All Nonfatal Injuries & Illnesses charts are based on the BLS Survey of Occupational Illnesses and Injuries (SOII) that collects work-related injury and illness data annually from approximately 200,000 private industry and public sector establishments. SOII excludes all work-related fatalities as well as nonfatal work injuries and illnesses to the self-employed; to workers on farms with 10 or fewer employees; to private household workers; to volunteers; and to federal government workers.

Fatal Injury charts are based on the BLS Census of Fatal Occupational Injuries (CFOI). CFOI uses multiple sources to identify, verify, and profile fatal worker injuries. Information about each workplace fatal injury is obtained by cross referencing the source records, such as death certificates, workers' compensation reports, and Federal and State agency administrative reports.

The NIOSH Fatalities in Oil and Gas Extraction (FOG) database collects detailed information about worker fatalities in the U.S. oil and gas extraction industry. This information is used by NIOSH, the oil and gas extraction industry, and other stakeholder groups to better understand fatal incidents and to guide interventions that will prevent future loss of life. FOG is not a complete census of all US OGE worker fatalities. It is a subset. Patterns displayed on this webpage may be different than those displayed by other data sources. Any statistical analyses or statements about industry-wide trends using FOG data should take into account the limitations of FOG’s underlying methodology, as well as statistical best practices. A full description of the inclusion and exclusion criteria, data sources, and limitations for the FOG database can be found on the About NIOSH FOG website. Definitions for all key variables are found on the NIOSH FOG Variable website. FOG data presented in WHC is reported at the fatality level. Some of these fatalities are a result of incidents resulting in multiple fatalities.

Severe Nonfatal Injuries & Illnesses charts are based on the Days Away From Work subset of the BLS Survey of Occupational Illnesses and Injuries (SOII) where the severity of the injuries and illnesses required days away from work to recuperate. See All Nonfatal Injuries & Illnesses for charts based on all injuries and illnesses.