CIOWTS Certified Installer Search

The CIOWTS Installer Search lists current year IOWWA Members who have obtained the CIOWTS credential.   The logo depicts whether the credential is held by IOWWA or by the National Environmental Health Association (NEHA).   If a credential holder is not listed, check the membership status using the IOWWA Member Search.   Membership in IOWWA is NOT the same as the CIOWTS installer credential. 

Members and non-members
, please refer to the "CIOWTS Member and Non-member List" PDF file in the Documents & Files below.

The IOWWA CIOWTS Certified Search is provided as a membership benefit and as a resource for those in need of onsite wastewater information. The Iowa Onsite Waste Water Association (IOWWA) does not endorse or recommend any member firm.

NOTE:  If you signed up for the IOWWA 2021 Conference Pandemic Credit (9.0 CE hours), it is NOT approved for the INDR Time of Transfer.  Refer to the IDNR Operator Certification website to verify your Time of Transfer continuing education hours:

Certified Installer Search

Search for an IOWWA Certified Installer near you!

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