Chloride in Idaho well water
In Idaho, chloride was detected in 100% of 37,847 tested private well samples.
Chloride mainly comes from road salt and water softener discharge. Above 250 mg/L water tastes salty and corrodes plumbing. Rising chloride in a well usually means road salt is reaching the aquifer.
Check your chloride 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 chloride
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 chloride
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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 chloride
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 chloride 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 |
|---|---|---|---|---|---|
| Franklin | no limit | 128 | 100% | 37.3 | 7,800 mg/L |
| Jerome | no limit | 566 | 100% | 44.9 | 127 mg/L |
| Elmore | no limit | 1,412 | 100% | 16 | 730 mg/L |
| Cassia | no limit | 687 | 100% | 49.5 | 12,000 mg/L |
| Jefferson | no limit | 916 | 100% | 15.6 | 470 mg/L |
| Gooding | no limit | 448 | 100% | 18 | 70 mg/L |
| Bear Lake | no limit | 233 | 100% | 20 | 237 mg/L |
| Clark | no limit | 149 | 100% | 6.44 | 330 mg/L |
| Bonneville | no limit | 478 | 100% | 12.3 | 280 mg/L |
| Ada | no limit | 2,090 | 100% | 7.47 | 155 mg/L |
| Gem | no limit | 420 | 100% | 3.65 | 49.4 mg/L |
| Camas | no limit | 141 | 100% | 2.4 | 12 mg/L |
| Blaine | no limit | 420 | 100% | 3.25 | 83 mg/L |
| Caribou | no limit | 502 | 100% | 20 | 335 mg/L |
| Latah | no limit | 453 | 100% | 2.1 | 100 mg/L |
- Soda Springs CCD, Caribou County100% detected of 256
- Grace CCD, Caribou County100% detected of 82
- Wayan CCD, Caribou County100% detected of 48
- Bancroft CCD, Caribou County100% detected of 116
- Montpelier CCD, Bear Lake County100% detected of 146
- Middleton CCD, Canyon County100% detected of 352
- Plummer CCD, Benewah County100% detected of 74
- Notus CCD, Canyon County100% detected of 110
- Paris CCD, Bear Lake County100% detected of 80
- Huston CCD, Canyon County100% detected of 147
- Horseshoe Bend CCD, Boise County100% detected of 58
- Arco CCD, Butte County100% detected of 2,949
- Garden Valley CCD, Boise County100% detected of 70
- West Camas CCD, Camas County100% detected of 51
- East Camas CCD, Camas County100% detected of 90
- Parma CCD, Canyon County100% detected of 241
- Caldwell CCD, Canyon County100% detected of 207
- Wilder CCD, Canyon County100% detected of 233
- Melba CCD, Canyon County100% detected of 208
- Albion CCD, Cassia County100% detected of 280
Sources
- Individual samples from the USGS Water Quality Portal and state monitoring, summarized per geography. chloride counts and shares are listed on each county and town page with their sources.