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How To Join AIH

Have Membership Questions?

AIH is a certification-based organization. Individuals interested in becoming certified must first apply for AIH membership. After approval, the applicant will take the appropriate exam. Upon receiving a passing grade, the individual will receive one of two professional designations: Professional Hydrologist (Certified) or Hydrologic Technician (Certified). An annual membership is required to maintain certification. To ensure and maintain the highest standards with our certification, members are required to recertify every five (5) years.

Get Certified

Interested individuals are required to provide supporting documentation via an application submitted to AIH. They must supply proof they’ve met the minimum educational requirements, years of experience, and have passed the appropriate examination(s) administered by AIH.

Maintain Certification

To maintain certification status, an active membership with AIH must be renewed annually.


Members are responsible for keeping records of the number of PDH/PDC they earn along with associated documentation that can be validated by AIH. Documentation is due by December 31 of every five (5) years computed from the anniversary year of the individual member in order to remain in compliance with certification. Documentation is submitted on your recertification application in Certemy. A minimum of 60 PDH/PDCs is required over 5 years to be eligible for recertification (ref – form, links and bylaws). A recommended template for a log of records for submission to AIH is shown followed by a table on conversion factors for PDH/PDC. While the list is in no way exhaustive, AIH deems the engagement by professional hydrologists in one or some of the following activities as continuing education to acquire the necessary PDH/PDCs each year.