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Linn, WI Tap Water Quality 2026

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

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

Main Utility: Lake Geneva Utility Commission PWSID: WI2650066 Updated: 2026 Q2
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PFAS above the federal limit at 1 of 2 sampling points

Lead is 8.00 ppb, 53% of the action level and no violations are open. However, PFAS exceeds the federal limit at 1 of 2 sampling points, running as high as 1.13 times the limit.

C

Linn earns a C for water quality

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

Lead: 8.00 ppb — 53% of the federal action level
PFAS above the federal limit at 1 of 2 sampling points
32 violations since 2015, 0 health-based
No violations currently open
Linn's lead level vs. all Wisconsin community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 8.00 ppb — 53% of the federal action level
✓ Lower lead than 9% of Wisconsin utilities
Population Served
53
~2632 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
0
32 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
53% of EPA action level
8.00 ppb
Action level: 15 ppb
The 90th-percentile lead result is 8.00 ppb, 53% 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
Total Haloacetic Acids (HAA5) MONITORING AND REPORTING — 0.060 mg/L 2022 Resolved
TTHM MONITORING AND REPORTING — 0.080 mg/L 2022 Resolved
Nitrate MONITORING AND REPORTING — 10 mg/L 2018 Resolved
trans-1,2-Dichloroethylene MONITORING AND REPORTING — 0.1 mg/L 2018 Resolved
1,1,1-Trichloroethane MONITORING AND REPORTING — 0.2 mg/L 2018 Resolved
1,2-Dichloroethane MONITORING AND REPORTING — 0.005 mg/L 2018 Resolved
DICHLOROMETHANE MONITORING AND REPORTING — 0.005 mg/L 2018 Resolved
Styrene MONITORING AND REPORTING — 0.1 mg/L 2018 Resolved
1,2,4-Trichlorobenzene MONITORING AND REPORTING — 0.07 mg/L 2018 Resolved
cis-1,2-Dichloroethylene MONITORING AND REPORTING — 0.07 mg/L 2018 Resolved
Xylenes, Total MONITORING AND REPORTING — 10 mg/L 2018 Resolved
o-Dichlorobenzene MONITORING AND REPORTING — 0.6 mg/L 2018 Resolved
p-Dichlorobenzene MONITORING AND REPORTING — 0.075 mg/L 2018 Resolved
Vinyl chloride MONITORING AND REPORTING — 0.002 mg/L 2018 Resolved
1,1-Dichloroethylene MONITORING AND REPORTING — 0.007 mg/L 2018 Resolved
CHLOROBENZENE MONITORING AND REPORTING — 0.1 mg/L 2018 Resolved
Carbon tetrachloride MONITORING AND REPORTING — 0.005 mg/L 2018 Resolved
1,2-Dichloropropane MONITORING AND REPORTING — 0.005 mg/L 2018 Resolved
Trichloroethylene MONITORING AND REPORTING — 0.005 mg/L 2018 Resolved
1,1,2-Trichloroethane MONITORING AND REPORTING — 0.005 mg/L 2018 Resolved
Tetrachloroethylene MONITORING AND REPORTING — 0.005 mg/L 2018 Resolved
Benzene MONITORING AND REPORTING — 0.005 mg/L 2018 Resolved
Toluene MONITORING AND REPORTING — 1 mg/L 2018 Resolved
Ethylbenzene MONITORING AND REPORTING — 0.7 mg/L 2018 Resolved
Nitrate MONITORING AND REPORTING — 10 mg/L 2018 Resolved
TTHM MONITORING AND REPORTING — 0.080 mg/L 2018 Resolved
Total Haloacetic Acids (HAA5) MONITORING AND REPORTING — 0.060 mg/L 2018 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2015 Resolved
Coliform (TCR) MONITORING AND REPORTING — 5% of samples 2015 Resolved
Public Notice OTHER — — 2015 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2015 Resolved
Coliform (TCR) MONITORING AND REPORTING — 5% of samples 2015 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

32 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 Lake Geneva Utility Commission
PWSID WI2650066
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served 53
Service connections 2,632
Systems serving this area 4
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Linn tap water safe to drink? ▼
It meets most federal standards, but PFAS exceeds the federal limit at 1 of 2 sampling points. No violations are currently open. Lead is 8.00 ppb, 53% of the action level.
Does Linn water have PFAS? ▼
Yes. PFAS exceeds the federal limit at 1 of 2 sampling points, running as high as 1.13 times the limit. Limits are enforced on a running annual average at each sampling point, not on a single sample.
Who supplies water to Linn? ▼
Lake Geneva Utility Commission (PWSID WI2650066), one of 4 systems serving this area. Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2025-05-28. No significant deficiencies were recorded.

What Should Linn Residents Do?

1
Consider a reverse-osmosis filter
Reverse osmosis removes more than 95% of PFAS. Standard carbon pitchers do not.
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.

Nearby Cities in Wisconsin

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