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601 Essentials of Occupational Safety and Health
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Hazard Communications

More than 30 million workers in the United States are potentially exposed to one or more chemical hazards. There are an estimated 650,000 existing hazardous chemical products, and hundreds of new ones are being introduced annually. This poses a serious problem for exposed workers and their employers.

OSHA inspector citing a worker for not wearing PPE.
Hazard communication is one of the most frequently cited violations.

2025 Top 10 OSHA Standard Violations

OSHA’s Top 10 list of the most frequently cited standards for fiscal year 2025 includes familiar names, with Fall Protection – General Requirements leading the list for the 15th consecutive year.

  1. Fall protection, construction (1926.501)
  2. Hazard communication standard, general industry (1910.1200)
  3. Ladders, construction (1926.1053)
  4. Control of Hazardous Energy (lockout/tagout), general industry (1910.147)
  5. Respiratory Protection, general industry (1910.134)
  6. Fall Protection Training, construction (1926.503)
  7. Scaffolding, construction (1926.451)
  8. Powered industrial trucks, general industry (1910.178)
  9. Eye and Face Protection, construction (1926.102)
  10. Machine Guarding, general industry (1910.212)

Knowledge Check Choose the best answer for the question.

1-1. How many hazardous chemicals are estimated to exist in the workplace?