Publications & Order Forms


This past year, the IOWWA Board worked on designing a Homeowner Education Folder for our members to purchase and hand out while servicing or installing new septic systems.  The folder has information for the specifics of the system and household, a maintenance record section, installer / designer / maintenance provider information, information on how to locate a septic system, DO & DONTS of maintaining a septic system, and a place to add the diagram of the system as well as your contact information.  The folder was also designed with a pocket so you can add other information as well.  You can purchase these folders for $2.00 per folder in increments of 10.  You can have them directly shipped to you or you can pick them up from one of your Board members, just specify your preferred method of delivery at the time of order.  To order, you can print out and complete the order form.   For questions, please email

Installation of Wastewater Treatment Systems Handbook (CIOWTS Study Guide)


This study guide, published by the Consortium of Institutes for Decentralized Wastewater Treatment, is a 464-page notebook that serves as a self-study aid for those interested in testing for the Certified Installer of Onsite Wastewater Treatment Systems (CIOWTS) credential.    The handbook is also a valuable office or field reference guide.  Order through Iowa State University:  Installation of Wastewater Treatment Systems Manual.  NOTE: You must set up an account to purchase - the password must be a MINIMUM of 12 characters. 

Certified Installer of Onsite Wastewater Treatment Systems (CIOWTS) HANDBOOK.

The CIOWTS Handbook is available for review and download in the below "Documents and Files" section.   The primary purpose of the certification credential is to set a standard of practice and create a baseline of knowledge for onsite wastewater system installations. Iowa counties are encouraged to adopt regulations providing for licensing of installers and to require CIOWTS certification.

Refer to the tab "Certification" for additional information.


The two-color IOWWA decal (apple green and navy blue) can be ordered in four-, eight- and twelve-inch diameters. These peel-and-stick decals can be affixed to vehicles, equipment and toolboxes to announce your affiliation with your industry's state organization. Let customers know that you support the professional standards that IOWWA maintains for its membership.   Click here for the order form.

        Soil-based Wastewater Treatment  - Published by the Soil Science Society of America

Soil-based Wastewater Treatment addresses the needs of practitioners, engineers, scientists, regulators, resource managers, planners, and others with a need to know about septic systems. It arose after discussions about the need for a text that integrated current understanding of the hydrologic, physical, chemical, and biological processes involved in the treatment of wastewater using soil. In the authors' experience, people have a fragmented understanding of what these systems are, how they function, how wastewater moves through soil, how and which pollutants are removed, and how these systems impact the environment and public health. The relevant information is scattered across disciplines, information sources and audiences. This book is an attempt to collect and integrate this information in one place, and provide a scientific framework for understanding soil-based.  

For information about this publication, please select this link: Soil-based Wastewater Treatment.  IOWWA members receive a 20% discount.   You will be required to create an account and at check-out, enter the code SBWT to receive the 20% discount.  Published by the Soil Science Society of America.

file IOWWA - CIOWTS HANDBOOK 0.28 MB           
file IOWWA Homeowner Folder Order Form 0.08 MB           
file IOWWA Decal Order Form 0.05 MB