24 - Mason City

The Martin-Brower Company LLC

2400 15th Street SW, Mason City, IA 50401
424410 (NAICS 424410)

DART 9.13 11 recordable cases · 98 avg employees · 197,172 hours worked

This establishment vs. the industry

The DART rate at this establishment is 1.7× the industry median.

This establishment: 9.13
Industry median (General-line groceries merchant wholesalers, n=990): 5.51

Reported injury and illness, 2024

Fatalities0 Days-away-from-work cases4 Restricted-duty / transferred cases5 Other recordable cases2 Total recordable cases11 Days lost to injury134

Injury rates (per 100 FTE-year, OSHA standard)

DART rate9.13 (days away + restricted/transferred) DAFW rate4.06 (days away from work only) Total recordable rate (TRIR)11.16 (all OSHA-recordable cases) Annual average employees98 Total hours worked197,172
What these numbers mean. An OSHA-recordable case is a work-related injury or illness that resulted in death, days away from work, restricted work, transfer to another job, medical treatment beyond first aid, loss of consciousness, or significant injury diagnosed by a physician. DART rate is the OSHA-standard incidence measure — calculate it as (cases with days away + restricted/transferred) × 200,000 / hours worked. The 200,000 hours normalizes to 100 full-time-equivalent workers over a year. National average DART across all industries is around 1.7; high-risk industries (skilled nursing, warehousing, courier) routinely exceed 5.

Source: OSHA ITA 300A Summary Data, calendar year 2024 filings (downloaded 2026-05-22).

OSHA Lookup · workplace-injury data from OSHA ITA 300A 2024 · About / methodology