Radon Mitigation in North Hopewell Township, PA
Updated
PA DEP has 9,107 home radon tests on record from the ZIP codes that cover North Hopewell Township (17322, 17356, 17363). 62.2% came back at or above the EPA's 4.0 pCi/L action level, against 52.5% for York County as a whole. That is well above the county rate, so North Hopewell Township sits among the higher-testing parts of York County. A standard system here typically costs $800 to $1,500. The only way to know about one house is to test it.
North Hopewell Township is a township in York County with about 2,742 residents and 1,116 homes, median year built 1984. Winterstown borough sits inside the township. The township was formed in 1885. 62.2% of PA DEP radon tests in its ZIP codes came back at or above the action level, above the county's 52.5%.
What the PA DEP test records show for North Hopewell Township
ZIP codes don't follow township lines, so the 3 ZIP codes below also take in some homes just outside North Hopewell Township.
| ZIP | Tests | Median pCi/L | 4+ pCi/L | 10+ | 20+ |
|---|---|---|---|---|---|
| 17322 | 952 | 7.6 | 65.2% | 43% | 26.3% |
| 17356 | 5,341 | 6.1 | 60.9% | 36.3% | 19.7% |
| 17363 | 2,814 | 6.9 | 63.8% | 40.5% | 21.4% |
| York County | 98,845 | 4.3 | 52.5% | 26.8% | 13.1% |
- ZIP 17322 (about 46% of North Hopewell Township's land): median 7.6 pCi/L across 952 tests, 26.3% at 20 or higher, top reading 445. Basement median 8.8, first floor 3.
- ZIP 17356 (about 25% of North Hopewell Township's land): median 6.1 pCi/L across 5,341 tests, 19.7% at 20 or higher, top reading 488. Basement median 7.7, first floor 1.4.
- ZIP 17363 (about 20% of North Hopewell Township's land): median 6.9 pCi/L across 2,814 tests, 21.4% at 20 or higher, top reading 333. Basement median 7.3, first floor 4.5.
The spread inside North Hopewell Township runs from 60.9% of tests high in 17356 to 65.2% in 17322.
The share that matters most is the 20+ column. 20.9% of tests here came in at 20 pCi/L or more, five times the action level. The single highest reading on record in these ZIP codes is 488 pCi/L. Neighboring houses can differ by a factor of ten, so none of this tells you what your house is. It tells you the odds are high enough that a $15 to $30 test kit is worth buying.
Tests people chose to run, not a random survey. Details on the York County radon levels page.
Basement readings versus first-floor readings
In ZIP 17322, basement tests have a median of 8.8 pCi/L, while tests taken on the first floor have a median of 3 pCi/L (72 first-floor tests). The basement number runs 2.9 times the first-floor number, which is the usual pattern: radon comes up from the soil, so it is strongest at the lowest level and gets diluted as it moves up through the house.
This matters for what you test. The PA DEP and EPA guidance is to test the lowest level you use or could use as living space. If the basement is finished, or might be someday, test it there. A finished rec room at 8.8 pCi/L is a different decision from an unfinished storage basement you rarely stand in.
Radon results by decade in ZIP 17322
| Decade tested | Tests | Median pCi/L | 4+ pCi/L |
|---|---|---|---|
| 2000s | 273 | 7.8 | 68.5% |
| 2010s | 448 | 7.2 | 63.4% |
| 2020s | 159 | 8.1 | 62.9% |
The share peaked in the 2000s at 68.5% and sits at 62.9% for tests since 2020. That is a small move, well within what you'd expect from a shifting mix of home-sale tests and retests. 159 tests have been logged in 17322 since 2020, so people here are still testing.
Housing in North Hopewell Township and what it means for a system
Census Bureau, American Community Survey 2020 to 2024:
| North Hopewell Township | York County | |
|---|---|---|
| Homes (housing units) | 1,116 | 189,857 |
| Median year built | 1984 | 1976 |
| Built before 1940 | 15.5% | 18.3% |
| Built before 1980 | 43.2% | 54.8% |
| Built 2000 or later | 24.3% | 20.6% |
| Single-family detached | 83.5% | 64.3% |
| Attached (rowhome, townhouse) | 2.4% | 17.1% |
| Mobile homes | 14.1% | 4.1% |
| Owner-occupied | 90% | 76.3% |
14.1% of homes in North Hopewell Township are mobile or manufactured homes, well above the county's 4.1%. Those sit over a crawlspace or skirted pad rather than a basement, and the fix is different: a sealed membrane over the soil with suction under it. See crawlspace radon for what that involves.
83.5% of homes in North Hopewell Township are single-family detached. A detached house with a basement is the easiest layout to mitigate: one suction point through the slab, a fan outside or in the garage, and a vent above the roof line. It is the standard sub-slab depressurization job covered step by step on our mitigation process page, and it usually lands in the middle of the cost range.
Cost-wise, a basement house here is the standard $800 to $1,500 job, while a mobile home or crawlspace house usually runs $1,500 to $3,000 because of the membrane work. Full ranges on the cost page.
Where we work in North Hopewell Township
The township was formed in 1885.
Installers must hold a PA DEP radon mitigation certification (how to check), and permit questions go to the township office at www.northhopewelltwp.com.
Common questions
Is radon a problem in North Hopewell Township?
Yes. PA DEP has 9,107 tests on record from the ZIP codes covering North Hopewell Township, and 62.2% of them came back at or above the EPA's 4.0 pCi/L action level. 20.9% were at 20 pCi/L or more. The county-wide rate is 52.5%.
What is the average radon level in ZIP 17322?
The median of 952 PA DEP tests in ZIP 17322 is 7.6 pCi/L and the mean is 21.1 pCi/L. A mean that far above the median means a long tail of very high readings, topping out at 445 pCi/L.
Nearby
Red Lion 60.9%, Cross Roads 65.2%, Felton 65.2%, New Freedom 52%, Stewartstown 63.8%. Share of PA DEP tests at or above 4.0 pCi/L, against 62.2% here.
Have a test result from North Hopewell Township?
Send us the number and the foundation type, or call and read it out.
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