REHS/RS Credential

An updated version of the NEHA REHS/RS exam is going to be released on Wednesday, September 1, 2021. It will replace the current version that is being offered. Examinees will continue to take the existing exam now up through Tuesday, August 31, 2021.

We have developed some resources to help guide you through this transition:

  • The FAQs: NewExamFAQs.pdf ( and Revised Blueprint: REHS_RS_FINAL_Examination_Blueprint_-_October_2020.pdf ( documents are meant to help inform you. Please read these documents before contacting the NEHA office.

  • Town Hall sessions focused on exam changes. All Town Hall sesssions have taken place but recordings are available on our YouTube channel:

  • We are keenly aware that scheduling REHS/RS® exams at Pearson Vue testing centers presents challenges during COVID-19 times. We are still recommending candidates wait 90 days before re-taking an exam, but we are not enforcing it as a hard and fast policy. If a candidate chooses, they may re-schedule before 90 days. This consideration is only in place until Tuesday, August 31, 2021

    • If you are a state candidate and your state program has a different re-take window, we will continue to honor that timeframe.

  • The number of total questions is decreasing from 250 to 225. On the new exam form, there will be 200 scored and 25 unscored (pilot) questions. The current exam has 225 scored and 25 unscored (pilot) questions. The new exam will be as rigorous as the existing exam; reducing the number of questions will not make the exam easier. It’s possible, but not certain, the total length of time for exam administration will shorten as the number of questions is reduced. We are working with our testing company and Subject Matter Experts to decide on the length of test administration time. Those workshops will be taking place over the next three to four months and as soon as we have concrete information, it will be announced.

If you have any questions not covered in the NewExamFAQs.pdf (, please email Sarah at

A Professional Credential From NEHA

Images of Environmental Health Professionals working overlaid over an image of planet Earth

Since 1937 NEHA has been leading the way for practitioners to achieve a set of defined competencies, evidenced through testing and maintained through continuing education. These benchmarks of excellence have become the gold standard in recognizing those who are uniquely equipped to handle the wide breadth of environmental health issues. NEHA’s long-standing history in credentialing means that our standards are high and that individuals with a NEHA credential have mastered a body of knowledge and acquired practical experience to perform relevant work responsibilities.

As an impartial, third-party endorsement of an individual’s professional knowledge and experience, a credential stands in support of a candidate’s resume and professional references. It serves as verification that a professional has achieved a baseline level of competency in his or her subject matter.

What is an REHS/RS Credential?

No issues are more important to the communities in which we live and work than clean air, safe food, and potable water. An individual with an REHS/RS credential has the skill set to ensure that these basic community necessities are met as well as to manage other critical functions such as emergency response, vector control, sewage sanitation, hazardous material handling and more.

The REHS/RS is the most prevalent NEHA credential and professionals demonstrate competency in an impressive range of environmental health issues, directing and training personnel to respond to routine or emergency environmental situations, and providing education to their communities on environmental health concerns. In addition, REHS/RS credential holders are key members in ensuring communities are in compliance with local, state and federal environmental health regulations.

REHS/RS Credential Exam and Application  

REHS/RS Credential Candidate Information Brochure (PDF)



  • "The REHS/RS explores the breadth and scope of Environmental Health. The REHS/RS is THE premier credential with regard to environmental health."
    - Brian C., Environmental Health Director and REHS/RS credential holder since 1990
  • "The REHS/RS is all-encompassing for Environmental Health. People recognize it and it’s a good way to keep up, through continuing education, so you can do your job better."
    - Gary E., Environmental Health Manager and REHS/RS credential holder since 1991
  • "My REHS/RS credential gave me confidence to apply for jobs with industry after I retired from the state. It provides incentives for professional development and industry recognition."
    - Gary C., Food Safety Consultant and REHS/RS credential holder since 1992
  • "The REHS/RS credential enabled a vertical fast track for me in my organization. It also provides a level of credibility in discussing legislative issues or in courtroom situations"
    - Brian C., Environmental Health Director and REHS/RS credential holder since 1990