The state of Wisconsin keeps a log of every well ever drilled. We read all 814,554 of them.
Wisconsin well logs, made useful.
Every well log filed with WI DNR — depth, static water level, tested yield, and the driller's original report — brought together around one address, instead of one record at a time.
✓ Verified against WI DNR · 2026-08-14
What you can answer here
- How deep will my well need to be? Median and range of actual drilled depths near you — not national averages.
- What will it cost? Local median depth × published per-foot rates, with the math shown.
- Will it produce enough water? Yields from pump tests on nearby wells.
- Who drills around here? The drillers who actually filed recent well logs in your county.
Every figure here comes from the Wisconsin Department of Natural Resources Groundwater Retrieval Network (GRN) well-construction records — the state's official well-log repository. We index those same records by location so you can start from an address, and every well links back to its original filed log.
See every recorded well near any Wisconsin address: depths, water levels, yields, and links to the original driller's logs — all in one report.
Get the property report — $29Driller, agent, or inspector? Unlimited & white-label plans →
Well data by county
We mapped Wisconsin's household wells against the EPA's database of leaking underground fuel tanks — county-by-county results, methodology, and a free data download.
Read the analysis →