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Weston, WI Tap Water Quality 2026

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

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

Main Utility: Shady Oaks Mhp PWSID: WI6170445 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 0.66 ppb, 4% of the action level and no violations are open. PFAS has never been sampled at this system.

C

Weston earns a C for water quality

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

Lead: 0.66 ppb — 4% of the federal action level
PFAS never sampled at this system
25 violations since 2015, 3 health-based
No violations currently open
Weston's lead level vs. all Wisconsin community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 0.66 ppb — 4% of the federal action level
✓ Lower lead than 90% of Wisconsin utilities
Population Served
7
~23 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
0
25 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
4% of EPA action level
0.66 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.
138.5% of EPA action level
1,800 ppb
Action level: 1,300 ppb
The 90th-percentile lead result is 0.66 ppb, 4% 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)

ContaminantTypeMeasuredLimitPeriodStatus
LEAD AND COPPER RULE REVISIONS REPORTING FAILURE — — 2025 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2021 Resolved
Public Notice OTHER — — 2020 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2020 Addressed
Public Notice OTHER — — 2020 Resolved
Combined Uranium MONITORING AND REPORTING — 30 ug/L 2019 Archived
Consumer Confidence Rule OTHER — — 2019 Addressed
Consumer Confidence Rule OTHER — — 2019 Addressed
Public Notice OTHER — — 2019 Addressed
Radium-228 MONITORING AND REPORTING — — 2019 Archived
Radium-226 MONITORING AND REPORTING — — 2019 Archived
Combined Radium (-226 and -228) MONITORING AND REPORTING — 5 pCi/L 2019 Archived
Combined Uranium MONITORING AND REPORTING — 30 ug/L 2019 Archived
Gross Alpha, Excl. Radon and U MONITORING AND REPORTING — 15 pCi/L 2019 Archived
Groundwater Rule TREATMENT TECHNIQUE — — 2019 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2018 Archived
Groundwater Rule TREATMENT TECHNIQUE — — 2016 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2016 Resolved
Consumer Confidence Rule OTHER — — 2016 Addressed
Consumer Confidence Rule OTHER — — 2015 Addressed
Public Notice OTHER — — 2015 Resolved
Consumer Confidence Rule OTHER — — 2015 Addressed
Radium-228 MONITORING AND REPORTING — — 2015 Archived
Gross Alpha, Excl. Radon and U MONITORING AND REPORTING — 15 pCi/L 2015 Archived
Combined Radium (-226 and -228) MONITORING AND REPORTING — 5 pCi/L 2015 Archived
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

25 violations are on record since 2015, of which 3 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Shady Oaks Mhp
PWSID WI6170445
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served 7
Service connections 23
Systems serving this area 1
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Weston tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 0.66 ppb, 4% of the action level.
Does Weston 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 Weston? ▼
Shady Oaks Mhp (PWSID WI6170445). Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2023-08-23. No significant deficiencies were recorded.

What Should Weston 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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