The state of Ohio keeps a log of every well ever drilled. We read all 516,806 of them.

Ohio well logs, made useful.

Every well log filed with ODNR — 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 ODNR · 2026-08-13

100 ftmedian well depth statewide

31 ftmedian static water level

15 gpmmedian well yield

52,251wells drilled since 2016

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.

These are ODNR records

Every figure here comes from the Ohio Department of Natural Resources (ODNR) Division of Geological Survey water-well log database — 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.

What's in a Ohio well log → · About ODNR →

Buying property with a well — or land you'd need to drill?

See every recorded well near any Ohio address: depths, water levels, yields, and links to the original driller's logs — all in one report.

Get the property report — $29

Driller, agent, or inspector? Unlimited & white-label plans →

Well data by county

Adams County 1,344 wells · median 71 ft Allen County 7,124 wells · median 70 ft Ashland County 6,028 wells · median 110 ft Ashtabula County 5,626 wells · median 60 ft Athens County 927 wells · median 80 ft Auglaize County 3,233 wells · median 115 ft Belmont County 1,157 wells · median 105 ft Brown County 264 wells · median 92 ft Butler County 4,338 wells · median 60 ft Carroll County 6,855 wells · median 140 ft Champaign County 6,473 wells · median 95 ft Clark County 11,928 wells · median 89 ft Clermont County 691 wells · median 72 ft Clinton County 2,134 wells · median 95 ft Columbiana County 9,922 wells · median 135 ft Coshocton County 4,810 wells · median 102 ft Crawford County 4,286 wells · median 60 ft Cuyahoga County 4,395 wells · median 84 ft Darke County 7,582 wells · median 102 ft Defiance County 2,786 wells · median 88 ft Delaware County 5,423 wells · median 75 ft Erie County 1,683 wells · median 68 ft Fairfield County 15,119 wells · median 102 ft Fayette County 3,028 wells · median 87 ft Franklin County 17,416 wells · median 96 ft Fulton County 4,384 wells · median 101 ft Gallia County 516 wells · median 73 ft Geauga County 17,126 wells · median 105 ft Greene County 8,981 wells · median 93 ft Guernsey County 2,226 wells · median 112 ft Hamilton County 1,118 wells · median 80 ft Hancock County 5,213 wells · median 68 ft Hardin County 3,166 wells · median 90 ft Harrison County 1,747 wells · median 123 ft Henry County 2,221 wells · median 78 ft Highland County 2,006 wells · median 100 ft Hocking County 5,070 wells · median 222 ft Holmes County 7,173 wells · median 152 ft Huron County 3,251 wells · median 63 ft Jackson County 931 wells · median 85 ft Jefferson County 1,378 wells · median 130 ft Knox County 9,554 wells · median 140 ft Lake County 3,421 wells · median 80 ft Lawrence County 457 wells · median 82 ft Licking County 18,993 wells · median 140 ft Logan County 6,449 wells · median 119 ft Lorain County 2,572 wells · median 60 ft Lucas County 6,902 wells · median 82 ft Madison County 5,012 wells · median 105 ft Mahoning County 11,584 wells · median 120 ft Marion County 4,315 wells · median 80 ft Medina County 11,342 wells · median 95 ft Meigs County 832 wells · median 91 ft Mercer County 5,044 wells · median 150 ft Miami County 8,489 wells · median 87 ft Monroe County 599 wells · median 100 ft Montgomery County 7,812 wells · median 80 ft Morgan County 1,240 wells · median 76 ft Morrow County 5,415 wells · median 85 ft Muskingum County 4,900 wells · median 110 ft Noble County 385 wells · median 100 ft Ottawa County 5,384 wells · median 75 ft Paulding County 2,973 wells · median 61 ft Perry County 3,952 wells · median 120 ft Pickaway County 5,989 wells · median 93 ft Pike County 928 wells · median 70 ft Portage County 18,880 wells · median 95 ft Preble County 4,457 wells · median 80 ft Putnam County 4,482 wells · median 78 ft Richland County 13,212 wells · median 126 ft Ross County 3,560 wells · median 76 ft Sandusky County 6,757 wells · median 90 ft Scioto County 1,651 wells · median 55 ft Seneca County 5,554 wells · median 93 ft Shelby County 4,906 wells · median 113 ft Stark County 23,106 wells · median 120 ft Summit County 25,674 wells · median 82 ft Trumbull County 8,476 wells · median 98 ft Tuscarawas County 10,310 wells · median 138 ft Union County 7,625 wells · median 100 ft Van Wert County 2,684 wells · median 100 ft Vinton County 1,733 wells · median 260 ft Warren County 4,359 wells · median 61 ft Washington County 1,221 wells · median 85 ft Wayne County 16,747 wells · median 110 ft Williams County 5,076 wells · median 101 ft Wood County 7,117 wells · median 80 ft Wyandot County 3,597 wells · median 87 ft

Research: homes on well water near documented fuel leaks

We mapped Ohio'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 →