Sodium in Maryland well water
In Maryland, sodium was detected in 100% of 5,193 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 Maryland 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 Maryland: 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 |
|---|---|---|---|---|---|
| Allegany | no limit | 48 | 100% | 9.5 | 760 mg/L |
| Anne Arundel | no limit | 374 | 100% | 2.9 | 2,600 mg/L |
| Baltimore | no limit | 571 | 100% | 13.6 | 409 mg/L |
| Baltimore | no limit | 38 | 100% | 48.5 | 3,000 mg/L |
| Calvert | no limit | 187 | 100% | 8.3 | 650 mg/L |
| Caroline | no limit | 151 | 100% | 6.1 | 278 mg/L |
| Carroll | no limit | 138 | 100% | 7.22 | 98 mg/L |
| Cecil | no limit | 169 | 100% | 9.1 | 397 mg/L |
| Charles | no limit | 317 | 100% | 66 | 424 mg/L |
| Dorchester | no limit | 156 | 100% | 38 | 14,000 mg/L |
| Frederick | no limit | 275 | 100% | 6.1 | 70 mg/L |
| Garrett | no limit | 316 | 100% | 19 | 1,800 mg/L |
| Harford | no limit | 233 | 100% | 7.1 | 101 mg/L |
| Howard | no limit | 176 | 100% | 5 | 70 mg/L |
| Kent | no limit | 304 | 100% | 4.92 | 1,700 mg/L |
- District 5, Baltimore County100% detected of 36
- District 7, Baltimore County100% detected of 41
- District 9, Baltimore County100% detected of 292
- District 8, Baltimore County100% detected of 42
- District 7, Cambridge, Dorchester County100% detected of 36
- District 7, Pomonkey, Charles County100% detected of 178
- District 6, Waldorf, Charles County100% detected of 33
- District 1, Cecilton, Cecil County100% detected of 76
- District 4, Chapel, Talbot County100% detected of 30
- District 1, Easton, Talbot County100% detected of 31
- District 8, Bay, St. Mary's County100% detected of 112
- District 1, St. Inigoes, St. Mary's County100% detected of 31
- District 3, Denton, Caroline County100% detected of 45
- District 5, Clarksville, Howard County100% detected of 88
- District 4, Lisbon, Howard County100% detected of 33
- District 3, Sunderland, Calvert County100% detected of 34
- District 1, Solomons Island, Calvert County100% detected of 83
- District 2, Prince Frederick, Calvert County100% detected of 70
- District 1, Sharpsburg, Washington County100% detected of 77
- District 11, Baltimore County100% detected of 32
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.