The state of Montana keeps a log of every well ever drilled. We read all 272,830 of them.
How deep is the water under Montana?
County by county, well by well.
Median drilled depths, static water levels, tested yields, and what a new well actually costs — computed from the official record, not national averages.
✓ Verified against GWIC · 2026-07-27
100 ftmedian well depth statewide
33 ftmedian static water level
20 gpmmedian well yield
38,295wells drilled since 2016
Buying property with a well — or land you'd need to drill?
See every recorded well near any Montana address: depths, water levels, yields, and the original driller's logs.
Free address lookup Property report — $19Driller, agent, or inspector? Unlimited & white-label plans →
Looking for the filed driller's report itself? See Montana well logs — what's in one, how far back the records go, and the three ways to find one.
Well data by county
Beaverhead County
4,936 wells · median 78 ft Big Horn County
3,642 wells · median 67 ft Blaine County
1,842 wells · median 77 ft Broadwater County
3,949 wells · median 141 ft Carbon County
6,458 wells · median 58 ft Carter County
1,583 wells · median 160 ft Cascade County
7,161 wells · median 110 ft Chouteau County
2,447 wells · median 39 ft Custer County
3,225 wells · median 180 ft Daniels County
1,476 wells · median 55 ft Dawson County
3,888 wells · median 90 ft Deer Lodge County
2,587 wells · median 60 ft Fallon County
1,842 wells · median 180 ft Fergus County
3,757 wells · median 126 ft Flathead County
21,944 wells · median 191 ft Gallatin County
19,725 wells · median 80 ft Garfield County
2,234 wells · median 180 ft Glacier County
1,403 wells · median 95 ft Golden Valley County
986 wells · median 100 ft Granite County
2,395 wells · median 80 ft Hill County
3,289 wells · median 90 ft Jefferson County
5,299 wells · median 180 ft Judith Basin County
1,583 wells · median 100 ft Lake County
8,084 wells · median 180 ft Lewis and Clark County
17,141 wells · median 105 ft Liberty County
1,072 wells · median 38 ft Lincoln County
8,141 wells · median 145 ft Madison County
6,624 wells · median 100 ft Mccone County
1,883 wells · median 118 ft Meagher County
1,266 wells · median 110 ft Mineral County
1,686 wells · median 122 ft Missoula County
15,566 wells · median 100 ft Musselshell County
3,628 wells · median 177 ft Park County
6,558 wells · median 108 ft Petroleum County
777 wells · median 160 ft Phillips County
2,423 wells · median 75 ft Pondera County
1,389 wells · median 35 ft Powder River County
3,927 wells · median 168 ft Powell County
2,437 wells · median 85 ft Prairie County
1,733 wells · median 148 ft Ravalli County
21,925 wells · median 75 ft Richland County
5,003 wells · median 80 ft Roosevelt County
3,950 wells · median 60 ft Rosebud County
4,294 wells · median 100 ft Sanders County
4,891 wells · median 165 ft Sheridan County
2,395 wells · median 99 ft Silver Bow County
4,338 wells · median 95 ft Stillwater County
5,835 wells · median 60 ft Sweet Grass County
2,321 wells · median 85 ft Teton County
3,027 wells · median 30 ft Toole County
843 wells · median 38 ft Treasure County
924 wells · median 80 ft Valley County
3,117 wells · median 68 ft Wheatland County
1,081 wells · median 100 ft Wibaux County
1,384 wells · median 130 ft Yellowstone County
15,363 wells · median 35 ft
Research: homes on well water near documented fuel leaks
We mapped Montana'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 →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.