This list is not all inclusive; being listed on our website is optional. For those not listed or to determine if the installer is basic or advanced; request to see a copy of their ID card. You may also verify registration by contacting the Onsite Wastewater Program at (573) 751-6095.

Click on a county in the map below to see a list of Missouri Onsite System Registered Installers who serve that county.
List will display under the map.

Contact Us if you have questions about this list, or to update or correct an address.

Also, a listing of Suspended/Revoked Installers is available.

List will display under the map.