# NPMS Public Viewer

> View hazardous pipeline maps, operator details, and contact information. (iPhone/iPad app by Pipeline and Hazardous Materials Safety Administration.)

- Source: https://appshunter.io/ios/app/npms-public-viewer/id1232277603 (this page in markdown: same URL + `.md`)
- Developer: [Pipeline and Hazardous Materials Safety Administration](https://appshunter.io/developer/954888820)
- Category: Reference, Utilities
- Price: Free
- Rating: 4.00/5 from 4 App Store ratings · 5 written reviews indexed
- Age rating: 4+
- Requires: iOS 14.0 · 2 MB
- Languages: American English
- Released: 2017-05-16
- Data updated: 2026-06-09
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/npms-public-viewer/id1232277603/reviews.md

## What is NPMS Public Viewer?

The Pipeline and Hazardous Materials Safety Administration’s (PHMSA) National Pipeline Mapping System (NPMS) has developed the NPMS Public Viewer iPhone app to allow the public to view hazardous liquid and gas transmission pipeline maps. The user can see who operates a pipeline, what it transports, and who to contact for further information. To get started, a user may choose one county or offshore area (including state waters or federal waters) or choose to see pipelines closest to the user’s current location. For more information about the NPMS, or to access the full desktop browser version of the NPMS Public Map Viewer, go to the NPMS website at https://www.npms.phmsa.dot.gov/.

## Key features

- Hazardous pipeline maps
- Operator identification
- Material transported details
- Contact information
- Location-based search
- County and offshore area selection

## Recent user reviews (5 of 5)

All indexed reviews: https://appshunter.io/ios/app/npms-public-viewer/id1232277603/reviews.md

### 5/5 — Excellent app

*2024-05-11*

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.

### 1/5 — Please Update ASAP

*2022-09-07*

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.

### 5/5 — Engineer

*2020-07-21*

Work as intended without issue.

### 1/5 — If this is so important, why does it not work?

*2020-03-18*

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.

### 1/5 — Good idea if it worked

*2019-08-31*

Cannot choose a state...app crashes.

## Frequently asked questions about NPMS Public Viewer

### 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.

## Version history (last 5 releases)

### 1.4.1 — 2026-01-29

Minor bug fixes

### 1.4.0 — 2025-08-21

Minor changes- Upgraded tileEngine.

### 1.3.9 — 2025-05-29

Update abandoned opid field.

### 1.3.8 — 2025-04-04

Minor changes to sync frontend changes with backend changes. Clean up and minor fixes.

### 1.3.6 — 2025-01-16

-Abandoned Pipeline Layer

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## More apps by Pipeline and Hazardous Materials Safety Administration

- [RIN Locator](https://appshunter.io/ios/app/rin-locator/id954888821)
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All apps by Pipeline and Hazardous Materials Safety Administration: https://appshunter.io/developer/954888820

## Related topics

[npms public viewer](https://appshunter.io/ios/topics/npms-public-viewer) · [npms](https://appshunter.io/ios/topics/npms) · [phmsa](https://appshunter.io/ios/topics/phmsa)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-09.*