CIOWTS Certified Installer Search

The Certified Installer of Onsite Wastewater Treatment Systems (CIOWTS) credential installer search lists current year IOWWA members who have obtained the CIOWTS credential and, as members of IOWWA, are also IOWWA Board Certified Installers.   The logo depicts whether the credential is held by IOWWA or by the National Environmental Health Association (NEHA).


To review members and non-members, please refer to the "CIOWTS List as of 06/01/2017, Members and Non-Members" 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 waste water information. The Iowa Onsite Waste Water Association (IOWWA) does not endorse or recommend any member firm.


Certified Installer Search

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