In response to the current state of emergency with the coronavirus, IOWWA will adjust the existing “grace period” of 60 days, plus the current time of this emergency.  This will end when we can safely offer workshops. This goes into effect as of March 15, 2020.  We will adjust the policy as necessary to accommodate all credential holders who would be unable to attain required CIOWTS continuing education hours training during this time.  When circumstances become safe to once again resume attendance at workshops, IOWWA will end the extended “grace period” date and resume the current 60 day grace period policy.  Your credential renewal expiration date will remain the same as well as invoicing for your credential renewal.  

IDNR Time of Transfer - The IA Dept. of Natural Resources has implemented an enforcement and compliance protocol in recognition of the extraordinary circumstances facing the state from COVID-19.  All questions should be directed to Cory Frank at 515-725-8404 or emailed to cory.frank@dnr.iowa.gov.  Refer to the DNR compliance protocol statement at IDNR Time of Transfer

The primary purpose of the 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 the certifying of installers and to require the CIOWTS  credential.  Counties currently requiring the Basic Level CIOWTS credential are Benton, Black Hawk, Bremer, Buchanan, Butler, Cedar, Chickasaw, Dallas, Delaware, Floyd, Grundy, Hamilton, Hardin, Iowa, Jasper, Jones, Linn, Marion, Scott, Story, Warren, Washington, and Winneshiek.   Please check with your county sanitarian for specific requirements.  Clayton County will require the CIOWTS starting July 1 of 2021. 

A pass score of 70% or higher must be achieved to receive the CIOWTS credential.    The credential runs on a two-year cycle.   During each two year cycle, the credential holder must have a minimum of 12.0 hours of continuing education earned in the onsite wastewater industry.      IOWWA has events scheduled throughout the year that provide continuing education approved for the CIOWTS credential.   For those taking the Installation Overview course prior to a scheduled test, the 12.0 CE hours earned will be applied to the first two-year cycle.

CIOWTS Test Study GuideThis study guide, published by the Consortium of Institutes for Decentralized Wastewater Treatment, is a 450 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.  The study guide can be ordered through Iowa State University, use this link:  Installation of Wastewater Treatment Systems Manual.

IOWWA 2020 Member and Non-Member CIOWTS List:  To review IOWWA members and non-members who have the CIOWTS credential, please refer to the "CIOWTS Members and Non-Members List" PDF file in the Documents & Files section below

Friday, December 11, 2020 - CIOWTS TEST  - TENTATIVELY SCHEDULED
 Keystone Area Education Agency, 1400 Second St. NW, Conference Room D-4-5, Elkader IA
CIOWTS Test check-in 12:30 to 1:00 PM; Test Instruction 1:00 PM; Test starts promptly at 1:15 PM.  The three page test application (see below for download options) must be submitted to IOWWA prior to November 20, 2020

The application can be downloaded from the below "Documents and Files" section.  There are three (3) format options to use to complete the CIOWTS Test Application:

1)  Word Document - Download, print, complete by hand.
2) Word Form Field - Download, complete tabbing between form fields and save.
3) PDF Form Field - Download, complete by tabbing between form fields and save.

Sponsored by IOWWA, the one and a half day Installation Overview course is available for the benefit of those taking the CIOWTS exam as well as anyone who requires continuing education.   You are not required to take the Installation Overview prior to the test.    Continuing education earned from the Installation Overview will be credited to the first two-year credential cycle.  


Breaks and lunches are included for both days.
Location: Keystone Area Education Agency, 1400 Second Street NW, Conference Room D-4-5, Elkader, IA  The CIOWTS test will be held on Friday, Dec. 4 following the course.    The course is NOT required prior to taking the test.  It is an option only.
Thursday, Dec. 10 - check-in 7:30 AM | 8:00 AM - 5:00 PM; 
Friday, Dec. 11 - check-in 7:30 AM | 8:00 AM to 12:00 noon (lunches included)
The Installation Overview course is approved for 12.0 hours of continuing education and is available to anyone who currently requires continuing education.
IOWWA member fee: $215.00 / non-member fee: $335.00

For both the Basic and Advanced Levels you must verify that you are at least 16 years old.   Proof of age must be submitted prior to taking the test at the test site registration (e.g. copy of driver’s license or birth certificate).   

Basic Level Exam - 75 questions, 2 hours to complete
Advanced Level Exam - 125 questions, 3 hours to complete

All questions are written in multiple choice format.   The CIOWTS exam is based upon the following content areas.  Next to each subject area the approximate percentage of questions in that content area on the exam.   State and local codes are not part of the test.

1. Knowledge of site plans; basic surveying; topography; site features
2. Knowledge of materials requirements; standards and specifications; soil profile descriptions; pump performance; treatment and dispersal technologies
3. Ability to conceptualize an installation activity
4. Ability to make mathematical calculations of area, volume, elevation, rates, measures and weights

1. Knowledge of installation plans; elevations; topography
2. Ability to transfer designer’s plan to site; reconcile variations; identify conflict
3. Knowledge of equipment needs and limitations; materials and supplies; soil characteristics
4. Ability to make mathematical calculation
5. Ability to identify subcontractor and homeowner needs and potential conflicts

1. Knowledge of soil characteristics; ability to recognize soil characteristics in the field
2. Knowledge of specifications and installation techniques for tanks, baffles, filters and screens, piping and fittings, aggregate and fill material, proprietary treatment components, pumps and siphons, liner materials, valves, switches and tubing
3. Knowledge of electrical requirements
4. Knowledge of gravity and pump/siphon dosed system requirements
5. Knowledge of timers and remote monitoring
6. Knowledge of bedding, testing, pipe connection methodologies
7. Knowledge of pump performance specifications; total dynamic head in pressurized systems
8. Ability to make mathematical calculations, conversions

The CIOWTS credential runs on a two-year cycle.   During each two year cycle, the credential holder must have a minimum of 12.0 hours of continuing education earned in the onsite wastewater industry.      IOWWA has events scheduled throughout the year that provide continuing education approved for the CIOWTS credential.   For those taking the Installation Overview course prior to a scheduled test, the 12.5 CE hours earned will be applied to the first two-year cycle.

If CE hours are obtained at an event not sponsored by IOWWA, prior approval for the course will need to made to IOWWA.  Course title, description and presenter(s) biography information will need to be submitted to IOWWA at least 30 days prior to the event.     If you receive CE hours from other sources be sure to provide IOWWA with a copy of your certificate or record of CE hours earned.  Email to info@iowwa.com or fax to 1-480-802-6643.  

Continuing education earned at workshops sponsored by the DMACC Onsite Wastewater Training Center are pre-approved by IOWWA.  You MUST submit a copy of your certificate of attendance to IOWWA.   DMACC does not provide IOWWA with attendee information.

CONTINUING EDUCATION SEARCH:   For the CE search, you can enter a full name, at least 4 letters of the first or last name, or at least 4 letters from the company name.     The results will show all records within the search criteria.  To see the data for only one person, find their name in the list and click on the name.  The listing shows IOWWA members as well as non-members.

The list will include continuing education hours as noted in the IOWWA database.    If an event is not listed, please email info@iowwa.com the Certificate of Attendance showing the event name, sponsoring affiliation, location, date of event and continuing education hours received.

IMPORTANT NOTE FOR CIOWTS CREDENTIAL HOLDERS:  You must know your current credential cycle dates when checking your continuing education.    Events listed are for 2 years however only those that fall within your two year CIOWTS credential cycle will count.

There are several options available to verify credential status:

* In the Documents & Files section, open the "CIOWTS Member and Non-member List".   This is an alphabetical listing of those who currently hold the CIOWTS credential.
* Use the CIOWTS Certified Installer Search (search by zip code).   This will result in a list of current year IOWWA members who hold the CIOWTS credential.
* Another option is to select "Continuing Education Search" on the left side.   This search will show IOWWA members and non-members and allows you to search by name or company name.   The information lists the credential level (B-Basic or A-Advanced) as well as the credential expiration date.
* In the member search, you are able to search by zip code and the logo will show if the person holds the CIOWTS credential.