# ERG 2020 > Emergency Response Guidebook for hazmat incidents. (iPhone/iPad app by National Library of Medicine.) - Source: https://appshunter.io/ios/app/erg-2020/id592158838 (this page in markdown: same URL + `.md`) - Developer: [National Library of Medicine](https://appshunter.io/developer/352646071) - Category: Reference, Education - Price: Free - Rating: 4.10/5 from 53 App Store ratings · 35 written reviews indexed - Age rating: 12+ - Requires: iOS 11.0 · 51 MB - Languages: American English, French (France) - Released: 2013-01-13 - Data updated: 2026-06-08 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/erg-2020/id592158838/reviews.md ## What is ERG 2020? PHMSA (U.S. Department of Transportation Pipeline and Hazardous Materials Safety Administration)'s 2020 Emergency Response Guidebook provides first responders with a go-to resource to help deal with hazmat accidents during the critical first 30 minutes. The ERG contains an indexed list of dangerous goods and the associated ID number, the general hazards they pose and recommended safety precautions. For example, if emergency responders arrive at the scene of an overturned tractor trailer displaying a DOT hazmat placard, they would use the guide to identify the material associated with the placard and get guidance on how to respond accordingly. The 2020 version of the ERG includes general revisions, reorganized general information pages, protective distance mapping updates, and the new ability to share data links through URLs. Updated every four years, the ERG is available free to public safety agencies in all states and territories through designated state coordinators’ offices. PHMSA has partnered with the National Library of Medicine to provide this free application as well as a version of the ERG in its Wireless Information System for Emergency Responders (WISER) application. ## Key features - Indexed list of dangerous goods - Associated ID numbers - General hazard information - Recommended safety precautions - Protective distance mapping - Data link sharing ## Recent user reviews (10 of 35) All indexed reviews: https://appshunter.io/ios/app/erg-2020/id592158838/reviews.md ### 4/5 — Found a glitch *2025-09-22, version 3.1.6* Sulphur Molten UN 2448 can be classified as class 9 or class 4.1 the app only shows class 4.1 ### 1/5 — Paid version? *2023-06-18, version 3.1.6* I ain’t paying for a book I can get for free. Get bent. ### 4/5 — Good but needs help *2021-02-04, version 3.1.5* Data is easy to find. However, plume map pin can’t be moved nor is entering lat and long manually accurate. More than a mile off. This is a critical component when determining a valuation and downwind concerns. FIX IT ### 4/5 — Glossary *2020-11-03, version 3.0.84* Great app easy to use but a glossary feature would be a game changer ### 3/5 — Print feature needed *2020-07-29, version 2.1* The app is really helpful but needs a print feature. ### 3/5 — Missing links *2020-06-13, version 2.1* When I search by un # the corresponding guide page has the “map”, “guide..”, “protective distance” tabs appear. If I go through the “browse guide pages” tab instead those tabs don’t appear on the guide page? ### 5/5 — Update *2020-05-19, version 2.1* When will the 2020 update be coming out? ### 1/5 — Unreadable guide pages *2020-05-18, version 2.1* My tab to browse the guide pages is unreadable and the chemicals are all bunched up on top of each other? ### 4/5 — Great tool! *2019-07-12, version 2.1* Was easy to use and quicker than thumbing through the book. Would like to see the ability to drop the waypoint on the map when plotting isolation distances, currently you can only input addresses. Also, the text bubble used with the waypoint does not display entire text, even when screen is rotated on iPhone 7. ### 1/5 — ERG 2016 terrible *2019-06-20, version 2.1* ERG 2016 for iPhone doesn't work for the Xs Max. I have deleted it and reinstalled it with no luck. The beginning pages are all jumbled together and I can't use this. This is a great resource if it worked with this iPhone. Please fix or something. ## Frequently asked questions about ERG 2020 ### What is the Emergency Response Guidebook app? The Emergency Response Guidebook (ERG) app is a digital resource from PHMSA that provides first responders with essential information to manage hazmat accidents. It helps identify dangerous goods and offers guidance on safety precautions during the critical initial phase of an incident. ### What kind of information does the ERG 2020 app provide? The app includes an indexed list of dangerous goods with their ID numbers, general hazards they pose, and recommended safety precautions. It also features updated protective distance mapping and the ability to share data links. ### Is the ERG 2020 app free to use? Yes, the ERG 2020 app is provided free of charge by PHMSA. It is available to public safety agencies in all states and territories, and PHMSA has partnered with the National Library of Medicine to offer this free application. ### Who is the target audience for this app? The primary target audience for the ERG 2020 app is first responders, such as firefighters and law enforcement, as well as public safety agencies that may encounter hazardous materials incidents. It is designed to be a go-to resource during emergencies. ### What are the key updates in the 2020 version of the ERG app? The 2020 version includes general revisions, reorganized general information pages, updated protective distance mapping, and a new feature allowing users to share data links through URLs. These updates aim to improve usability and provide more current information. ## Version history (last 5 releases) ### 3.1.6 — 2022-02-25 ERG 2020 app has been re-released as ERG for IOS by Pipeline and Hazardous Materials Safety Administration. Please download this new version to get the latest features and updates. ERG 2020 by National Library of Medicine will no longer be supported. ### 3.1.5 — 2020-12-17 A French translation of the ERG 2020 has been added to the app! Added support for cross-language sharing. Added many small updates and improvements. ### 3.0.84 — 2020-08-08 This release includes the full Emergency Response Guidebook 2020! Sharing and collaboration is now available. Share data and protective distance maps with other mobile users. Search functionality has been improved to make it more accurate and flexible. Addressed issues with link sharing. Many small updates and improvements have been implemented. ### 3.0 — 2020-08-03 This release includes the full Emergency Response Guidebook 2020! Sharing and collaboration is now available. Share data and protective distance maps with other mobile users. Search functionality has been improved to make it more accurate and flexible. Many small updates and improvements have been implemented. ### 2.1 — 2018-11-28 Added improvements to the protective distance address search. This feature is now more responsive and includes better results. 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User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-08.*