GroundRosterLicensed Well and Septic Contractors in Wisconsin
Wisconsin lists 759 licensed well and septic contractors: 205 well drillers and pump installers and 554 septic contractors. They are based in 69 counties and 297 cities. 29 license classes appear, covering roles such as drilling / construction, pumping / cleaning and installation / repair.
Checked against Wisconsin DNR - Licensed Water Well Drillers / Registered Well Driller Businesses, Washington County POWTS Program, St. Croix County Community Development Department and Wood County POWTS Program. Roster copy last refreshed 2026-08-19.
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Counties with the most listings based there
Browse Wisconsin by county
Each listing sits under the county of the address on its license record, which can be a mailing address. 69 counties have listings based there.
Cities with the most listings based there
Septic Pumpers by city in Wisconsin
Septic Tank Pumping cost guide
Septic Installers by city in Wisconsin
Septic System Installation cost guide
Septic Inspectors by city in Wisconsin
Well Drillers by city in Wisconsin
Looking for a specific contractor? Search by name, business name, or license number.
Hiring a well and septic professional in Wisconsin
Before you sign anything: confirm the license on this page is still active with the agency that issued it, ask for proof of insurance, and get at least three written quotes; pricing on this work varies widely by site conditions.
How do I check a well and septic professional's license in Wisconsin?
Use the license search to find the listing by name, business name, or license number, then confirm it with the agency that issued the license. Every listing links to the roster it came from.
What does well or septic work cost in Wisconsin?
Our cost guides give national ranges for well drilling, well pump repair, septic tank pumping, septic cleaning, repairs, and inspections. Site conditions, access, and local demand set the real number, so get at least three written quotes from licensed well and septic pros in Wisconsin.
Is a permit required?
Usually, for a new system or well and for most repairs, and the rules are set by the state or the county. Our Wisconsin permit guide covers who issues them and what they cover.
Listings without a county
49 listings have no county we could place: the license record gives none, and its ZIP code or town doesn't settle one. Search by ZIP, or browse by the town on the record:
Permits and Wisconsin agency resources
Do I need a permit for well or septic work in Wisconsin? ›
Where this Wisconsin data comes from
- Wisconsin DNR - Licensed Water Well Drillers / Registered Well Driller Businesses · source page
- Washington County POWTS Program · source page
- St. Croix County Community Development Department · source page
- Wood County POWTS Program · source page