PHMSA National Pipeline Mapping System Walk Through
PHMSA maintains an online mapping system where you can find out where pipelines are in your community. Unfortunately, it can be sometimes difficult to use, so here is our tutorial on how to use the National Pipeline Mapping System.
Down at the bottom, it asks you to pick a state. For this example, we picked “Washington State”. It will then load up an option for which county.
I picked Thurston County. It will load up the pipeline map.
The Red and Blue lines represent Gas Transmission and Hazardous Liquid Pipelines.
Now, you can also find pipelines by your address. Go to the toolbar and click the “View Pipelines By”
Drag down to “Street Address” and enter the address you wish to find
Make sure you spell out the State, you cannot use the mail abbreviations. It will take you straight to your address.
Next, if you want specific information about a Pipeline, go back to the tool bar and Click the “I” button.
With that selected, you can click on a Pipeline, which will cause this box to spring up.
Click through the tabs till you get to the tab with your information. In this case, a Hazardous Liquid Pipeline.
This will give you the information about who operates the pipeline.
Sometimes, you want to get closer to the map to get a good handle on where the pipeline runs. WARNING: This is where people get lost and confused. If you get lost and confused, go to the top right of the screen and hit “LOGOUT” to start over again.
To Magnify, look back at our toolbar at the top of the map.
Click the Magnifying Glass with the plus on it. This will allow you to draw a square on the map like so:
The Map will zoom in, showing that square. You can magnify right down to the neighborhood you live in if you like:
Again, if you get lost, hit the “LOGOUT” button at the top right of the screen and it will start you back at selecting your state.
If you have any questions or difficulties, you can call the Pipeline Safety Trust at our number below and we will talk you through it. You can also email us at with your questions.