# Montana Well Data

> County-level water well statistics for Montana — median drilled depth, static water level, and tested yield — computed from 272,443 official well records in the Montana Bureau of Mines and Geology GWIC database. Refreshed weekly; statistics last computed 2026-06-10.

Every county page includes: median/quartile well depths, static water levels, pump-test yields, a drilled-depth histogram, drilling cost estimates (local median depth × cited per-foot rates), and the drilling companies active in that county since 2016. All figures link back to source records.

- [Methodology and sources](https://montanawelldata.com/methodology/): filters, statistics, cost method, corrections policy
- [Data changelog](https://montanawelldata.com/changelog/): every refresh, with record counts
- [Address lookup](https://montanawelldata.com/lookup/): wells near any Montana address

## County pages

- [Beaverhead County](https://montanawelldata.com/counties/beaverhead/): 4,930 wells, median depth 78 ft
- [Big Horn County](https://montanawelldata.com/counties/big-horn/): 3,640 wells, median depth 67 ft
- [Blaine County](https://montanawelldata.com/counties/blaine/): 1,842 wells, median depth 77 ft
- [Broadwater County](https://montanawelldata.com/counties/broadwater/): 3,946 wells, median depth 141 ft
- [Carbon County](https://montanawelldata.com/counties/carbon/): 6,442 wells, median depth 58 ft
- [Carter County](https://montanawelldata.com/counties/carter/): 1,583 wells, median depth 160 ft
- [Cascade County](https://montanawelldata.com/counties/cascade/): 7,149 wells, median depth 110 ft
- [Chouteau County](https://montanawelldata.com/counties/chouteau/): 2,447 wells, median depth 39 ft
- [Custer County](https://montanawelldata.com/counties/custer/): 3,221 wells, median depth 180 ft
- [Daniels County](https://montanawelldata.com/counties/daniels/): 1,476 wells, median depth 55 ft
- [Dawson County](https://montanawelldata.com/counties/dawson/): 3,888 wells, median depth 90 ft
- [Deer Lodge County](https://montanawelldata.com/counties/deer-lodge/): 2,582 wells, median depth 60 ft
- [Fallon County](https://montanawelldata.com/counties/fallon/): 1,840 wells, median depth 180 ft
- [Fergus County](https://montanawelldata.com/counties/fergus/): 3,752 wells, median depth 126 ft
- [Flathead County](https://montanawelldata.com/counties/flathead/): 21,885 wells, median depth 191 ft
- [Gallatin County](https://montanawelldata.com/counties/gallatin/): 19,678 wells, median depth 80 ft
- [Garfield County](https://montanawelldata.com/counties/garfield/): 2,234 wells, median depth 180 ft
- [Glacier County](https://montanawelldata.com/counties/glacier/): 1,402 wells, median depth 95 ft
- [Golden Valley County](https://montanawelldata.com/counties/golden-valley/): 986 wells, median depth 100 ft
- [Granite County](https://montanawelldata.com/counties/granite/): 2,388 wells, median depth 80 ft
- [Hill County](https://montanawelldata.com/counties/hill/): 3,289 wells, median depth 90 ft
- [Jefferson County](https://montanawelldata.com/counties/jefferson/): 5,293 wells, median depth 180 ft
- [Judith Basin County](https://montanawelldata.com/counties/judith-basin/): 1,583 wells, median depth 100 ft
- [Lake County](https://montanawelldata.com/counties/lake/): 8,068 wells, median depth 180 ft
- [Lewis And Clark County](https://montanawelldata.com/counties/lewis-and-clark/): 17,127 wells, median depth 105 ft
- [Liberty County](https://montanawelldata.com/counties/liberty/): 1,072 wells, median depth 38 ft
- [Lincoln County](https://montanawelldata.com/counties/lincoln/): 8,128 wells, median depth 145 ft
- [Madison County](https://montanawelldata.com/counties/madison/): 6,603 wells, median depth 100 ft
- [Mccone County](https://montanawelldata.com/counties/mccone/): 1,880 wells, median depth 118 ft
- [Meagher County](https://montanawelldata.com/counties/meagher/): 1,263 wells, median depth 110 ft
- [Mineral County](https://montanawelldata.com/counties/mineral/): 1,683 wells, median depth 122 ft
- [Missoula County](https://montanawelldata.com/counties/missoula/): 15,558 wells, median depth 100 ft
- [Musselshell County](https://montanawelldata.com/counties/musselshell/): 3,628 wells, median depth 177 ft
- [Park County](https://montanawelldata.com/counties/park/): 6,550 wells, median depth 107 ft
- [Petroleum County](https://montanawelldata.com/counties/petroleum/): 777 wells, median depth 160 ft
- [Phillips County](https://montanawelldata.com/counties/phillips/): 2,422 wells, median depth 75 ft
- [Pondera County](https://montanawelldata.com/counties/pondera/): 1,391 wells, median depth 35 ft
- [Powder River County](https://montanawelldata.com/counties/powder-river/): 3,921 wells, median depth 168 ft
- [Powell County](https://montanawelldata.com/counties/powell/): 2,435 wells, median depth 84 ft
- [Prairie County](https://montanawelldata.com/counties/prairie/): 1,733 wells, median depth 148 ft
- [Ravalli County](https://montanawelldata.com/counties/ravalli/): 21,892 wells, median depth 74 ft
- [Richland County](https://montanawelldata.com/counties/richland/): 4,998 wells, median depth 80 ft
- [Roosevelt County](https://montanawelldata.com/counties/roosevelt/): 3,948 wells, median depth 60 ft
- [Rosebud County](https://montanawelldata.com/counties/rosebud/): 4,284 wells, median depth 100 ft
- [Sanders County](https://montanawelldata.com/counties/sanders/): 4,880 wells, median depth 164 ft
- [Sheridan County](https://montanawelldata.com/counties/sheridan/): 2,394 wells, median depth 100 ft
- [Silver Bow County](https://montanawelldata.com/counties/silver-bow/): 4,334 wells, median depth 95 ft
- [Stillwater County](https://montanawelldata.com/counties/stillwater/): 5,817 wells, median depth 60 ft
- [Sweet Grass County](https://montanawelldata.com/counties/sweet-grass/): 2,313 wells, median depth 85 ft
- [Teton County](https://montanawelldata.com/counties/teton/): 3,022 wells, median depth 30 ft
- [Toole County](https://montanawelldata.com/counties/toole/): 837 wells, median depth 38 ft
- [Treasure County](https://montanawelldata.com/counties/treasure/): 924 wells, median depth 80 ft
- [Valley County](https://montanawelldata.com/counties/valley/): 3,114 wells, median depth 68 ft
- [Wheatland County](https://montanawelldata.com/counties/wheatland/): 1,081 wells, median depth 100 ft
- [Wibaux County](https://montanawelldata.com/counties/wibaux/): 1,384 wells, median depth 130 ft
- [Yellowstone County](https://montanawelldata.com/counties/yellowstone/): 15,354 wells, median depth 35 ft