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Hersey, Mark

Licensed septic contractor based in Kiel, Manitowoc County, WI

License details

License number	670984
License type	POWTS Installer
Based in	Kiel, Manitowoc County, Wisconsin 53042
Licensed by	Washington County
Work types on the roster	POWTS Installation

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

What this license covers

Installation / repair: licensed to build and install septic tanks and drainfields, and to repair or replace failed ones.

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 license #670984 directly with the agency that issued it, confirm it is still active, and ask for a current certificate of insurance.

Source: Washington County POWTS Program, last checked 2026-08-19. Look it up at the issuing agency.

See every listing based in Manitowoc County or in Kiel.