Overview of OSHA 300/300A

The Occupational Safety and Health Administration (OSHA) requires workplace recordkeeping via OSHA Form 300. Form 300 is a log used to classify all work-related injuries and illnesses. Employers must keep a log on site.

Form 300

The Log of Work-Related Injury and Illnesses (Form 300) is used for the classification of work-related injuries and illnesses and to note the extent and severity of each case. When an incident occurs, employers use the Log to record specific details about what happened and how it happened.


The Summary is Form 300A. It gives the totals for the year in each category. At the end of the year, the Summary should be posted in a visible location so employees are made aware of the injuries and illnesses within the workplace.

Work-related Injury or Illness

Injuries or illnesses are considered work-related if an event or exposure in the workplace caused or contributed to the condition or aggravated a preexisting condition. The following work-related injuries or illnesses that must be recorded are those that result in: death, days lost from work, loss of consciousness, restricted work activity, resulting job transfer, or medical treatment requiring more than first aid. In addition, OSHA states that employers must record work-related injuries and illnesses that are significant or meet any of the additional criteria. Additional Criteria is listed as :

  • any needlestick injury or cut from a sharp object that is contaminated with another person’s blood or other potentially infectious material.
  • any case requiring an employee to be medically removed under the requirements of an OSHA health standard.

  • tuberculosis infection as evidenced by a positive skin test or diagnosis by a physician or other licensed health care professional after exposure to a known case of active TB.

  • an employee's hearing test (audiogram) reveals 1) that the employee has experienced a Standard Threshold Shift (STS) in hearing in one or both ears (averaged at 2000, 3000, and 4000 Hz) and 2) the employee's total hearing level is 25 decibels (dB) or more above audiometric zero ( also averaged at 2000, 3000, and 4000 Hz) in the same ear(s) as the STS.

Employers are also expected to record any significant work-related injury or illness that is diagnosed by a physician or other licensed health care professional; and must record any work-related case involving cancer, chronic irreversible disease, a fractured or cracked bone, or a punctured eardrum.

You can find specific instructions regarding Form 300 and Form 300A at https://www.osha.gov/recordkeeping/new-osha300form1-1-04.pdf.

Detailed information relating to this post may be found at www.osha.gov.

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