Stephen Rostkowski

License details

"Based in" is the city and county of the address on the business's license record.

What this license covers

• Site testing: licensed to run percolation tests and evaluate soils to determine what kind of system a site can support.

How to check this license

License details are indexed from state and county licensing records as of 2026-08-19. We shorten or reword some labels. The agency's record controls, and 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. Check current status at the state agency website.

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