Chloride in Minnesota well water
In Minnesota, chloride was detected in 97% of 19,594 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 Minnesota 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 Minnesota: 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 |
|---|---|---|---|---|---|
| Goodhue | no limit | 261 | 100% | 5.8 | 1124 mg/L |
| Kittson | no limit | 50 | 100% | 57.5 | 32,200 mg/L |
| Freeborn | no limit | 45 | 100% | 4.1 | 586 mg/L |
| Cottonwood | no limit | 86 | 100% | 6.69 | 972 mg/L |
| Big Stone | no limit | 40 | 100% | 10.3 | 626 mg/L |
| Jackson | no limit | 52 | 100% | 3.98 | 49 mg/L |
| Faribault | no limit | 51 | 100% | 11.4 | 111 mg/L |
| Douglas | no limit | 112 | 100% | 4.14 | 365 mg/L |
| Carver | no limit | 104 | 100% | 1.07 | 600 mg/L |
| Benton | no limit | 161 | 100% | 9.54 | 221 mg/L |
| Chippewa | no limit | 31 | 100% | 7.62 | 80 mg/L |
| Chisago | no limit | 192 | 100% | 5.83 | 595 mg/L |
| Grant | no limit | 58 | 100% | 8.66 | 330 mg/L |
| Clearwater | no limit | 75 | 100% | 2.7 | 180 mg/L |
| Lac qui Parle | no limit | 129 | 100% | 6.92 | 860 mg/L |
- St. Augusta, Stearns County100% detected of 30
- Wakefield township, Stearns County100% detected of 39
- Grove Park-Tilden township, Polk County100% detected of 35
- Duluth, St. Louis County100% detected of 55
- Eden Prairie, Hennepin County100% detected of 64
- St. Louis Park, Hennepin County100% detected of 185
- Minneapolis, Hennepin County100% detected of 116
- Hibbing, St. Louis County100% detected of 44
- Brooklyn Park, Hennepin County100% detected of 145
- Brooklyn Center, Hennepin County100% detected of 172
- Edina, Hennepin County100% detected of 36
- Baytown township, Washington County100% detected of 47
- Grant, Washington County100% detected of 59
- Lake Elmo, Washington County100% detected of 258
- Scandia, Washington County100% detected of 45
- Woodbury, Washington County100% detected of 182
- Fall Lake township, Lake County100% detected of 48
- Crystal, Hennepin County100% detected of 63
- May township, Washington County100% detected of 30
- Avon, Stearns County100% detected of 33
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.