Juneau, WI Tap Water Quality 2026

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

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

Main Utility: Juneau Waterworks PWSID: WI1140058 Updated: 2026 Q2

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1 violation currently open

Lead is 2.70 ppb, 18% of the action level. PFAS has never been sampled at this system.

Juneau earns a D for water quality

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

Lead: 2.70 ppb — 18% of the federal action level

PFAS never sampled at this system

10 violations since 2015, 7 health-based

1 violation currently open

Juneau's lead level vs. all Wisconsin community water systems

0 ppb5 ppb10 ppb15 ppb

Lead level: 2.70 ppb — 18% of the federal action level

✓ Lower lead than 41% of Wisconsin utilities

Population Served

2658

~972 connections

Water Source

Groundwater

Drawn from wells — SDWIS source code GW

Active Violations

1 open of 10 since 2015

Lead & Copper Testing

Lead (Pb)

90th percentile of tap samples collected across the distribution system

18% of EPA action level

2.70 ppb

Action level: 15 ppb

The 90th-percentile lead result is 2.70 ppb, 18% 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)

Contaminant	Type	Measured	Limit	Period	Status
Lead and Copper Rule	TREATMENT TECHNIQUE	—	TT	2025	Unaddressed
Lead and Copper Rule	TREATMENT TECHNIQUE	—	TT	2024	Resolved
Public Notice	OTHER	—	—	2024	Resolved
Lead and Copper Rule	TREATMENT TECHNIQUE	—	TT	2023	Resolved
Combined Radium (-226 and -228)	MCL EXCEEDANCE	5.58 PCI/L	5 pCi/L	2021	Resolved
Lead and Copper Rule	TREATMENT TECHNIQUE	—	TT	2020	Resolved
Combined Radium (-226 and -228)	MCL EXCEEDANCE	5.58 PCI/L	5 pCi/L	2020	Resolved
Public Notice	OTHER	—	—	2020	Resolved
Combined Radium (-226 and -228)	MCL EXCEEDANCE	5.575 PCI/L	5 pCi/L	2019	Resolved
Lead and Copper Rule	MONITORING AND REPORTING	—	TT	2018	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

1 violation remains open, out of 10 recorded since 2015 (7 health-based).

About the Main Water System

Utility Juneau Waterworks

PWSID WI1140058

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

Population served 2,658

Service connections 972

Systems serving this area 1

Regulator State primacy agency

Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Juneau tap water safe to drink? ▼

No federal limit is exceeded on record. 1 violation(s) remain open. Lead is 2.70 ppb, 18% of the action level.

Does Juneau 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 Juneau? ▼

Juneau Waterworks (PWSID WI1140058). Groundwater. Drawn from wells — SDWIS source code GW

When was this system last inspected? ▼

It was last inspected on 2025-03-18. No significant deficiencies were recorded.

What Should Juneau 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.

Follow the open violation

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

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