New data about hazardous materials shippers released April 5th, 2024.

PHMSA's Office of Hazardous Materials Safety (OHMS) sponsored an expansion of the 2022 Commodity Flow Survey to include supplemental questions about hazardous materials (hazmat) and collect new data from hazmat shippers that use DOT-regulated packaging.

Based on this new data collection, the U.S. Census Bureau (Census) and OHMS worked together to develop a first-of-its-kind dataset for public release, which Census and OHMS have jointly published as the 2021-2022 Expanded Hazmat Supplement (EHM). Census has published the new data as an "Experimental Data Product" on their website here.

You can also download the data and supporting documentation here:

• EHM 2022 Public Release Data

• EHM 2021 Public Release Data

• EHM Experimental Data Product Methodology

• Overview -- EHM Experimental Data Product

• User Guide for Commodity Flow Survey: Expanded HAZMAT Supplement

Feedback:

The 2021-2022 Expanded Hazmat Supplement is a pilot project supported by the OHMS Research, Development & Technology (RD&T) program. PHMSA welcomes your suggestions for improvement and other feedback. Additionally, PHMSA is interested in learning how you or your organization plan to utilize the new 2021-2022 EHM data.

Questions and feedback can be sent via e-mail to the OHMS RD&T team at HAZMATRESEARCH@dot.gov.