Lac du Flambeau, WI Tap Water Quality 2026

Water quality report for Lac du Flambeau, WI — PFAS, lead and copper results, violation history and state inspection findings from EPA SDWIS.

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

Main Utility: Lac Du Flambeau PWSID: 055295401 Updated: 2026 Q2

✅

No federal limits exceeded on record

Lead is 0.69 ppb, 5% of the action level and no violations are open. PFAS was sampled but not enough times for a compliance determination.

Lac du Flambeau earns a B for water quality

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

Lead: 0.69 ppb — 5% of the federal action level

PFAS sampled, too few results to judge

2 violations since 2015, 0 health-based

No violations currently open

Lac du Flambeau's lead level vs. all Wisconsin community water systems

0 ppb5 ppb10 ppb15 ppb

Lead level: 0.69 ppb — 5% of the federal action level

✓ Lower lead than 88% of Wisconsin utilities

Population Served

1079

~624 connections

Water Source

Groundwater

Drawn from wells — SDWIS source code GW

Active Violations

2 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)

90th percentile of tap samples collected across the distribution system

5% of EPA action level

0.69 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.

123.1% of EPA action level

1,600 ppb

Action level: 1,300 ppb

The 90th-percentile lead result is 0.69 ppb, 5% 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
Revised Total Coliform Rule	REPORTING FAILURE	—	—	2023	Resolved
Thallium, Total	MONITORING AND REPORTING	—	0.002 mg/L	2017–2019	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

2 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 Lac Du Flambeau

PWSID 055295401

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

Population served 1,079

Service connections 624

Systems serving this area 1

Regulator US EPA (tribal primacy)

Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Lac du Flambeau tap water safe to drink? ▼

No federal limit is exceeded on record. No violations are currently open. Lead is 0.69 ppb, 5% of the action level.

Does Lac du Flambeau water have PFAS? ▼

It was sampled, but no sampling point had enough results for a compliance determination.

Who supplies water to Lac du Flambeau? ▼

Lac Du Flambeau (PWSID 055295401). Groundwater. Drawn from wells — SDWIS source code GW

When was this system last inspected? ▼

It was last inspected on 2025-09-17. No significant deficiencies were recorded.

What Should Lac du Flambeau Residents Do?

Read your annual water report

Your supplier publishes a Consumer Confidence Report each July covering the prior year.

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.

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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