0
Health-Related
TIER 3Unresolved
Reporting Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 2, 2025Rule: Ground Water 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 LOCKPORT
Is LOCKPORT water safe to drink?
LOCKPORT water receives a grade of F (0/100), which is considered failing. 1 contaminant(s) exceed EPA legal limits and 34 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has LOCKPORT detected?
66 contaminants were tested in LOCKPORT's water. Notable contaminants include Lead (90th percentile). 1 exceed EPA legal limits (MCLs). 1 exceed EPA health goals (MCLGs).
Does LOCKPORT have any EPA violations?
Yes, LOCKPORT has 34 EPA violation(s) on record, with the most recent in 2025. Violation types include RPT, MCL, MR. 17 are health-based violations.
How many people does LOCKPORT serve?
LOCKPORT serves approximately 23,100 people, Illinois. The system provides water to 1 community: Lockport.
What type of water does LOCKPORT provide?
LOCKPORT sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is IL1970500.
How does LOCKPORT compare to other utilities in Illinois?
LOCKPORT scores 0/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our Illinois state page for a full comparison of water systems.