Sodium in Idaho well water
In Idaho, sodium was detected in 100% of 32,974 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 Idaho 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 Idaho: 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 |
|---|---|---|---|---|---|
| Adams | no limit | 176 | 100% | 10.9 | 62 mg/L |
| Ada | no limit | 1,637 | 100% | 31 | 230 mg/L |
| Bear Lake | no limit | 233 | 100% | 30.7 | 560 mg/L |
| Benewah | no limit | 350 | 100% | 7.91 | 120 mg/L |
| Bannock | no limit | 697 | 100% | 30 | 200 mg/L |
| Blaine | no limit | 402 | 100% | 5.42 | 330 mg/L |
| Boise | no limit | 218 | 100% | 17.8 | 160 mg/L |
| Bonner | no limit | 688 | 100% | 4.13 | 150 mg/L |
| Bonneville | no limit | 442 | 100% | 15 | 200 mg/L |
| Boundary | no limit | 229 | 100% | 9.1 | 80.6 mg/L |
| Bingham | no limit | 1,159 | 100% | 16 | 213 mg/L |
| Camas | no limit | 139 | 100% | 13.4 | 96 mg/L |
| Canyon | no limit | 1,813 | 100% | 51 | 394 mg/L |
| Caribou | no limit | 501 | 100% | 29.2 | 384 mg/L |
| Cassia | no limit | 651 | 100% | 38.5 | 2,000 mg/L |
- Paris CCD, Bear Lake County100% detected of 80
- Montpelier CCD, Bear Lake County100% detected of 146
- Plummer CCD, Benewah County100% detected of 75
- Tensed CCD, Benewah County100% detected of 74
- Horseshoe Bend CCD, Boise County100% detected of 58
- St. Maries CCD, Benewah County100% detected of 201
- Idaho City CCD, Boise County100% detected of 90
- Sandpoint CCD, Bonner County100% detected of 158
- Clark Fork CCD, Bonner County100% detected of 97
- Priest River CCD, Bonner County100% detected of 155
- Blanchard-Glengary CCD, Bonner County100% detected of 278
- Arco CCD, Butte County100% detected of 2,189
- Garden Valley CCD, Boise County100% detected of 70
- West Camas CCD, Camas County100% detected of 51
- East Camas CCD, Camas County100% detected of 88
- Parma CCD, Canyon County100% detected of 212
- Caldwell CCD, Canyon County100% detected of 191
- Wilder CCD, Canyon County100% detected of 219
- Melba CCD, Canyon County100% detected of 192
- Huston CCD, Canyon County100% detected of 137
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.