The National Pipeline Mapping System (NPMS) Public Map Viewer is a web-based mapping application designed to assist the general public with displaying and querying data related to:
- gas transmission and hazardous liquid pipelines,
- liquefied natural gas (LNG) plants, and
- breakout tanks, and
- accidents and incidents
under Department of Transportation (DOT) Pipeline and Hazardous Materials Safety Administration (PHMSA) jurisdiction.
Please note that this application does not contain distribution or gas gathering pipelines.
Within the Public Map Viewer, the scale in which the user may zoom into NPMS
data is restricted in accordance with PHMSA’s NPMS Data Access Policy. For the
national view option, NPMS pipeline data will not display when zoomed in closer
than approximately a 1:20,000,000 scale, and LNG plant and breakout tank data
will not display when zoomed in closer than approximately a 1:3,000,000 scale.
For county and federal waters options, NPMS pipeline, LNG plant and breakout
tank data will not display when zoomed in closer than approximately a 1:24,000
scale. Information obtained and maps produced from the Public Map Viewer are
for general information only and may be re-distributed as needed. The
Public Map Viewer must not be used to identify exact locations of pipelines or
as a substitute for contacting the appropriate One Call system or pipeline
operator prior to excavation activities. The minimum accuracy of
geospatial data in the NPMS is +/-500 feet.
The NPMS Pipeline Attribute Data Dictionary describes
the pipeline attribute data available in the Public Map Viewer.
The Public Map Viewer contains an instructional video located under the Help menu which demonstrates the viewer’s functionality and should answer most of your questions about how to use the viewer. The instructional video is also accessible
at https://youtu.be/OnZFGVwae4I.
Contact information for pipeline operators may be queried via the Find Who’s Operating in Your Area tool.
This tool displays the contact information for all pipeline operators in the NPMS data for the user’s selected state,
county or ZIP code.
If you are a government official or a pipeline operator and are interested in obtaining NPMS data for use in your own GIS, you must
submit a Data Request. Please note that NPMS data is limited to the requestor’s area of jurisdiction or operation.
If you are a government official or a pipeline operator and wish to have greater flexibility in viewing pipeline data for
your jurisdiction or operation, please apply for an NPMS account and use PIMMA.
