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Certified Industrial Hygienist

A Certified Industrial Hygienist (CIH) is a person who has completed a college degree in environmental health, or science, has at least five years of relevant experience, and has successfully passed an examination with the American Board of Industrial Hygiene. Below is a listing of the subject areas covered in the exam. Maintaining the certification requires obtaining ongoing continuing education credits and recertifying every five years.

  • Air Sampling & Instrumentation
  • Analytical Chemistry
  • Basic Science
  • Biohazards
  • Biostatistics & Epidemiology
  • Community Exposure
  • Engineering Controls/Ventilation
  • Ergonomics
  • Health Risk Analysis & Hazard Communication
  • IH Program Management
  • Noise
  • Non-Engineering Controls
  • Radiation – Ionizing and Non-ionizing
  • Thermal Stressors
  • Toxicology
  • Work Environments & Industrial Processes

Areas of practice that a CIH specializes in can change over time, and the ABIH does not place restrictions on specific career paths of a CIH as long as they meet the on-going requirements and adhere to the ABIH Code of Ethics.

Industrial Hygiene Terminology