Chloride in Iowa well water
In Iowa, chloride was detected in 95% of 13,318 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 Iowa 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 Iowa: 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 |
|---|---|---|---|---|---|
| Taylor | no limit | 37 | 100% | 90 | 1,420 mg/L |
| Wayne | no limit | 34 | 100% | 48 | 760 mg/L |
| Mills | no limit | 75 | 100% | 14 | 435 mg/L |
| Shelby | no limit | 120 | 100% | 18 | 150 mg/L |
| O'Brien | no limit | 208 | 100% | 14 | 82 mg/L |
| Wapello | no limit | 132 | 100% | 58 | 13,800 mg/L |
| Audubon | no limit | 105 | 100% | 13 | 150 mg/L |
| Madison | no limit | 31 | 100% | 33 | 825 mg/L |
| Fremont | no limit | 76 | 100% | 12 | 11,200 mg/L |
| Lyon | no limit | 154 | 100% | 16.5 | 130 mg/L |
| Boone | no limit | 82 | 100% | 28 | 98 mg/L |
| Monroe | no limit | 44 | 100% | 12.5 | 690 mg/L |
| Decatur | no limit | 48 | 100% | 201 | 1,420 mg/L |
| Page | no limit | 66 | 100% | 29 | 94,300 mg/L |
| Winneshiek | no limit | 129 | 100% | 8.5 | 38 mg/L |
- Benton township, Lucas County100% detected of 31
- Leroy township, Audubon County100% detected of 59
- Jefferson, Greene County100% detected of 30
- Lafayette township, Keokuk County100% detected of 38
- Riverside township, Lyon County100% detected of 34
- Washington township, Jasper County100% detected of 40
- Washington township, Buchanan County100% detected of 32
- Larchwood township, Lyon County100% detected of 30
- Richland township, Sac County100% detected of 32
- Viola township, Sac County100% detected of 35
- Delaware township, Delaware County100% detected of 54
- Sheffield, Franklin County100% detected of 33
- Pleasant township, Hardin County100% detected of 160
- Valley township, Guthrie County100% detected of 32
- Remsen township, Plymouth County100% detected of 37
- Madison township, Lee County100% detected of 39
- Hayes township, Buena Vista County100% detected of 36
- West Bend township, Palo Alto County100% detected of 30
- Morgan township, Harrison County100% detected of 38
- Exira township, Audubon County100% detected of 35
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.