Sodium in Montana well water
In Montana, sodium was detected in 100% of 26,309 tested private well samples.
Sodium enters wells with road salt and from softeners. EPA's guidance level of 20 mg/L matters for people on sodium-restricted diets; most people are not affected below 250 mg/L.
Check your sodium number
Type the value from your lab report. It is compared to the EPA limit, the same way the full interpretation does it.
Test your Montana well for sodium
Certified lab analysis of your own tap water, bottles and prepaid return shipping included. The Essential well panel covers arsenic, uranium, nitrate, lead, copper, manganese, iron, sodium and bacteria; radon and PFAS are add-ons.
Order the Tap Score well water test kit, from $209Already tested? Upload the report
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Systems that remove sodium
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Some links below are affiliate links. If you buy through one, the merchant pays us a commission at no extra cost to you. It does not change which products we list or what the data says.
For sodium
Under-sink reverse osmosis system
under-sink or countertop, about $300
Look for NSF/ANSI 58 certification listing the contaminant you need removed.
Rather have it installed and sized for your well? Book a free in-home water test with a licensed local company.
Where to get a well tested for sodium in Montana: certified labs, state programs and prices.
By county, from individual samples
Public monitoring samples against the EPA limit; counties with at least 30 samples.
| County | Above EPA limit | Samples | Detected | Median | Highest |
|---|---|---|---|---|---|
| Big Horn | no limit | 668 | 100% | 430 | 5,200 mg/L |
| Blaine | no limit | 136 | 100% | 103 | 2,850 mg/L |
| Broadwater | no limit | 82 | 100% | 39.6 | 414 mg/L |
| Carbon | no limit | 77 | 100% | 96.4 | 3,150 mg/L |
| Carter | no limit | 42 | 100% | 215 | 1,200 mg/L |
| Cascade | no limit | 64 | 100% | 53 | 2,100 mg/L |
| Chouteau | no limit | 63 | 100% | 440 | 9,800 mg/L |
| Custer | no limit | 132 | 100% | 410 | 1,800 mg/L |
| Daniels | no limit | 51 | 100% | 52 | 520 mg/L |
| Dawson | no limit | 129 | 100% | 290 | 45,800 mg/L |
| Deer Lodge | no limit | 128 | 100% | 24 | 138 mg/L |
| Fallon | no limit | 80 | 100% | 350 | 1,100 mg/L |
| Fergus | no limit | 150 | 100% | 80.5 | 2,100 mg/L |
| Flathead | no limit | 115 | 100% | 3 | 335 mg/L |
| Beaverhead | no limit | 165 | 100% | 20.1 | 290 mg/L |
- Fort Peck Reservation CCD, Roosevelt County100% detected of 267
- Big Hole Basin CCD, Beaverhead County100% detected of 46
- Dillon CCD, Beaverhead County100% detected of 89
- Opheim CCD, Valley County100% detected of 32
- Fort Belknap CCD, Blaine County100% detected of 104
- Glacier National Park CCD, Flathead County100% detected of 44
- Missoula CCD, Missoula County100% detected of 36
- Fort Peck Reservation CCD, Valley County100% detected of 71
- Flathead Reservation CCD, Lake County100% detected of 103
- Anaconda CCD, Deer Lodge County100% detected of 41
- Warm Springs CCD, Deer Lodge County100% detected of 87
- Troy CCD, Lincoln County100% detected of 46
- Libby CCD, Lincoln County100% detected of 94
- Chester CCD, Liberty County100% detected of 36
- Otter CCD, Powder River County100% detected of 1,018
- Broadus CCD, Powder River County100% detected of 68
- East Powder River CCD, Powder River County100% detected of 38
- South of the Yellowstone CCD, Sweet Grass County100% detected of 40
- Glacier National Park CCD, Glacier County100% detected of 32
- Geyser CCD, Judith Basin County100% detected of 31
Sources
- Individual samples from the USGS Water Quality Portal and state monitoring, summarized per geography. sodium counts and shares are listed on each county and town page with their sources.