The CSB's reporting rule requires prompt reports to the CSB from owners or operators of facilities that experience an accidental release of a regulated substance or extremely hazardous substance that results in a death, serious injury or substantial property damage.

CSB's Accidental Release Reporting Rule Data

CLICK HERE to download the most recent list of reportable events (updated January 25, 2023)  

CLICK HERE to download the list of reportable events (updated December 28, 2022

CLICK HERE to download the list of reportable events (updated October 26, 2022)

CLICK HERE to download the list of reportable events (updated July 27, 2022)   

CSB Guidance Document on Accidental Release Reporting Rule 

Previous Data Releases 

CLICK HERE to download the current list of reportable events (updated May 2022) 

The CSB's reporting rule form should be downloaded and submitted to 



Relevant Regulations 

40 CFR 1604 - Accidental Release Reporting 

The CSB's Accidental Release Reporting Rule Data                                                                                         


The regulation governing the reporting of accidental release can be found at title 40 Code of Federal Regulations (CFR) Part 1604, Reporting of Accidental Releases (​).
The regulation requires the owner or operator of a stationary source to report any accidental release resulting in a fatality, serious injury, or substantial property damage​s. The purpose of this part is to require prompt notification of any accidental release within the Chemical Safety and Hazard Investigation Board’s (CSB's) investigatory jurisdiction.  
The CSB’s Accidental Release Database includes all accidental release incidents reported since March 23, 2020, the effective date of the Accidental Release Reporting regulation. The database is revised quarterly and may include revisions or corrections to events previously reported and events that were not timely reported to the CSB in accordance with the regulation.