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Madison, IN Tap Water Quality 2026

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

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

Main Utility: Madison Water Department PWSID: IN5239006 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 1.80 ppb, 12% of the action level and no violations are open. PFAS was detected below the federal limit.

A

Madison earns an A for water quality

Graded on violations, lead, and PFAS, with state inspection findings.

Lead: 1.80 ppb — 12% of the federal action level
PFAS detected below the federal limit
6 violations since 2015, 0 health-based
No violations currently open
Madison's lead level vs. all Indiana community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 1.80 ppb — 12% of the federal action level
✓ Lower lead than 71% of Indiana utilities
Population Served
11381
~6129 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
0
6 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
12% of EPA action level
1.80 ppb
Action level: 15 ppb
The 90th-percentile lead result is 1.80 ppb, 12% 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.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
Revised Total Coliform Rule MONITORING FAILURE — — 2025 Resolved
Consumer Confidence Rule OTHER — — 2025 Resolved
Consumer Confidence Rule OTHER — — 2024 Resolved
E. COLI MONITORING AND REPORTING — 0 2023 Resolved
Revised Total Coliform Rule OTHER — — 2023 Resolved
Revised Total Coliform Rule REPORTING FAILURE — — 2017 Resolved
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

6 violations are on record since 2015, of which 0 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Madison Water Department
PWSID IN5239006
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served 11,381
Service connections 6,129
Systems serving this area 2
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Madison tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 1.80 ppb, 12% of the action level.
Does Madison water have PFAS? ▼
PFAS was detected but stayed below the federal limit.
Who supplies water to Madison? ▼
Madison Water Department (PWSID IN5239006), one of 2 systems serving this area. Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2026-01-07. No significant deficiencies were recorded.

What Should Madison Residents Do?

1
Read your annual water report
Your supplier publishes a Consumer Confidence Report each July covering the prior year.
2
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.
3
Flush before drinking
If water has sat in pipes more than six hours, run the cold tap for two minutes before drinking or cooking.

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