Licensed Well and Septic Contractors Based in Washington County, WI

17 licensed well and septic pros based in Washington County. Every license number below is sourced from official Wisconsin records, with a link to verify it yourself.

Grouped by the county of the address on each business's state license record, which can be a mailing address; it doesn't tell you where the business works. Where the record doesn't name the county of the address, its ZIP code decides (a ZIP that crosses a county line goes to the county holding most of its homes), then its town.

Septic Contractors based in Washington County (15)

Water Well Contractors based in Washington County (2)

Licensed by Washington County

Washington County issued these businesses' licenses, but the address on their license record is not in Washington County.

Cities in Washington County

Hiring a well and septic professional in Washington County

GroundRoster aggregates official state licensing rosters for water-well and septic (onsite wastewater) professionals into one searchable directory, refreshed regularly.

Before you sign anything: confirm the license number on this page is still active with Wisconsin, ask for proof of insurance, and get at least three written quotes; pricing on this work varies widely by site conditions.

Neighboring counties