POWTS Inspector

License Information

Per Wis. Admin. Code § 305.66, a person who holds a certification issued by the Department as a certified POWTS Inspector may inspect privately owned wastewater treatment systems, POWTS, for the purpose of administering and enforcing the provisions of Wis. Admin. Code § SPS 381 to 387 as an authorized representative of the Department or a local governmental unit.

A person who inspects privately owned wastewater treatment systems as a certified POWTS Inspector shall:

  • Maintain a record of the inspections made including the dates and the findings of the inspections; 
  • Provide a copy of the inspection record to the privately owned wastewater treatment system owner or his or her agent;
  • Make available to the Department upon request his or her inspection records.

Application for License

3151Application for POWTS Inspector Certification
3073Trades Payment Form

Reinstate a POWTS Inspector Certification that has been Expired more than 4 Years

  1. Complete requirements for the method you are applying under (see Form #3151 for more information).
  2. Submit an application, supporting documentation and fee:
    • Application for POWTS Inspector Certification (Form #3151)
    • See Form #3151 for total fee for the method you are applying under

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 DSPSCredTrades@wisconsin.gov.

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.