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Stanley, WI Tap Water Quality 2026

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

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

Main Utility: Stanley Waterworks PWSID: WI6090462 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 2.00 ppb, 13% of the action level and no violations are open. No PFAS was detected.

A

Stanley earns an A for water quality

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

Lead: 2.00 ppb — 13% of the federal action level
PFAS tested, none detected
26 violations since 2015, 1 health-based
No violations currently open
Stanley's lead level vs. all Wisconsin community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 2.00 ppb — 13% of the federal action level
✓ Lower lead than 53% of Wisconsin utilities
Population Served
3598
~882 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
0
26 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
13% of EPA action level
2.00 ppb
Action level: 15 ppb
The 90th-percentile lead result is 2.00 ppb, 13% 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
Bromate MONITORING AND REPORTING — 0.010 mg/L 2025 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2025 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2017 Resolved
Endrin MONITORING AND REPORTING — 0.002 mg/L 2017 Resolved
BHC-GAMMA MONITORING AND REPORTING — 0.0002 mg/L 2017 Resolved
Methoxychlor MONITORING AND REPORTING — 0.04 mg/L 2017 Resolved
Toxaphene MONITORING AND REPORTING — 0.003 mg/L 2017 Resolved
Diquat MONITORING AND REPORTING — 0.02 mg/L 2017 Resolved
Glyphosate MONITORING AND REPORTING — 0.7 mg/L 2017 Resolved
OXAMYL MONITORING AND REPORTING — 0.2 mg/L 2017 Resolved
Simazine MONITORING AND REPORTING — 0.004 mg/L 2017 Resolved
Dinoseb MONITORING AND REPORTING — 0.007 mg/L 2017 Resolved
Hexachlorocyclopentadiene MONITORING AND REPORTING — 0.05 mg/L 2017 Resolved
Carbofuran MONITORING AND REPORTING — 0.04 mg/L 2017 Resolved
Atrazine MONITORING AND REPORTING — 0.003 mg/L 2017 Resolved
Heptachlor MONITORING AND REPORTING — 0.0004 mg/L 2017 Resolved
Heptachlor epoxide MONITORING AND REPORTING — 0.0002 mg/L 2017 Resolved
2,4-D MONITORING AND REPORTING — 0.07 mg/L 2017 Resolved
HEXACHLOROBENZENE MONITORING AND REPORTING — 0.001 mg/L 2017 Resolved
Pentachlorophenol MONITORING AND REPORTING — 0.001 mg/L 2017 Resolved
Endothall MONITORING AND REPORTING — 0.1 mg/L 2017 Resolved
2,4,5-TP MONITORING AND REPORTING — 0.05 mg/L 2017 Resolved
Dalapon MONITORING AND REPORTING — 0.2 mg/L 2017 Resolved
Picloram MONITORING AND REPORTING — 0.5 mg/L 2017 Resolved
LASSO MONITORING AND REPORTING — — 2017 Resolved
Chlordane MONITORING AND REPORTING — 0.002 mg/L 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

26 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 Stanley Waterworks
PWSID WI6090462
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served 3,598
Service connections 882
Systems serving this area 1
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Stanley tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 2.00 ppb, 13% of the action level.
Does Stanley water have PFAS? ▼
It was tested for the six regulated PFAS compounds and none were detected.
Who supplies water to Stanley? ▼
Stanley Waterworks (PWSID WI6090462). Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2025-03-13. No significant deficiencies were recorded.

What Should Stanley 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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