IOWWA's Mission

"To protect Iowa's water resources, support our members, encourage professionalism, and promote consistent application of onsite wastewater services through continuing education."


We are excited to provide this informative web site as a service to our members and the public. The web site has a very easy to use search function to find members based on a zip code search, with access to members with the Certified Installer Onsite Waste Water Treatment Systems (CIOWTS) certification.  CIOWTS credentialed members are also IOWWA Board Certified Installers.  You are able to preview and register on-line for upcoming training events.  The site also allows you to sign up and pay your membership dues on-line.  

Register now for the IOWWA 2017 Annual Conference, January 11-12, 2017, Iowa Events Center | Hy-Vee Hall, Des Moines IA.

Click on the "Conference" link on the left side of the IOWWA Home Page. 

UPCOMING WORKSHOPS!    IOWWA is pleased to announce that we have added a safety workshop to the fall schedule.     Construction Focus Four Training and Hazard Assessment, Mitigation and Training for Workers Exposed to Residential Sewage will be held on Wednesday, Sept. 28, 2016 at the Des Moines Area Community College, FFA Enrichment Center, 1055 SW Prairie Trail Parkway, Ankeny, IA (the FAA Enrichment Center adjoins the DMACC Campus).    The instructor is John Thomas, Executive Director, Washington Onsite Sewage Association.    Refer to the "Upcoming Trainings" listing for additional details.   IOWWA will also host the Be A Lab Tech for a Day: Waste Water Collection, Lab Analysis and Reporting on Thursday, Oct. 27, 2016 in Coralville.   The Installation Overview course and CIOWTS Testing will be held Nov. 14-15 in Estherville IA.  


"Member Search" shows those members for the

2016 IOWWA Membership Year. 

Since inception in 1999, the Iowa Onsite Waste Water Association (IOWWA) works to educate its members and public about the benefits of quality onsite wastewater treatment. IOWWA is one of the largest state organizations in the country focused on the onsite wastewater industry. Our members number more than 400 and include regulators, installation contractors, maintenance contractors, soil scientists, engineers, manufacturers and educators.  Join now or renew your membership using the on-line membership application!

Membership starts from the date joined through the end of the calendar year and must be paid yearly.    To check your membership status, please enter your zip code in the member search field.   If your name is not listed, membership would need to be renewed for the current year.


Need to locate a septic product supplier, service provider or onsite wastewater professional in your area? IOWWA's Member Search is the perfect resource to find onsite wastewater industry professionals. You can enter your zip code on the right hand side of this page or click here.


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.    Click on the link to the left "Publications and Order Forms" for detailed information and the order form.



Check out the IOWWA video web site by clicking the link, IOWWA Videos.  The site provides thumbnail images, by subject matter, for various IOWWA activities.   Upon clicking the thumbnail, you will be able to view the video.     Additional information is available on the IOWWA Conference page as well as the Habitat for Humanity page.

IOWWA Policy

It is the policy of the Iowa Onsite Waste Water Association (IOWWA) that no individual be excluded from any association activity based on the grounds of race, color, national origin, gender, religion, age, or disability.