Wrightsville is a high reading area
Wrightsville averages 17.54 pCi/L, which places it in the top handful of York County areas alongside Spring Grove at 17.51, Seven Valleys at 17.59 and Windsor at 17.72. That is more than four times the EPA action level as a typical reading, not an outlier.
Of the 1,351 recorded tests, 56.9 percent reach or exceed 4 pCi/L. Put the other way, an untested Wrightsville house is more likely than not to need work.
The borough sits on the western bank of the Susquehanna, and the readings around it vary sharply: Wrightsville at 17.54 against York Haven, also on the river a few miles north, at 6.21. Proximity to the water explains neither, which is a useful reminder that the rock underneath matters more than the landscape on top of it.
The eastern edge of the county runs high
Wrightsville is not an outlier either. The eastern side of York County reads consistently high, and the levels fall steadily as you move west toward the city.
| Area | ZIP | Tests | Average |
|---|---|---|---|
| Windsor | 17366 | 864 | 17.81 |
| Wrightsville | 17368 | 1,351 | 17.54 |
| Dallastown | 17313 | 2,420 | 15.57 |
| Red Lion | 17356 | 5,341 | 13.82 |
| York (northeast) | 17406 | 4,025 | 11.40 |
| York (southeast) | 17402 | 10,722 | 10.50 |
Windsor, a few miles south, is the highest of the group at 17.81. From there the gradient runs downhill through Dallastown and Red Lion into the York suburbs, where 17402 averages 10.50.
That gradient is worth knowing if you are comparing quotes or results with someone in York itself. A reading that would be unusual in the suburbs is ordinary here, and a contractor who works mostly on the western side of the county may be quoting from a different distribution than the one your house sits in.
What mitigation costs here, with a caveat
Eleven systems were installed in Wrightsville between 2024 and 2026, at a median of 1,489 dollars and an average of 1,546. Both run above the county median of 1,150.
There is a plausible reason for a genuine difference. Wrightsville's building stock includes a good deal of older river town housing with stone foundations, and a stone foundation is one of the factors that genuinely raises a radon mitigation price. What does not raise it is your reading: across York County, houses testing above 30 pCi/L averaged 1,269 dollars against 1,169 for those under 4.
What a high area changes, and what it does not
A 17.54 average does not mean your house reads 17.54. Individual results within any York County town span a wide range, because radon entry depends on the cracks in one particular slab and how one particular house is heated.
What it does change is the prior. In a borough where more than half of tests exceed the action level, an untested house is a genuinely open question rather than a formality, and testing moves from prudent to overdue.
The reassuring half of the record: mitigation works as well here as anywhere. Across York County installations with a reading before and after, levels fell by 92 percent on average and 97 percent of houses finished below the action level, including plenty that started far higher than 17.
Common questions about radon in Wrightsville
What is the average radon level in Wrightsville, PA?
Wrightsville averages 17.54 pCi/L across 1,351 recorded tests, against 10.75 for York County and 6.00 for Pennsylvania. Some 56.9 percent of tests reach or exceed the action level.
Why is radon so high in Wrightsville?
The rock underneath, rather than anything on the surface. York Haven sits on the same river a few miles north and averages 6.21, so proximity to the Susquehanna explains neither figure.
How much does radon mitigation cost in Wrightsville?
Eleven systems since 2024 came in at a median of 1,489 dollars, above the county median of 1,150. Eleven is a small sample, so use the county wide figure from 986 installations as the benchmark.
Does a high reading mean a higher bill?
Barely. Across York County, houses testing above 30 pCi/L averaged 1,269 dollars against 1,169 for those under 4. The crew builds the same system either way, so a high reading affects urgency rather than price.