Free

Details

  • Released
  • Updated
  • May 16, 2017
  • January 29, 2026
NPMS Public Viewer screenshot #1 for iPhone
NPMS Public Viewer screenshot #2 for iPhone
NPMS Public Viewer screenshot #3 for iPhone
NPMS Public Viewer screenshot #4 for iPhone
NPMS Public Viewer screenshot #5 for iPhone
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About

View maps of hazardous liquid and gas transmission pipelines. Discover pipeline operators, the materials they transport, and contact information. Locate pipelines by county, offshore area, or proximity to your current location.

Hazardous pipeline maps
Operator identification
Material transported details
Contact information
Location-based search
County and offshore area selection
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What's New in NPMS Public Viewer

1.4.1

January 29, 2026

Minor bug fixes

User reviews

Excellent app

We’re glad we found this app a few years ago. We understand that the public can’t zoom in too close on pipelines due to security issues, but it shows you what’s in your area, including hazardous chemical pipelines, and incidents, such as spills, that you might not know otherwise. We even had a reporter reach out to us when there was an explosion and injuries at a facility that didn’t appear on the state’s oil and gas map because the state doesn’t oversee it (nor do states oversee pipelines). It was on this map in that county. We’ve shared screenshots multiple times for many purposes and regularly recommend it.
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Please Update ASAP

This app has been out for 4 years. While it does give notice, the fact that you can’t zoom in below 2000 meters without losing “NPMS data” means an update is well past due.
The error popup (which simply says “error”) prevents any successful query. It also appears to be intermittent, but that alone is enough for an immediate uninstall.
As it is, this app is not of much use.
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Engineer

Work as intended without issue.

If this is so important, why does it not work?

I can't rate with less than 1 star.

I select a state and county, it loads, map screen comes up and immediately there is an error message on top.

ERROR
Your session has expired.
Please select a state and county
to start a new session.

App is useless as is.

Good idea if it worked

Cannot choose a state...app crashes.

Developer apps

FAQ

What is NPMS Public Viewer?

NPMS Public Viewer is an iPhone app that allows the public to view maps of hazardous liquid and gas transmission pipelines. It provides information on pipeline operators, what they transport, and contact details.

Is NPMS Public Viewer free to use?

Yes, NPMS Public Viewer is available for free on the App Store. It does not have any in-app purchases or advertisements.

What devices does NPMS Public Viewer support?

NPMS Public Viewer is designed for iPhone and iPod devices. It is not currently available for Android or other platforms.

How often is NPMS Public Viewer updated?

The latest version of NPMS Public Viewer is 1.4.1, last updated on January 29, 2026. The app was originally released on May 16, 2017.

What is the age rating for NPMS Public Viewer?

NPMS Public Viewer has an age rating of 4+, making it suitable for a wide range of users. This rating indicates general suitability with minimal mature content.

How can I find pipelines near me using NPMS Public Viewer?

You can choose to see pipelines closest to your current location. Alternatively, you can select a specific county or offshore area to view relevant pipeline maps.

Where can I find more information about NPMS?

For more details about the National Pipeline Mapping System (NPMS) or to access the full desktop browser version, you can visit the official NPMS website at https://www.npms.phmsa.dot.gov/.

What kind of data does NPMS Public Viewer display?

The app displays maps of hazardous liquid and gas transmission pipelines, including operator information, the type of material transported, and contact points for inquiries.