Assess risk for unanticipated chemical exposures. Make better decisions. Save lives.
When lives are at stake, having fast access to reliable information is critical.
Emergency Response Planning Guidelines (ERPG™) from the AIHA® Guideline Foundation provide planners and emergency responders with threshold exposure levels to aid in the protection of communities from the potential dangers of single, brief chemical exposures. They give you clear benchmarks for evaluating risks in anticipation of or during a chemical release and a practical framework for responding to incidents.
Developed by an all-volunteer committee of experts from diverse disciplines, our guidelines give you FREE access to verified data and supporting science so you can make better decisions quickly, communicate clearly with colleagues and the public, and take action to plan for or respond to sudden exposures.
Visual: ERPG Max Concentrated Airborne Levels
Access our new free online ERPG resource.
The AIHA® Guideline Foundation now offers an online resource that makes ERPGs and their supporting technical documentation easier to find, navigate, and apply. This digital platform gives you fast access to ERPG values, background science and explanatory materials—all in one place and free to the entire professional community. Whether you are planning for potential releases or making real-time decisions, this new tool ensures you have trusted information wherever and whenever you need it.
Explore the new ERPG online resource© 2025 American Industrial Hygiene Association (AIHA). All rights reserved. The Emergency Response Planning Guidelines (ERPG®) data are the intellectual property of AIHA and are provided solely for non-commercial, educational, research, and governmental use. Users may download, reproduce, and distribute this data only in its original, unmodified form and must include this notice in any reproduction. Commercial use, redistribution, resale, or inclusion of this data in any product or service offered for profit is strictly prohibited without the prior written consent of AIHA. To request permission for commercial use or licensing, contact erpg@aiha.org
The most current and accessible Emergency Response Planning Guidelines.
The AIHA Guideline Foundation’s ERPGs are the only actively updated and freely available guidelines that address short-duration airborne exposures.
We are committed to actively developing emergency response guidelines and making them available to our professional community at no cost. Our committee reviews and adds new chemicals to ensure we address emerging hazards and our guidelines remain a relevant and useful resource for anyone utilizing them in their work.
If you are interested in having a chemical reviewed or updated, please complete this form.
(Please note that the ERPG committee does not conduct primary research; instead, we examine and assess work done by others to create or update values.)
Support our work: Donate to the AIHA Guideline Foundation
Your support helps maintain this essential resource. Please consider a donation to ensure ERPGs are current, freely available and responsive to the profession and the communities we all protect.
Nominating a Chemical Agent
If you are interested in having a chemical reviewed or updated, please complete this form. Please note that the ERPG Working Group does not conduct primary research; instead, it examines and assesses work done by others to create or update values.
The AIHA Guideline Foundation is a proud sponsor of TRANSCAER, which serves as a resource for free hazmat and emergency response training.