National Pipeline Mapping System

OPS and its State Partners inspect about 2.6 million miles of hazardous liquid and natural gas pipelines transporting the products from their origins to customers throughout the U.S. The map shown here is part of a secure mapping system. You can learn about the National Pipeline Mapping System and pipelines in your county by clicking on the following links:

>> Find Pipelines in Your Area

>> Find Pipeline Operators in Your Area

Community Toolbox

PHMSA's mission is to protect people and the environment from the risks inherent in pipline transportation of energy products. Our mission cannot be accomplished in isolation. We are committed to working with all stakeholders to improve pipeline safety.

Find out how you can impact pipeline safety.

Leak Recognition & What to do?

Learn How to Recognize Where a Pipeline Is, How to Recognize a Pipeline Release, and What to DO in the event of a suspected or detected leak. Click here to learn more.

Pipeline 101

What are pipelines? Where are they? And why do we need them in the first place? Those are good, basic questions. Click here to read about Pipeline 101.

Safety Inspections

OPS and its State Partners conduct safety inspections of pipelines transporting natural gas from gathering fields (where natural gas is harvested from the earth) to homes and businesses. The blue line in this picture shows the portion of the nation’s natural gas system that the Federal regulators typically inspect. Learn more about the OPS inspection program.

Cast and Wrought Iron Pipelines

Up-to-date information detailing pipeline operators’ efforts to replace aging cast or wrought iron gas distribution pipelines, including the amount cast or wrought pipe in use per state or pipeline operator.

Pipeline Safety Update

The Pipeline Safety Update provides the actions taken by USDOT, the states, communities and pipeline operators.

Get West Virginia Updates

PHMSA Posts Record Enforcement Numbers in 2012

Pipeline Materials

Hazardous liquid and natural gas pipelines are constructed out of a variety of materials. Cross country pipelines, which typically operate with higher pressures, are manufactured from steel plates in short 40-ft sections, called “joints”. Welders connect the joints end to end to create long lengths of pipeline. Steel pipelines come in a variety of longitudinal seams, including a spiral weld or straight, and some have no seam at all (seamless pipe).