Sodium in Illinois well water
In Illinois, sodium was detected in 100% of 6,462 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 Illinois 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 Illinois: 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 |
|---|---|---|---|---|---|
| Boone | no limit | 66 | 100% | 7.55 | 53 mg/L |
| Adams | no limit | 41 | 100% | 10 | 248 mg/L |
| Carroll | no limit | 30 | 100% | 4.6 | 162 mg/L |
| Champaign | no limit | 150 | 100% | 28 | 125 mg/L |
| Bureau | no limit | 298 | 100% | 18 | 375 mg/L |
| Cook | no limit | 691 | 100% | 50 | 4,840 mg/L |
| DeKalb | no limit | 76 | 100% | 15.3 | 86 mg/L |
| De Witt | no limit | 93 | 100% | 93.7 | 203 mg/L |
| DuPage | no limit | 433 | 100% | 43 | 620 mg/L |
| Fulton | no limit | 324 | 100% | 240 | 1,200 mg/L |
| Christian | no limit | 37 | 100% | 20 | 86 mg/L |
| Henry | no limit | 84 | 100% | 53 | 583 mg/L |
| Iroquois | no limit | 59 | 100% | 56 | 120 mg/L |
| Jo Daviess | no limit | 38 | 100% | 3 | 85 mg/L |
| Kane | no limit | 384 | 100% | 30 | 523 mg/L |
- Joliet township, Will County100% detected of 70
- Lockport township, Will County100% detected of 47
- Homer township, Will County100% detected of 33
- Libertyville township, Lake County100% detected of 30
- Fremont township, Lake County100% detected of 32
- Warren township, Lake County100% detected of 33
- Ela township, Lake County100% detected of 54
- Zion township, Lake County100% detected of 32
- Avon township, Lake County100% detected of 51
- Bloomingdale township, DuPage County100% detected of 32
- Addison township, DuPage County100% detected of 51
- Downers Grove township, DuPage County100% detected of 67
- Lisle township, DuPage County100% detected of 38
- Milton township, DuPage County100% detected of 41
- York township, DuPage County100% detected of 119
- Chicago, Cook County100% detected of 74
- Wheeling township, Cook County100% detected of 103
- Hanover township, Cook County100% detected of 42
- Lyons township, Cook County100% detected of 38
- Quiver township, Mason County100% detected of 36
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.