The state of Montana keeps a log of every well ever drilled. We read all 272,443 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 · 2026-06-10
100 ftmedian well depth statewide
33 ftmedian static water level
20 gpmmedian well yield
37,915wells 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 — $19Well data by county
Beaverhead County
4,930 wells · median 78 ft Big Horn County
3,640 wells · median 67 ft Blaine County
1,842 wells · median 77 ft Broadwater County
3,946 wells · median 141 ft Carbon County
6,442 wells · median 58 ft Carter County
1,583 wells · median 160 ft Cascade County
7,149 wells · median 110 ft Chouteau County
2,447 wells · median 39 ft Custer County
3,221 wells · median 180 ft Daniels County
1,476 wells · median 55 ft Dawson County
3,888 wells · median 90 ft Deer Lodge County
2,582 wells · median 60 ft Fallon County
1,840 wells · median 180 ft Fergus County
3,752 wells · median 126 ft Flathead County
21,885 wells · median 191 ft Gallatin County
19,678 wells · median 80 ft Garfield County
2,234 wells · median 180 ft Glacier County
1,402 wells · median 95 ft Golden Valley County
986 wells · median 100 ft Granite County
2,388 wells · median 80 ft Hill County
3,289 wells · median 90 ft Jefferson County
5,293 wells · median 180 ft Judith Basin County
1,583 wells · median 100 ft Lake County
8,068 wells · median 180 ft Lewis And Clark County
17,127 wells · median 105 ft Liberty County
1,072 wells · median 38 ft Lincoln County
8,128 wells · median 145 ft Madison County
6,603 wells · median 100 ft Mccone County
1,880 wells · median 118 ft Meagher County
1,263 wells · median 110 ft Mineral County
1,683 wells · median 122 ft Missoula County
15,558 wells · median 100 ft Musselshell County
3,628 wells · median 177 ft Park County
6,550 wells · median 107 ft Petroleum County
777 wells · median 160 ft Phillips County
2,422 wells · median 75 ft Pondera County
1,391 wells · median 35 ft Powder River County
3,921 wells · median 168 ft Powell County
2,435 wells · median 84 ft Prairie County
1,733 wells · median 148 ft Ravalli County
21,892 wells · median 74 ft Richland County
4,998 wells · median 80 ft Roosevelt County
3,948 wells · median 60 ft Rosebud County
4,284 wells · median 100 ft Sanders County
4,880 wells · median 164 ft Sheridan County
2,394 wells · median 100 ft Silver Bow County
4,334 wells · median 95 ft Stillwater County
5,817 wells · median 60 ft Sweet Grass County
2,313 wells · median 85 ft Teton County
3,022 wells · median 30 ft Toole County
837 wells · median 38 ft Treasure County
924 wells · median 80 ft Valley County
3,114 wells · median 68 ft Wheatland County
1,081 wells · median 100 ft Wibaux County
1,384 wells · median 130 ft Yellowstone County
15,354 wells · median 35 ft
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 companies that actually filed recent well logs in your county.