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Gratiot, WI Tap Water Quality 2026

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

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

Main Utility: Wiota Sanitary District PWSID: WI1330078 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 0.51 ppb, 3% of the action level and no violations are open. PFAS has never been sampled at this system.

B

Gratiot earns a B for water quality

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

Lead: 0.51 ppb — 3% of the federal action level
PFAS never sampled at this system
27 violations since 2015, 1 health-based
No violations currently open
Gratiot's lead level vs. all Wisconsin community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 0.51 ppb — 3% of the federal action level
✓ Lower lead than 93% of Wisconsin utilities
Population Served
7
~36 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
0
27 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
3% of EPA action level
0.51 ppb
Action level: 15 ppb
The 90th-percentile lead result is 0.51 ppb, 3% 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
cis-1,2-Dichloroethylene MONITORING AND REPORTING — 0.07 mg/L 2026 Archived
Xylenes, Total MONITORING AND REPORTING — 10 mg/L 2026 Archived
DICHLOROMETHANE MONITORING AND REPORTING — 0.005 mg/L 2026 Archived
o-Dichlorobenzene MONITORING AND REPORTING — 0.6 mg/L 2026 Archived
p-Dichlorobenzene MONITORING AND REPORTING — 0.075 mg/L 2026 Archived
Vinyl chloride MONITORING AND REPORTING — 0.002 mg/L 2026 Archived
1,1-Dichloroethylene MONITORING AND REPORTING — 0.007 mg/L 2026 Archived
1,2-Dichloroethane MONITORING AND REPORTING — 0.005 mg/L 2026 Archived
1,1,1-Trichloroethane MONITORING AND REPORTING — 0.2 mg/L 2026 Archived
Carbon tetrachloride MONITORING AND REPORTING — 0.005 mg/L 2026 Archived
1,2-Dichloropropane MONITORING AND REPORTING — 0.005 mg/L 2026 Archived
Trichloroethylene MONITORING AND REPORTING — 0.005 mg/L 2026 Archived
1,1,2-Trichloroethane MONITORING AND REPORTING — 0.005 mg/L 2026 Archived
Tetrachloroethylene MONITORING AND REPORTING — 0.005 mg/L 2026 Archived
CHLOROBENZENE MONITORING AND REPORTING — 0.1 mg/L 2026 Archived
Benzene MONITORING AND REPORTING — 0.005 mg/L 2026 Archived
Toluene MONITORING AND REPORTING — 1 mg/L 2026 Archived
Ethylbenzene MONITORING AND REPORTING — 0.7 mg/L 2026 Archived
Styrene MONITORING AND REPORTING — 0.1 mg/L 2026 Archived
trans-1,2-Dichloroethylene MONITORING AND REPORTING — 0.1 mg/L 2026 Archived
1,2,4-Trichlorobenzene MONITORING AND REPORTING — 0.07 mg/L 2026 Archived
Combined Uranium MONITORING AND REPORTING — 30 ug/L 2026 Archived
Combined Radium (-226 and -228) MONITORING AND REPORTING — 5 pCi/L 2026 Archived
Radium-226 MONITORING AND REPORTING — — 2026 Archived
Radium-228 MONITORING AND REPORTING — — 2026 Archived
Gross Alpha, Excl. Radon and U MONITORING AND REPORTING — 15 pCi/L 2026 Archived
Arsenic MCL EXCEEDANCE 0.01275 MG/L 0.010 mg/L 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

27 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 Wiota Sanitary District
PWSID WI1330078
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served 7
Service connections 36
Systems serving this area 2
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Gratiot tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 0.51 ppb, 3% of the action level.
Does Gratiot 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 Gratiot? ▼
Wiota Sanitary District (PWSID WI1330078), one of 2 systems serving this area. Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2026-01-05. Inspectors recorded 1 significant deficiency.

What Should Gratiot 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.

Nearby Cities in Wisconsin

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