The Certified Industrial Hygienist program has been accredited by:

  • American National Standards Institute (ANSI)
  • National Commission for Certifying Agencies (NCCA)

In addition, ABIH is a recognized certification board by the International Occupational Hygiene Association (IOHA).

The ANSI accreditation was awarded under the ANSI standard ISO/IEC 17024 - Conformity assessment - General requirements for bodies operating certification of persons and was effective on March 13, 2009. The ANSI accreditation is good for a 5-year period and ABIH will be subject to ongoing demonstration of its continuous improvement under the ISO/IEC 17024 standard. ABIH is currently undergoing the reaccreditation process for its next 5 year period.


In September, 2013, the ABIH received NCCA accreditation of its CIH program by showing compliance with the NCCA’s Standards for the Accreditation of Certification Programs.  NCCA is the accrediting body of the Institute for Credentialing Excellence.  Since 1977, the NCCA has been accrediting certifying programs based on the highest quality standards in professional certification to ensure the programs adhere to modern standards of practice in the certification industry. The NCCA accreditation is good for a 5 year period and ABIH will be subject to annual reporting to ensure continued compliance to the standards.

Representing the global community, IOHA is an association of organizations from across the world, all of which are dedicated to the discipline and application of the inherent principles of occupational hygiene. ABIH’s certification scheme has been recognized by IOHA since 2003.

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