The American Board of Industrial Hygiene (ABIH), a not-for-profit corporation, has been the world's largest premier organization for certifying professionals in the practice of industrial hygiene. ABIH is responsible for ensuring high-quality certification application and examination processes, certification maintenance and ethics governance and enforcement.

Bowen EHS provides courses for clients wishing to take the CIH examination. The actual examination is administered by the American Board of Industrial Hygiene (ABIH). To find out more about certification and your eligibility, please contact the ABIH directly.

At a Glance

Certifying Agency
American Board of Industrial Hygienists (ABIH)
Web Site
517-321-2638 (USA)
Web Contact
Certification info
Test centers


Exam Information

The CIH exam consists of 150 scored items and an additional 30 experimental questions. The multiple choice questions are designed to assess the knowledge and skills required to function as a certified practitioner in the field. The exam is 5.0 hours in length with an optional 30-minute break in the middle.  After you have been approved to sit for the exam and paid your $350 exam fee, you will be able to schedule your exam with Prometric.

Examinations are offered at Prometric testing locations during two windows -- April-May and October-November. You can schedule an exam anytime within those windows (depending on the hours of your chosen test center - some are open Sundays, some aren't).