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Pipeline Safety Data

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Overview

As of the beginning of 2026, the Wisconsin Pipeline Safety Program regulates:

  • 79,598 miles of natural gas distribution pipelines
  • 914 miles of natural gas transmission pipelines
  • 4 miles of natural gas gathering pipelines

Annual Reports

Damage Prevention

Wisconsin natural gas operators submit damages to their facilities t​o Pipeline and Hazardous Materials Safety Administration (PHMSA) annually. These can be viewed on PHMSA's page for Wisconsin Damage Prevention Information. Operators submit additional data about their facilities which can be viewed on PHMSA's Gas Distribution Annual Report.

Distribution Pipelines

The spreadsheet below contains data of all natural gas mains and services in Wisconsin. Each tab shows the combined sum of all Wisconsin gas operators at the end of the specified year.

Inspections, Investigations, ​and Enforcement

Pipeline Safety

Wisconsin Pipeline Safety inspection, investigation, and enforcement dockets:

One-Call Law

Wisconsin One-Call Law enforcement action history:

Incidents

An incident is defined in 49 CFR §191.3 as a release of natural gas from an operator's system resulting in a death, a serious injury, significant property damage, significant gas loss, or a significant emergency event.

Jurisdictional Incidents per Year
​2021 ​2022 ​2023 ​2024 ​2025
​1 0​ ​0 1​ ​1
Incident Investigations

Starting in 2021, Wisconsin incident investigation data can be found in this spreadsheet:

It includes investigations on possible incidents even if they ended up not meeting the definition of an incident.

Incident data from 1986-2021 can be found in this spreadsheet:

Non-jurisdictional and Jurisdictional Incidents in Wisconsin

PHMSA also collects and shares incident data on their Pipeline Incident Trends page. Click desired trend link and filter state to Wisconsin to view those incidents.

Maps

Natural Gas Utilities Service Areas

Wisconsin natural gas utilities service areas can be viewed on an Interactive Map.

Transmission Pipeline Map

The National Pipeline Mapping System Publi​c V​​​​iewer​ provides maps of natural gas an​d hazardous liquids transmission pipelines. Note: this does not include distribution mains or service lines.

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