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Johnson Creek, WI Tap Water Quality 2026

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

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

Main Utility: Johnson Creek Waterworks PWSID: WI1280107 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 2.80 ppb, 19% of the action level and no violations are open. PFAS has never been sampled at this system.

C

Johnson Creek earns a C for water quality

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

Lead: 2.80 ppb — 19% of the federal action level
PFAS never sampled at this system
22 violations since 2015, 1 health-based
No violations currently open
Johnson Creek's lead level vs. all Wisconsin community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 2.80 ppb — 19% of the federal action level
✓ Lower lead than 40% of Wisconsin utilities
Population Served
3313
~1228 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
0
22 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
19% of EPA action level
2.80 ppb
Action level: 15 ppb
The 90th-percentile lead result is 2.80 ppb, 19% 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
Public Notice OTHER — — 2024 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2024 Resolved
LEAD AND COPPER RULE REVISIONS TREATMENT TECHNIQUE — — 2024 Resolved
Public Notice OTHER — — 2024 Unaddressed
Consumer Confidence Rule OTHER — — 2024 Resolved
Consumer Confidence Rule OTHER — — 2024 Resolved
Combined Uranium MONITORING AND REPORTING — 30 ug/L 2022 Resolved
Combined Uranium MONITORING AND REPORTING — 30 ug/L 2022 Resolved
Combined Uranium MONITORING AND REPORTING — 30 ug/L 2022 Resolved
Consumer Confidence Rule OTHER — — 2021 Resolved
Consumer Confidence Rule OTHER — — 2021 Resolved
Public Notice OTHER — — 2020 Resolved
Public Notice OTHER — — 2020 Resolved
Public Notice OTHER — — 2020 Resolved
Public Notice OTHER — — 2020 Resolved
Consumer Confidence Rule OTHER — — 2020 Resolved
Consumer Confidence Rule OTHER — — 2020 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2020 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2020 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2020 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2020 Resolved
Consumer Confidence Rule OTHER — — 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

22 violations are on record since 2015, of which 1 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Johnson Creek Waterworks
PWSID WI1280107
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served 3,313
Service connections 1,228
Systems serving this area 1
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Johnson Creek tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 2.80 ppb, 19% of the action level.
Does Johnson Creek 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 Johnson Creek? ▼
Johnson Creek Waterworks (PWSID WI1280107). Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2025-06-24. Inspectors recorded 3 significant deficiencies.

What Should Johnson Creek 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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