How to read these records

Who files

Establishments with 250 or more employees in industries not exempted by OSHA, and those with 20 to 249 employees in industries listed in OSHA's 300A table, must submit their Form 300A each year. Smaller establishments and exempt industries are absent — absence here says nothing about safety.

The rates

• TRIR (total recordable incident rate) = recordable cases × 200,000 ÷ hours worked. 200,000 hours is 100 full-time workers for a year.
• DART = cases with days away, restriction or job transfer × 200,000 ÷ hours worked.
• A rate is left blank when hours are missing, zero, or inconsistent with headcount (fewer than 200 or more than 4,000 hours per employee per year) — a rate on a wrong denominator is worse than none.

The industry median

Each rate is shown next to the median of establishments filing with OSHA in the same 4-digit NAICS industry and the same year, when at least 20 have a valid rate. It is not the national average published by the Bureau of Labor Statistics: filers are a regulatory population, not a sample.

Joining the years

OSHA's establishment number is not stable across the collection. Years are joined when the identifier and the ZIP code match, or the EIN, ZIP code and street match, or the street, ZIP code and first word of the name match — and never when that would put two different filings in the same year. Where an amended summary replaced an earlier one, the latest is kept.

What the figures cannot tell you

• Recording or reporting an injury does not mean the employer or employee was at fault, that an OSHA rule was violated, or that the employee is eligible for workers' compensation.
• OSHA cautions that concluding an establishment is the most or least dangerous solely on its rates would be inappropriate. This site ranks no one; its lists are alphabetical.
• Inspections, citations and penalties are a different OSHA dataset and are not shown here.