# Wisconsin — Private well water testing at property sale: which states require it

For Wisconsin, testing required at sale? is State law does not require a well inspection or water testing for a property transfer, and DNR is not involved in the real estate transaction; authority is NR 812, Wis. Adm. Code, verified against its source on 2026-08-19.

- **State:** Wisconsin _(our reading, not quoted from the source)_
- **Testing required at sale?:** State law does not require a well inspection or water testing for a property transfer, and DNR is not involved in the real estate transaction _(verified: appears in the quote below)_
- **Authority:** NR 812, Wis. Adm. Code _(verified: appears in the quote below)_

## What the source says

> State law does not require a well inspection or water testing for a property transfer, and DNR is not involved in the real estate transaction. However, if a well inspection is conducted, state law has provided since June 1, 2008, that it must be done by a licensed well driller or licensed pump installer.

## Source

- https://dnr.wisconsin.gov/topic/Wells/RETransfer.html

Last verified: 2026-08-19. Review by: 2027-08-19.
Part of [Private well water testing at property sale: which states require it](https://referencesource.org/well-water-testing-at-property-transfer/).