Warrensburg, IL Tap Water Quality 2026

Water quality report for Warrensburg, IL — PFAS, lead and copper results, violation history and state inspection findings from EPA SDWIS.

A look at Warrensburg's drinking water using EPA enforcement records: violations, lead and copper results, PFAS sampling and state inspection findings.

Main Utility: Warrensburg PWSID: IL1150500 Updated: 2026 Q2

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1 violation currently open

Lead is 7.00 ppb, 47% of the action level. PFAS has never been sampled at this system.

Warrensburg earns a D for water quality

Graded on violations and lead, with state inspection findings. PFAS not tested.

Lead: 7.00 ppb — 47% of the federal action level

PFAS never sampled at this system

4 violations since 2015, 1 health-based

1 violation currently open

Warrensburg's lead level vs. all Illinois community water systems

0 ppb5 ppb10 ppb15 ppb

Lead level: 7.00 ppb — 47% of the federal action level

✓ Lower lead than 20% of Illinois utilities

Population Served

1101

~463 connections

Water Source

Groundwater

Drawn from wells — SDWIS source code GW

Active Violations

1 open of 4 since 2015

Lead & Copper Testing

Lead (Pb)

90th percentile of tap samples collected across the distribution system

47% of EPA action level

7.00 ppb

Action level: 15 ppb

Copper (Cu)

90th percentile of tap samples. SDWIS reports a copper figure only when a system exceeds the action level, so any value here is an exceedance.

146.2% of EPA action level

1,900 ppb

Action level: 1,300 ppb

The 90th-percentile lead result is 7.00 ppb, 47% of the 15 ppb federal action level. The action level is a treatment trigger, not a legal maximum, and it is measured across sampled taps rather than at any single home. Copper reached the action level here; a copper figure appears in SDWIS only when a system triggers it.

Contaminant Violations (2015–Present)

Contaminant	Type	Measured	Limit	Period	Status
Public Notice	OTHER	—	—	2025	Resolved
LEAD AND COPPER RULE REVISIONS	REPORTING FAILURE	—	—	2025	Unaddressed
Consumer Confidence Rule	OTHER	—	—	2025	Unaddressed
LEAD AND COPPER RULE REVISIONS	TREATMENT TECHNIQUE	—	—	2024	Unaddressed

Understanding violation types MCL violations mean a contaminant exceeded the federal maximum limit — the most serious type.
TT (Treatment Technique) violations mean required treatment procedures weren't followed, but don't necessarily mean contamination occurred.

Violation History

1 violation remains open, out of 4 recorded since 2015 (1 health-based).

About the Main Water System

Utility Warrensburg

PWSID IL1150500

Water source Groundwater — Drawn from wells — SDWIS source code GW

Population served 1,101

Service connections 463

Systems serving this area 1

Regulator State primacy agency

Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Warrensburg tap water safe to drink? ▼

No federal limit is exceeded on record. 1 violation(s) remain open. Lead is 7.00 ppb, 47% of the action level.

Does Warrensburg water have PFAS? ▼

This system has never been sampled for PFAS. EPA's national monitoring covered systems serving 3,300 people or more, so no results exist — which is not evidence that none is present.

Who supplies water to Warrensburg? ▼

Warrensburg (PWSID IL1150500). Groundwater. Drawn from wells — SDWIS source code GW

When was this system last inspected? ▼

It was last inspected on 2024-12-03. No significant deficiencies were recorded.

What Should Warrensburg Residents Do?

Consider a filter certified for lead

Look for NSF/ANSI 53 certification for lead reduction.

Check for a lead service line

Lead reaches tap water mainly through service lines and household plumbing. Suppliers now publish an inventory identifying lead lines.

Follow the open violation

This system has an unresolved violation. Contact the supplier for its corrective-action schedule.

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