Montana water data · Zip Code in Missoula County
ZIP 59803: well depth, groundwater and water rights
What the public record says about water in ZIP code 59803: how deep wells go, where the water table sits, what wells produce, which water rights are on file, and which documented environmental sites are nearby. Area statistics orient you; a property report analyzes the records around one specific parcel.
Updated September 2026 · Based on 2,150 public records from MBMG GWIC, Montana DNRC, Montana DEQ, EPA UST Finder, US Census (ZIP Code Tabulation Area)
Wells on record
995
10.3 per sq mi
Median well depth
136 ft
half of wells 97–220 ft
Median static water level
82 ft
882 measurements
Median tested yield
20 gpm
926 pump tests
Well depth
How deep are wells in ZIP 59803?
Of 962 wells with a recorded total depth, the median is 136 feet. Half were drilled between 97 and 220 feet; one in ten went deeper than 390 feet and one in ten found water shallower than 66 feet. Depth is set by local geology and position on the landscape, both of which change over short distances, so the spread matters as much as the median.
Static water level
82 ft
median depth to water at rest · half between 39 and 114 ft
The static level is how far below ground the water stands before pumping, measured by the driller at completion. It affects pump setting and operating cost, and it moves with season and with neighbouring use.
Well yield
20 gpm
median tested yield · half between 12 and 30 gpm
3% of tested wells produced under 5 gallons per minute and 59% produced 20 or more. These are short completion tests, not sustained-capacity tests; a household typically needs 3 to 5 gpm with storage.
Drilling activity
Recent well drilling in ZIP 59803
54 wells have been completed here since 2016, 5 of them in the last twelve months. The newest log on file was completed September 7, 2026. Records run back to 1875.
What the wells are for
- Domestic871
- Irrigation66
- Stockwater42
- Public Water Supply24
- Unused7
How they were drilled
- Rotary681
- Churn81
- Cable73
- Forward Rotary6
Drillers filing well logs in ZIP 59803
- Western Montana Drilling Co.20 since 2016 · 2026
- Jeromes Drilling Co15 since 2016 · 2022
- Camp Well Drilling And Pump Service8 since 2016 · 2025
- Camp Well Drilling & Pump Supply4 since 2016 · 2018
- Western Montana Drilling Company4 since 2016 · 2024
- Eslinger Drilling & Pump Service1 since 2016 · 2017
- Camp Well Drilling264 all-time · 2012
- Jeromes Drilling Co216 all-time · 2008
Ranked by well logs filed with GWIC, public record only. Not an endorsement, a referral or a paid listing; we have no business relationship with these companies. Verify licensing with the Montana Board of Water Well Contractors before hiring.
Water rights
Water rights on file in ZIP 59803
Montana DNRC lists 1,147 water rights with a point of diversion inside this area: 934 groundwater and 213 surface water, 1,063 of them active. The median priority date is 1981, and the oldest claim dates to 1866.
Types of right
- Ground Water Certificate701
- Statement Of Claim348
- Exempt Notice45
- Provisional Permit41
- 62-73 Ground Water Record10
Purposes
- Domestic394
- Domestic; Lawn And Garden196
- Irrigation142
- Stock130
- Lawn And Garden49
DNRC basins
- 76H1,088
- 76G37
- 76M22
Area totals describe the neighbourhood, not any one parcel. Montana publishes no authoritative link between a parcel and a water right; whether a right attaches to a specific property is a property-level question that our reports answer with the DNRC abstract linked.
Aquifers and geology
What wells in ZIP 59803 draw from
Drillers record the aquifer a well is completed in. The units below account for the wells here that carry an aquifer assignment; the median depth beside each is for wells completed in that unit.
- Alluvium (pleistocene)360 wells · 44% · median 120 ft
- Sediments (tertiary)255 wells · 31% · median 180 ft
- Belt Supergroup133 wells · 16% · median 265 ft
- Alluvium (holocene)57 wells · 7% · median 43 ft
- Sand And Gravel (tertiary)7 wells · 1% · median 140 ft
Aquifer assignments are the driller's, recorded at completion, and many older logs carry none. Absence of an assignment is not evidence about the geology.
Environmental groundwater screening
Documented environmental sites in ZIP 59803
Petroleum releases
4
0 open · 4 resolved
Superfund program sites
0
none on the National Priorities List
Registered tank facilities
4
underground storage tanks, current and historical
A documented release or site in the area is not evidence that any particular well is affected. Whether a release reaches a well depends on groundwater flow direction, geology, well depth and construction, the extent of the plume and the cleanup performed. The most recent release reported here dates to 1997. A property report screens the sites within a quarter, half and one mile of a specific parcel and links the agency records.