The NPMS Public Map Viewer enables the user to view National Pipeline Mapping System (NPMS)
data one county at a time. NPMS data consists of gas transmission pipelines and hazardous liquid
trunklines. It does not contain gathering or distribution pipelines, such as lines which deliver
gas to a customer's home. Therefore, not all pipelines in an area will be visible in the Public
Map Viewer. NPMS data is for reference purposes only. It should never be used as a substitute
for contacting a one-call center prior to excavation activities. Please call 811 before any digging
occurs.
To view the data, select a state and then a county from the drop-down lists below. To view another county,
close the Public Viewer window, return to the home page of the NPMS website and click the NPMS Public Map
Viewer button again. The user may zoom in to a map scale of 1:24,000. Data cannot be downloaded from the Public
Viewer.
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