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Injuries, Illnesses, and Fatalities

Survey of Occupational Injuries and Illnesses Data

The Survey of Occupational Injuries and Illnesses (SOII) is a Federal/State cooperative program that publishes estimates on nonfatal occupational injuries and illnesses. Each year, approximately 200,000 employers report for establishments in private industry and the public sector (state and local government). In-scope cases include work-related injuries or illnesses to workers who require medical care beyond first aid. See the Occupational Safety and Health Administration (OSHA) for the entire recordkeeping guidelines. The 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. For more information on the scope and sampling methodology see the SOII Handbook of Methods.

SOII data are released to the public through the SOII News Release, SOII charts and tables and through the IIF public database, generally in early November.

SOII Outputs

  • Industry estimates published in SOII Annual Summary (available from 1972)
  • Case estimates published in SOII Case & Demographics (available from 1992, and as biennial estimates starting with the 2021-2022 reference period.)

The Injuries, Illness and Fatalities program publishes two broad categories of outputs based on information provided by employers. Since 1972 BLS has published summary estimates of the number and incidence rate of injuries and illnesses by industry. In 1992, BLS began publishing information on the detailed case circumstances and demographics of the injured or ill worker. These estimates historically covered only cases involving days away from work (DAFW) through 2020.

For 2011-2019, estimates for detailed case circumstances and worker demographics for cases involving job transfer or work restriction (DJTR) were also available from a subset of industry subsectors covered in a pilot study. Beginning with reference year 2021, DJTR case details  were collected across all industries, and BLS has published the first biennial estimates for both DAFW and DJTR for the two-year, 2021-2022 reference period (see below for additional details on DJTR collection and estimates). For more on workplace injuries and illnesses see our definitions page.

SOII Data Example

  • Data Example

Typically, the SOII produces over ten million publishable data points for a given reference year. A hypothetical, simplified case is illustrated below to demonstrate the breadth and depth of SOII data by its industry level and case and demographic aggregations. The following example shows some of the typical information that is provided by survey respondents on the SOII survey form.

Section 1: Establishment Information

ZYX/CBA Telecommunications1
Annual average number of employees: 670 full-time workers2
Total hours worked by all employees: 1,387,000 hours3

Section 2: Summary of Work Related Injuries and Illnesses

Number of cases with days away from work:24
Number of cases with job transfer or restriction: 15
Number of other recordable cases: 26
Total number of injuries: 4
Total number of respiratory conditions: 17

Section 3: Reporting cases

Job title: Cell Tower Tech 8
DOB: 9/13/19819, Sex: M10, Race/Ethnicity: Hispanic11
Hired: 05/10/200912
Comments: Complained of general pain13 in the lower of his back14 when his
harness15 jarringly restrained him from falling17 due to icy conditions16 on
the tower.
Incident date: 01/18/201612, 18, 21, Return date: 01/21/201618
Beginning shift: 10:00 AM20, Incident time: 11:15 AM19, 20

  • Data elements captured in SOII-Annual Summary
Category Type No. Characteristic Characteristic Value Code Coding System


1 Industry Wireless telecommunications carriers 517210 NAICS 2012


2 Class Size 670 full-time equivalent employees 250-999


3 Hours Worked 1,387,000

Case Types

4 Days Away From Work 2 OSHA
5 Days of Job Transfer or Restriction 1 OSHA
6 Other Recordable 2 OSHA
7 Illness (Respiratory condition) 1 OSHA
  • Data elements captured in SOII-Case and Demographics
Category Type No. Characteristic Characteristic Value Code Coding System


1 Industry Wireless Telecommunications Carriers (Except Satellite) 517312 NAICS 2017


8 Occupation Radio, cellular, and tower equipment installers and repairers 49-2021 SOC 2018


9 Age or Age Group 35 35-44
10 Gender Male
11 Race Hispanic and other OMB
12 Length of Service 5 years or more

Case Characteristics

13 Nature of Injury Soreness- pain- hurt--nonspecified injury 1972 OIICS 2.01
14 Part of Body Injured Lumbar region 322 OIICS 2.01
15 Source of Injury (Primary) Lifelines- lanyards- safety belts- harnesses 775 OIICS 2.01
16 Secondary Source of Injury Ice- sleet- snow 9273 OIICS 2.01
17 Event of Injury Fall or jump curtailed by personal fall arrest 45 OIICS 2.01

Temporal Characteristics

18 Days-away-from-work Group 2 Days
19 Time-of-day Group 8:01 AM to 12 Noon
20 Hours-on-the-job Group 1-2 Hours
21 Day of Week Monday

Days of Job Transfer or Work Restriction

Job transfer or restriction cases occur when, as a result of a work-related injury or illness, an employer or health care professional keeps, or recommends keeping an employee from doing the routine functions of his or her job or from working the full workday that the employee would have been scheduled to work before the injury or illness occurred.

Expanded DJTR Data Collection (reference year 2021 and forward)

BLS collected details for cases involving days of job transfer or restriction (DJTR) from all establishments starting in January 2022. BLS published biennial (2-year) estimates of the case characteristics and worker demographics for cases involving days away from work, job transfer, or restriction in November 2023 (for reference years 2021 and 2022). This shift will result in significant changes to the SOII news release and how publication tables are presented. Visit our Days of Job Transfer or Work Restriction Collection page and the Nonfatal injuries and illnesses tables for more details.

DJTR Pilot Study (Final)

From 2011 through 2019, BLS conducted a series of pilot studies to collect DJTR case details from establishments in rotating sets of six selected industry subsectors. Details about this completed study can be found on our Days of Job Transfer or Work Restriction (DJTR) page.

Series Breaks

Although SOII began collecting data in 1972, users are advised against making comparisons across the entire time period due to series breaks in the classification systems used to code SOII data. Case circumstance information is categorized according the BLS Occupational Injury and Illness Classification System (OIICS) by event or exposure, nature of injury or illness, part of body, and source of injury or illness. Occupation is classified according to the Standard Occupational Classification (SOC) and industry by the North American Industry Classification System (NAICS). Please review our Occupational Safety and Health Changes to OIICS, NAICS and SOC page to assess the changes that have occurred over your time period of interest.

Access SOII Data

Research in Progress

Contact Us

Assistance is available by contacting the Survey of Occupational Injuries and Illnesses at or (202) 691-6170.


Last Modified Date: May 3, 2024