Thank you for being a member of the American Institute of Hydrology! If your membership has lapsed and you would like to renew, please visit the appropriate renewal form.

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On behalf of the American Institute of Hydrology (AIH) Executive Committee, I am pleased to announce that we have recently undergone an executive director and association management company transition to a brand-new staff and a new office located in Sacramento, California.

We are thrilled to have our new Executive Director, Sarah Erck, and Smith Moore & Associates (SMA) on board to provide AIH’s association management services. AIH’s goals and mission as a non-profit scientific and educational organization dedicated to the certification and registration of professionals in all fields of hydrology align with the values and passions of the individuals at SMA.

We recognize that some of you may have experienced lapsed or unfulfilled requests or inquires over the past few months while we have undergone transition of association management services, exacerbated by the ongoing COVID-19 crisis. To assure that your inquiries and/or other matters are resolved soon, we request that any current or perspective AIH members reach out to Sarah, me, or either of our EC members if you have any outstanding items that require attention – or if you have any other AIH-related inquiries.

In collaboration with Sarah, SMA, and our members, the AIH Executive Committee is looking forward to next steps for advancing AIH’s goals and mission. If there is anything you need, please do not hesitate to contact Sarah and your new team, me, or either of our EC members – we are here to serve you!

John L. Nieber, P.H., P.E., Ph.D.
President of the American Institute of Hydrology

Contact information for SMA is provided below.

700 R Street, Suite 200
Sacramento, CA 95811
[email protected]

What is the American Institute of Hydrology (AIH)?

The American Institute of Hydrology (AIH), founded in 1981, is a non-profit scientific and educational organization that certifies the competence and ethical conduct of professionals in the field of hydrology. AIH's goal is to promote hydrology as a science and  profession and to help protect public interest from non-professional practices.

Take a moment to review the AIH Member Guide and our Fact Sheet to learn more about the American Institute of Hydrology.

Professionals interested in being certified as hydrologists are evaluated by the AIH Board of Registration, which consists of nationally recognized and respected scientists and professionals. Candidates are evaluated for their education and experience, and are required to take one or more written examinations to demonstrate their competency. AIH encourages and facilitates continuing education of professionals certified by it.

In addition to certifying professionals in the field of hydrology, AIH also strives to improve the professional skills and abilities of its members, the professional community, and the public at large. It does so by disseminating hydrology-related information and connecting members through the AIH Bulletin, the AIH website, and various social media platforms.  Learn more...


Water (ISSN 2073-4441) is a peer-reviewed open access journal on water science and technology, including the ecology and management of water resources, and is published monthly online by MDPI. It’s been indexed by the Science Citation Index Expanded (Web of Science) with Impact Factor of 2.544 (2019), Scopus (2019 CiteScore is 3.0) and other databases. More information at:

Hydrology (ISSN 2306-5338) is an international peer-reviewed open access journal of hydrology published quarterly online by MDPI. It is covered by the Emerging Sources Citation Index (ESCI) in Web of Science, as well as GeoRef and Scopus (2019 CiteScore: 3.2).

Who Should Apply for Certification?

If you are currently practicing in a hydrology-related field and engaged in academics or applied aspects of hydrology, you should consider applying for certification. Once you meet the minimum requirements and are prepared to take the certification examination, you can choose to apply for one of AIH's three specialty areas:
*Surface Water
*Water Quality
If you are a technician in the field of hydrology, Hydrologic Technical certification is also available. Currently enrolled students can apply for Student Membership of AIH. 

Benefits of Certification

Certification by AIH provides a means by which the public, employers, and clients can recognize those hydrologic professionals who are judged by their peers to possess the proper and necessary qualifications to practice their profession with integrity.
Benefits of being certified by AIH include:
*Peer recognition of professional competence in hydrology
*Career resources
*A nationwide network of hydrologists
*AIH Bulletin
*Access to continuing education resources