F0/100
PLAINFIELD — Water Quality Report 2026
Serving 50,000 people · Illinois
Water Source
Purchased Surface Water
County
—
System ID
IL1970800
Violations
33
Contaminant Test Results
EPA Violation History
2
Violations (last 5yr)
1
Unresolved
0
Health-Related
TIER 3Unresolved
Surface water treatment technique failure
TIER 3Resolved
Monitoring / Reporting Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: January 13, 2022 – March 30, 2022Rule: 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 PLAINFIELD
Is PLAINFIELD water safe to drink?
PLAINFIELD water receives a grade of F (0/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 33 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has PLAINFIELD detected?
69 contaminants were tested in PLAINFIELD's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does PLAINFIELD have any EPA violations?
Yes, PLAINFIELD has 33 EPA violation(s) on record, with the most recent in 2025. Violation types include Other, MR, MCL. 19 are health-based violations.
How many people does PLAINFIELD serve?
PLAINFIELD serves approximately 50,000 people, Illinois. The system provides water to 1 community: Plainfield.
What type of water does PLAINFIELD provide?
PLAINFIELD 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 IL1970800.
How does PLAINFIELD compare to other utilities in Illinois?
PLAINFIELD 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.