Model Aquatic Health Code (MAHC)

Model Aquatic Health Code

The Centers for Disease Control and Prevention (CDC) released the first edition of the Model Aquatic Health Code (MAHC) on Friday, August 29, 2014

CDC's Model Aquatic Health Code (MAHC)

The MAHC is the only all-inclusive national model pool code. It is based on scientific data and best practices gathered by public health and aquatics industry experts. Thus, it is easier to adopt and implement. Unlike legislation, the MAHC is voluntarily adopted, wholly or in part, and driven by your expertise. It is free, accessible to all, and backed by the Centers for Disease Control and Prevention (CDC).

Click here to read about the MAHC.

Click here to view the MAHC Infographic!


The MAHC is updated every two years by the Council for the Model Aquatic Health Code (CMAHC). The CMAHC, a nonprofit organization, was created to support and improve the MAHC by gathering input and advice from industry stakeholders. The CMAHC held its first Biennial Conference before the 2015 World Aquatic HealthTM Conference in Scottdale, Arizona in October. Members of the CMAHC presented over 150 Change Requests at the first Vote on the Code, then proceeded to vote on the changes between November 21-December 20, 2015. To participate in future CMAHC Conferences please visit the website, Conference for the Model Aquatic Health Code or email Susan Wichmann.

Why You Should Support the MAHC

Every five or ten years, health departments contact stakeholders and experts to ask for input on the town, city, county, or state code. A group of people meet for many hours over several months to debate everything from changing depth marking specs, entrapment devices, cyanuric acid levels, circulation rates, water replacement vs. reduced backwashing, chemical feeder rates, and whether operators should be trained. Their predecessors are questioned as the new committee tries to figure out why they chose what they did in the past. The process repeats itself again, five-ten years later, as a new health official calls a new group together to reassess the code.

It happens so often, it seems normal. “Normal” does not mean it is good or efficient. Isn't it about time that we have one model, science-based, standard that includes all the supporting rationale for the code? Isn't it about time we have a public domain (free) guideline we can all debate, refine and adopt?

From the expertise of hundreds of volunteers and thousands of commenters, we now have a free, science-based Model Aquatic Health Code. Make it your own, or, make it better and then make it your own. Let's be part of the world we want to be in, not the "normal" world we have all had to endure.

How You Can Get Involved

The CMAHC is looking for members and sponsors to help continue to move the MAHC forward and support adoption. Volunteers are also needed to fill vital roles in the proposed submission review and discussion process. Click here to get involved.

To learn more about the CMAHC, please visit their website.


Go to the CMAHC website to download buttons, fact sheets, infographics, and other resources.