States ›Montana ›Wibaux County ›Wibaux

Wibaux, MT Tap Water Quality 2026

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

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

Main Utility: Wibaux Town Of PWSID: MT0000361 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead was not detected and no violations are open. PFAS has never been sampled at this system.

B

Wibaux earns a B for water quality

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

Lead: not detected
PFAS never sampled at this system
121 violations since 2015, 3 health-based
No violations currently open
Wibaux's lead level vs. all Montana community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: Not detected — 0% of the federal action level
✓ Lower lead than % of Montana utilities
Population Served
442
~283 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
0
121 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
0% of EPA action level
Not detected
Action level: 15 ppb
Lead was not detected at the 90th percentile — the result fell below the laboratory detection limit. That is not the same as an absence of lead in every tap, and older homes with lead service lines can still show higher readings.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
E. COLI MONITORING AND REPORTING — 0 2026 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2025 Unaddressed
Revised Total Coliform Rule MONITORING FAILURE — — 2025 Resolved
E. COLI MONITORING AND REPORTING — 0 2025 Resolved
Nitrate-Nitrite MONITORING AND REPORTING — — 2025 Resolved
E. COLI MONITORING AND REPORTING — 0 2024 Resolved
E. COLI MONITORING AND REPORTING — 0 2024 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2024 Unaddressed
Revised Total Coliform Rule MONITORING FAILURE — — 2024 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2023 Resolved
Consumer Confidence Rule OTHER — — 2023 Resolved
Consumer Confidence Rule OTHER — — 2023 Resolved
E. COLI MONITORING AND REPORTING — 0 2023 Resolved
Nitrate-Nitrite MONITORING AND REPORTING — — 2023 Resolved
Endrin MONITORING AND REPORTING — 0.002 mg/L 2023–2025 Archived
BHC-GAMMA MONITORING AND REPORTING — 0.0002 mg/L 2023–2025 Archived
Methoxychlor MONITORING AND REPORTING — 0.04 mg/L 2023–2025 Archived
Toxaphene MONITORING AND REPORTING — 0.003 mg/L 2023–2025 Archived
Dalapon MONITORING AND REPORTING — 0.2 mg/L 2023–2025 Archived
Di(2-ethylhexyl) adipate MONITORING AND REPORTING — 0.4 mg/L 2023–2025 Archived
OXAMYL MONITORING AND REPORTING — 0.2 mg/L 2023–2025 Archived
Simazine MONITORING AND REPORTING — 0.004 mg/L 2023–2025 Archived
Di(2-ethylhexyl) phthalate MONITORING AND REPORTING — 0.006 mg/L 2023–2025 Archived
Picloram MONITORING AND REPORTING — 0.5 mg/L 2023–2025 Archived
Dinoseb MONITORING AND REPORTING — 0.007 mg/L 2023–2025 Archived
Hexachlorocyclopentadiene MONITORING AND REPORTING — 0.05 mg/L 2023–2025 Archived
Carbofuran MONITORING AND REPORTING — 0.04 mg/L 2023–2025 Archived
Atrazine MONITORING AND REPORTING — 0.003 mg/L 2023–2025 Archived
LASSO MONITORING AND REPORTING — — 2023–2025 Archived
Heptachlor MONITORING AND REPORTING — 0.0004 mg/L 2023–2025 Archived
Heptachlor epoxide MONITORING AND REPORTING — 0.0002 mg/L 2023–2025 Archived
2,4-D MONITORING AND REPORTING — 0.07 mg/L 2023–2025 Archived
2,4,5-TP MONITORING AND REPORTING — 0.05 mg/L 2023–2025 Archived
HEXACHLOROBENZENE MONITORING AND REPORTING — 0.001 mg/L 2023–2025 Archived
Benzo(a)pyrene MONITORING AND REPORTING — 0.0002 mg/L 2023–2025 Archived
Pentachlorophenol MONITORING AND REPORTING — 0.001 mg/L 2023–2025 Archived
Chlordane MONITORING AND REPORTING — 0.002 mg/L 2023–2025 Archived
Endrin MONITORING AND REPORTING — 0.002 mg/L 2023–2025 Archived
BHC-GAMMA MONITORING AND REPORTING — 0.0002 mg/L 2023–2025 Archived
Methoxychlor MONITORING AND REPORTING — 0.04 mg/L 2023–2025 Archived
Toxaphene MONITORING AND REPORTING — 0.003 mg/L 2023–2025 Archived
Dalapon MONITORING AND REPORTING — 0.2 mg/L 2023–2025 Archived
Di(2-ethylhexyl) adipate MONITORING AND REPORTING — 0.4 mg/L 2023–2025 Archived
OXAMYL MONITORING AND REPORTING — 0.2 mg/L 2023–2025 Archived
Simazine MONITORING AND REPORTING — 0.004 mg/L 2023–2025 Archived
Di(2-ethylhexyl) phthalate MONITORING AND REPORTING — 0.006 mg/L 2023–2025 Archived
Picloram MONITORING AND REPORTING — 0.5 mg/L 2023–2025 Archived
Dinoseb MONITORING AND REPORTING — 0.007 mg/L 2023–2025 Archived
Hexachlorocyclopentadiene MONITORING AND REPORTING — 0.05 mg/L 2023–2025 Archived
Carbofuran MONITORING AND REPORTING — 0.04 mg/L 2023–2025 Archived
Atrazine MONITORING AND REPORTING — 0.003 mg/L 2023–2025 Archived
LASSO MONITORING AND REPORTING — — 2023–2025 Archived
Heptachlor MONITORING AND REPORTING — 0.0004 mg/L 2023–2025 Archived
Heptachlor epoxide MONITORING AND REPORTING — 0.0002 mg/L 2023–2025 Archived
2,4-D MONITORING AND REPORTING — 0.07 mg/L 2023–2025 Archived
2,4,5-TP MONITORING AND REPORTING — 0.05 mg/L 2023–2025 Archived
HEXACHLOROBENZENE MONITORING AND REPORTING — 0.001 mg/L 2023–2025 Archived
Benzo(a)pyrene MONITORING AND REPORTING — 0.0002 mg/L 2023–2025 Archived
Pentachlorophenol MONITORING AND REPORTING — 0.001 mg/L 2023–2025 Archived
Chlordane MONITORING AND REPORTING — 0.002 mg/L 2023–2025 Archived
Arsenic MONITORING AND REPORTING — 0.010 mg/L 2023–2025 Archived
Arsenic MONITORING AND REPORTING — 0.010 mg/L 2023–2025 Archived
1,2,4-Trichlorobenzene MONITORING AND REPORTING — 0.07 mg/L 2023–2025 Archived
cis-1,2-Dichloroethylene MONITORING AND REPORTING — 0.07 mg/L 2023–2025 Archived
Xylenes, Total MONITORING AND REPORTING — 10 mg/L 2023–2025 Archived
DICHLOROMETHANE MONITORING AND REPORTING — 0.005 mg/L 2023–2025 Archived
o-Dichlorobenzene MONITORING AND REPORTING — 0.6 mg/L 2023–2025 Archived
p-Dichlorobenzene MONITORING AND REPORTING — 0.075 mg/L 2023–2025 Archived
Vinyl chloride MONITORING AND REPORTING — 0.002 mg/L 2023–2025 Archived
1,1-Dichloroethylene MONITORING AND REPORTING — 0.007 mg/L 2023–2025 Archived
trans-1,2-Dichloroethylene MONITORING AND REPORTING — 0.1 mg/L 2023–2025 Archived
1,2-Dichloroethane MONITORING AND REPORTING — 0.005 mg/L 2023–2025 Archived
1,1,1-Trichloroethane MONITORING AND REPORTING — 0.2 mg/L 2023–2025 Archived
Carbon tetrachloride MONITORING AND REPORTING — 0.005 mg/L 2023–2025 Archived
1,2-Dichloropropane MONITORING AND REPORTING — 0.005 mg/L 2023–2025 Archived
Trichloroethylene MONITORING AND REPORTING — 0.005 mg/L 2023–2025 Archived
1,1,2-Trichloroethane MONITORING AND REPORTING — 0.005 mg/L 2023–2025 Archived
Tetrachloroethylene MONITORING AND REPORTING — 0.005 mg/L 2023–2025 Archived
CHLOROBENZENE MONITORING AND REPORTING — 0.1 mg/L 2023–2025 Archived
Benzene MONITORING AND REPORTING — 0.005 mg/L 2023–2025 Archived
Toluene MONITORING AND REPORTING — 1 mg/L 2023–2025 Archived
Ethylbenzene MONITORING AND REPORTING — 0.7 mg/L 2023–2025 Archived
Styrene MONITORING AND REPORTING — 0.1 mg/L 2023–2025 Archived
1,2,4-Trichlorobenzene MONITORING AND REPORTING — 0.07 mg/L 2023–2025 Archived
cis-1,2-Dichloroethylene MONITORING AND REPORTING — 0.07 mg/L 2023–2025 Archived
Xylenes, Total MONITORING AND REPORTING — 10 mg/L 2023–2025 Archived
DICHLOROMETHANE MONITORING AND REPORTING — 0.005 mg/L 2023–2025 Archived
o-Dichlorobenzene MONITORING AND REPORTING — 0.6 mg/L 2023–2025 Archived
p-Dichlorobenzene MONITORING AND REPORTING — 0.075 mg/L 2023–2025 Archived
Vinyl chloride MONITORING AND REPORTING — 0.002 mg/L 2023–2025 Archived
1,1-Dichloroethylene MONITORING AND REPORTING — 0.007 mg/L 2023–2025 Archived
trans-1,2-Dichloroethylene MONITORING AND REPORTING — 0.1 mg/L 2023–2025 Archived
1,2-Dichloroethane MONITORING AND REPORTING — 0.005 mg/L 2023–2025 Archived
1,1,1-Trichloroethane MONITORING AND REPORTING — 0.2 mg/L 2023–2025 Archived
Carbon tetrachloride MONITORING AND REPORTING — 0.005 mg/L 2023–2025 Archived
1,2-Dichloropropane MONITORING AND REPORTING — 0.005 mg/L 2023–2025 Archived
Trichloroethylene MONITORING AND REPORTING — 0.005 mg/L 2023–2025 Archived
1,1,2-Trichloroethane MONITORING AND REPORTING — 0.005 mg/L 2023–2025 Archived
Tetrachloroethylene MONITORING AND REPORTING — 0.005 mg/L 2023–2025 Archived
CHLOROBENZENE MONITORING AND REPORTING — 0.1 mg/L 2023–2025 Archived
Benzene MONITORING AND REPORTING — 0.005 mg/L 2023–2025 Archived
Toluene MONITORING AND REPORTING — 1 mg/L 2023–2025 Archived
Ethylbenzene MONITORING AND REPORTING — 0.7 mg/L 2023–2025 Archived
Styrene MONITORING AND REPORTING — 0.1 mg/L 2023–2025 Archived
Revised Total Coliform Rule TREATMENT TECHNIQUE — — 2022 Resolved
E. COLI MONITORING AND REPORTING — 0 2022 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2021 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2021 Resolved
E. COLI MONITORING AND REPORTING — 0 2019 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2019 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2017 Resolved
Consumer Confidence Rule OTHER — — 2017 Resolved
Nitrate-Nitrite MONITORING AND REPORTING — — 2017 Resolved
E. COLI MONITORING AND REPORTING — 0 2016 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2016 Resolved
Coliform (TCR) MCL EXCEEDANCE — 5% of samples 2016 Resolved
Coliform (TCR) MCL EXCEEDANCE — 5% of samples 2015 Resolved
Coliform (TCR) MONITORING AND REPORTING — 5% of samples 2015 Resolved
Coliform (TCR) MONITORING AND REPORTING — 5% of samples 2015 Resolved
E. COLI MONITORING AND REPORTING — 0 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

121 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 Wibaux Town Of
PWSID MT0000361
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served 442
Service connections 283
Systems serving this area 1
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Wibaux tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open.
Does Wibaux 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 Wibaux? ▼
Wibaux Town Of (PWSID MT0000361). Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2025-01-15. No significant deficiencies were recorded.

What Should Wibaux 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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