Petersen Supply
License details
| License type | ATU Maintainer |
| Based in | Fredonia, Ozaukee County, Wisconsin 53021 |
| Licensed by | Walworth County |
| Work types on the roster | Aerobic Treatment Unit Maintenance |
"Based in" is the city and county of the address on the business's license record.
What this license covers
- Pumping / cleaning: licensed to pump out and clean septic tanks, service them, and haul the waste.
How to verify this license
We publish the license details exactly as they appear in the public licensing records of the agency that issued the license; we do not vouch for the business itself. Before hiring, look up this license directly with the agency that issued it, confirm it is still active, and ask for a current certificate of insurance.
Source: Walworth County POWTS Program, last checked 2026-08-19. Look it up at the issuing agency.
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