Soil Tester

​​​​​​​​​​​​​​​​​​​​ ​The Electronic Safety and Licensing ​Application (eSLA) is now live for Soil Tester. Public Lookup is also live for this credential. Visit the Customer Information page for​ instructions on first-time login, and to view the full list of program areas in eSLA. ​​​​

                                Go to​​​​ ​​to get started​.​

​License Information

Per Wis. Admin. Code § SPS 305.33, no person may conduct soil evaluations relative to the discharge or disposal of liquid domestic wastes into the soil unless the person holds a certification issued by the Department as a certified Soil Tester.

A certified Soil Tester who, as an employee of a local governmental unit, is responsible for administering regulations governing private onsite wastewater treatment systems may not provide soil evaluations relative to the design, installation or maintenance of private onsite wastewater treatment systems within the boundaries of the local governmental unit and adjacent local governmental units.

Application for Licensure

3099Application for Soil Tester Certification
3073Trades Payment Form

Reinstate a Soil Tester Certification that has been Expired more than 4 Years

Submit an application, supporting documentation and fee:

  • Application for Soil Tester Certification (Form #3099)
  • $135.00 total fee ($35.00 application fee, $75.00 exam fee, and $25.00 late renewal fee)

Renewal Information


Renewal Methods

Department of Safety and Professional Services

Trades Credentialing Unit
PO Box 78780
Milwaukee, WI  53293-0780​


If you have questions regarding your renewal, please email

When mailing your renewal, please allow up to 21 calendar days [per Wis. Admin. Code SPS 305.04 (1)] from the date your payment is processed to receive an update regarding your renewal.