J. J. Keller® ERG App
Emergency Response Guidebook
Free · Designed for iPad. Not verified for macOS.
The Emergency Response Guide (ERG) App provides fast access to the PHMSA Emergency Response Guidebook, supporting the initial response to hazardous materials and dangerous goods transportation incidents.
Built and maintained by J. J. Keller & Associates, Inc., a trusted provider of safety and regulatory compliance solutions, the app is based on the latest published edition of the ERG and designed for speed and clarity when time matters most.
Users can browse the full guidebook in a mobile‑optimized format, navigate indexed and color‑coded sections, and search by UN number or material name to quickly locate response guidance. Visual identification tools support material recognition using hazmat placards, road trailer visuals, and rail car references. The app works fully offline, making it reliable in emergency scenes and low‑connectivity environments.
Designed for field use, the ERG App supports light and dark mode for readability in all conditions and serves as a trusted reference for first responders, transportation professionals, and safety personnel.
Ratings & Reviews
The developer, J. J. Keller & Associates, Inc., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Contact Info
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- J. J. Keller & Associates, Inc.
- Size
- 156.8 MB
- Category
- Reference
- Compatibility
Requires iOS 16.2 or later.
- iPhone
Requires iOS 16.2 or later. - iPad
Requires iPadOS 16.2 or later. - Mac
Requires macOS 13.1 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Age Rating
13+
- 13+
- Infrequent
Medical Treatment information
- Copyright
- © Copyright 2026 J. J. Keller & Associates, Inc.