Sodium in Pennsylvania well water
In Pennsylvania, sodium was detected in 99% of 9,118 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 Pennsylvania 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 Pennsylvania: 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 |
|---|---|---|---|---|---|
| Delaware | no limit | 40 | 100% | 9.05 | 98 mg/L |
| Crawford | no limit | 47 | 100% | 9.77 | 22,000 mg/L |
| Allegheny | no limit | 73 | 100% | 78.4 | 3,110 mg/L |
| Adams | no limit | 79 | 100% | 9.3 | 109 mg/L |
| Beaver | no limit | 48 | 100% | 100 | 3,600 mg/L |
| Bradford | no limit | 259 | 100% | 18.1 | 2,510 mg/L |
| Bedford | no limit | 69 | 100% | 6.6 | 9,500 mg/L |
| Carbon | no limit | 56 | 100% | 12.9 | 18.2 mg/L |
| Centre | no limit | 121 | 100% | 5.8 | 100 mg/L |
| Berks | no limit | 194 | 100% | 6.35 | 303 mg/L |
| Blair | no limit | 55 | 100% | 8.2 | 312 mg/L |
| Clearfield | no limit | 494 | 100% | 6.7 | 540 mg/L |
| Clinton | no limit | 100 | 100% | 4.85 | 110 mg/L |
| Columbia | no limit | 82 | 100% | 5.2 | 500 mg/L |
| Erie | no limit | 133 | 100% | 13 | 2,900 mg/L |
- West Lampeter township, Lancaster County100% detected of 167
- East Earl township, Lancaster County100% detected of 53
- Caernarvon township, Lancaster County100% detected of 101
- Kidder township, Carbon County100% detected of 50
- Jenks township, Forest County100% detected of 30
- Tioga township, Tioga County100% detected of 31
- West Burlington township, Bradford County100% detected of 40
- Ulysses township, Potter County100% detected of 52
- New Milford township, Susquehanna County100% detected of 33
- Myerstown borough, Lebanon County100% detected of 48
- New Garden township, Chester County100% detected of 225
- Kennett township, Chester County100% detected of 36
- Charlestown township, Chester County100% detected of 48
- East Vincent township, Chester County100% detected of 35
- West Caln township, Chester County100% detected of 48
- East Brandywine township, Chester County100% detected of 36
- East Marlborough township, Chester County100% detected of 44
- East Whiteland township, Chester County100% detected of 33
- Boggs township, Clearfield County100% detected of 436
- Green township, Indiana County100% detected of 30
Sources
- Penn State Agricultural Analytical Services Lab drinking water summaries: County summaries of private water samples tested by the Penn State Agricultural Analytical Services Laboratory since 2007, published by the College of Agricultural Sciences. Counts are samples, not distinct wells. Shares are against the standard the lab prints: the EPA maximum contaminant level, or the secondary standard for iron, manganese and chloride. Lead is the first-draw result. Medians printed as 0.00 are stored as null because the lab rounds to two decimals. Retrieved September 16, 2026.
- 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.