Emergency Response Planning Guidelines (ERPGs) are air concentration guidelines for single exposures to agents and are intended for use as tools to assess the adequacy of accident prevention and emergency response plans, including transportation emergency planning, community emergency response plans, and incident prevention and mitigation.

Did you know the AIHA® Guideline Foundation is the ONLY organization responsible for establishing and publishing up-to-date airborne levels for risk assessment of a single brief exposure to chemicals? Our ERPG values and reference documents are critical resources that help end-users find credible and globally well-respected data and guidance they need for risk assessment of chemical emergencies. Application of ERPG values in this process helps to ensure that the community-wide protections you put into place will be not questioned by local and national authorities. You may also have used the ERPG values already and be aware of their applicability and status.

What makes ERPG levels special is that they cannot be overly conservative: no emergency responder wants to evacuate a downtown area to protect a population from a very mild health effect. This is quite a different approach from other groups setting population guidelines, for example: drinking water, residue tolerances in food, air quality guidelines, etc. ERPG values need to be exactly on target to support emergency responders to predict the frequency and severity of health effects that may result from the emergency exposure.

The North American ERPG (NAERPG) provides first responders with a critical go-to manual to help deal with hazardous material transportation accidents during the critical first 30 minutes and is used every day within the United States and Canada. To date, nearly 14.5 million copies have been distributed to the emergency response community through state emergency management coordinators.

Nominating a Chemical Agent

If you are interested in having a chemical reviewed or updated, please complete this form. Please note that the ERP committee does not conduct primary research; rather it reviews and assesses work done by others in creating or updating values.

We Need Your Support

Keeping the NAEPRG up to date each year takes significant time and money. The reality is that we need funding to defray the costs of this important work, and we are asking for your company’s help. Your annual donation will support literature searches, document retrievals, and annual meetings of the ERP committee as they prepare each year’s handbook.

Thank you in advance for your financial support enabling the AIHA® Guideline Foundation to continue this important work. For more information and to contribute, contact Laura Cilano Garcia or 703-846-0748. Alternatively, complete the Donor Form.

2019 Corporate Donors

The AIHA Guideline Foundation would like to thank the following generous sponsors for their contributions which support ongoing work.

ExxonMobil Biomedical Services, Inc.



Purchase ERPG/WEEL Handbook and Technical Supporting Documents

To purchase a copy of the latest ERPG/WEEL Handbook, visit the AIHA ​Marketplace​.

View a list of chemicals for which ERPG data values have been created. To purchase a technical supporting document for any chemical, please contact AIHA Customer Service and be prepared to provide the names of chemicals you are interested in.