A home

Pipeline Locations

Emergency Info

Suspect a natural gas leak?
Call 911
And Southwest Gas immediately at
whether you're our customer or not.

Si usted sospecha una
fuga de gas natural,
llame al 911
Y a Southwest gas al
Inmediato, si usted es nuestro
cliente o no.

A natural gas pipeline marker on the side of a highway.

Underground pipelines can be located anywhere, including under public roads, railroads, street intersections, open fields, and on private property.

For your protection, line markers are used to indicate the pipeline’s approximate location. Here's what to look for to identify natural gas pipelines.

Pipeline markers:

  • Are yellow
  • Are typically seen where a pipeline intersects a street, highway or railway
  • Are NOT required for all pipeline facilities
  • Do not indicate the pipeline’s depth or exact location
  • List emergency telephone numbers in case of a natural gas emergency

Make sure markers are left undisturbed to help remind everyone that natural gas lines are in the area.


The Southwest Gas service territory map provides general locations of our transmission pipelines. Lower pressure distribution mains and service lines connected to the gas meters at homes and businesses are not shown.

To locate natural gas transmission lines operated by Southwest Gas and other companies, visit the U.S. Department of Transportation’s Pipeline and Hazardous Materials Safety Administration National Pipeline Mapping System (NPMS) website.