Sodium in North Carolina well water
In North Carolina, sodium was detected in 100% of 3,187 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 North Carolina 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 North Carolina: 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 |
|---|---|---|---|---|---|
| Beaufort | no limit | 61 | 100% | 11 | 4,180 mg/L |
| Brunswick | no limit | 145 | 100% | 12 | 9,000 mg/L |
| Buncombe | no limit | 38 | 100% | 1.15 | 6.03 mg/L |
| Camden | no limit | 72 | 100% | 21 | 1,000 mg/L |
| Chowan | no limit | 57 | 100% | 211 | 2,880 mg/L |
| Craven | no limit | 119 | 100% | 12 | 1,330 mg/L |
| Dare | no limit | 34 | 100% | 28.5 | 5,050 mg/L |
| Duplin | no limit | 49 | 100% | 5.25 | 26 mg/L |
| Edgecombe | no limit | 63 | 100% | 4 | 93 mg/L |
| Greene | no limit | 264 | 100% | 7.33 | 88 mg/L |
| Guilford | no limit | 33 | 100% | 8 | 80 mg/L |
| Iredell | no limit | 47 | 100% | 3.93 | 15.7 mg/L |
| Johnston | no limit | 112 | 100% | 6.75 | 127 mg/L |
| Lee | no limit | 53 | 100% | 18.2 | 405 mg/L |
| Lenoir | no limit | 53 | 100% | 30 | 67.1 mg/L |
- Smithville township, Brunswick County100% detected of 55
- Avery Creek township, Buncombe County100% detected of 37
- South Mills township, Camden County100% detected of 48
- Township 6, Craven County100% detected of 62
- Township 2, Lower Conetoe, Edgecombe County100% detected of 55
- Township 15, Huntersville, Mecklenburg County100% detected of 41
- Township 1, Charlotte, Mecklenburg County100% detected of 348
- Cape Fear township, New Hanover County100% detected of 68
- Federal Point township, New Hanover County100% detected of 53
- Harnett township, New Hanover County100% detected of 89
- Ormonds township, Greene County100% detected of 223
- Olds township, Greene County100% detected of 34
- Smithfield township, Johnston County100% detected of 43
- Laurel Hill township, Scotland County100% detected of 34
- Swift Creek township, Wake County100% detected of 44
- Township 7, Pocket, Lee County100% detected of 42
- Bingham township, Orange County100% detected of 58
- Scuppernong township, Washington County100% detected of 40
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.