A pipe with a valve on the top

Pipeline Location Information

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 streets and sidewalks, and on private property.

For your protection, line markers are used to indicate the approximate location of pipelines. Next time you're out, here's what to look for to identify natural gas pipeline markers:

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. Additionally, below-ground markers, such as yellow warning tape or mesh, may be present to warn excavators to the presence of pipe. If this below-ground marking tape is encountered, stop work immediately and call Southwest Gas.


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.

You can also visit the U.S. Department of Transportation’s Pipeline and Hazardous Materials Safety Administration National Pipeline Mapping System (NPMS) website to locate natural gas transmission lines operated by Southwest Gas and other companies in your area.