An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

CHIEF Listserv

The Emission Inventory and Analysis Group (EIAG) and the Measurement Policy Group (MPG) maintain the CHIEF Listserv.  Once you subscribe to CHIEF you will receive notices of conferences, new EIAG and MPG documents, updates on electronic reporting, and other emission factor and inventory information via e-mail.

To join the CHIEF Listserv, send an e-mail to

To unsubscribe from the Listserv, send an e-mail to