Radon Mitigation in Manheim Township, PA
Updated
PA DEP has 5,413 home radon tests on record from the ZIP codes that cover Manheim Township (17329, 17327, 17362). 59.6% came back at or above the EPA's 4.0 pCi/L action level, against 52.5% for York County as a whole. That puts Manheim Township clearly above the county as a whole. A standard system here typically costs $800 to $1,500. The only way to know about one house is to test it.
Manheim Township is a township in York County with about 3,493 residents and 1,267 homes, median year built 1984. Codorus State Park lies within the township. 59.6% 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 Manheim Township
ZIP codes don't follow township lines, so the 3 ZIP codes below also take in some homes just outside Manheim Township.
| ZIP | Tests | Median pCi/L | 4+ pCi/L | 10+ | 20+ |
|---|---|---|---|---|---|
| 17329 | 613 | 6.9 | 61.2% | 40.6% | 27.7% |
| 17327 | 1,797 | 5.9 | 60.8% | 35.6% | 20.6% |
| 17362 | 3,003 | 5.8 | 58.6% | 38% | 22.9% |
| York County | 98,845 | 4.3 | 52.5% | 26.8% | 13.1% |
- ZIP 17329 (about 58% of Manheim Township's land): median 6.9 pCi/L across 613 tests, 27.7% at 20 or higher, top reading 455. Basement median 7.7, first floor 3.2.
- ZIP 17327 (about 25% of Manheim Township's land): median 5.9 pCi/L across 1,797 tests, 20.6% at 20 or higher, top reading 397. Basement median 6.4, first floor 3.2.
- ZIP 17362 (about 11% of Manheim Township's land): median 5.8 pCi/L across 3,003 tests, 22.9% at 20 or higher, top reading 673. Basement median 7.2, first floor 2.8.
The spread inside Manheim Township runs from 58.6% of tests high in 17362 to 61.2% in 17329.
The share that matters most is the 20+ column. 22.7% 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 673 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 17329, basement tests have a median of 7.7 pCi/L, while tests taken on the first floor have a median of 3.2 pCi/L (34 first-floor tests). The basement number runs 2.4 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.
It also explains why two neighbors can get very different results. One tested a finished basement, the other tested a first-floor bedroom. For a decision about mitigation, the test that counts is the one from the lowest level anyone spends time in.
Radon results by decade in ZIP 17329
| Decade tested | Tests | Median pCi/L | 4+ pCi/L |
|---|---|---|---|
| 2000s | 191 | 7.3 | 61.3% |
| 2010s | 230 | 6.9 | 60.4% |
| 2020s | 160 | 5.6 | 56.9% |
The share peaked in the 2000s at 61.3% and sits at 56.9% 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. 160 tests have been logged in 17329 since 2020, so people here are still testing.
Housing in Manheim Township and what it means for a system
Census Bureau, American Community Survey 2020 to 2024:
| Manheim Township | York County | |
|---|---|---|
| Homes (housing units) | 1,267 | 189,857 |
| Median year built | 1984 | 1976 |
| Built before 1940 | 20.4% | 18.3% |
| Built before 1980 | 43.7% | 54.8% |
| Built 2000 or later | 20% | 20.6% |
| Single-family detached | 93.4% | 64.3% |
| Attached (rowhome, townhouse) | 4.3% | 17.1% |
| Mobile homes | 2.4% | 4.1% |
| Owner-occupied | 94.1% | 76.3% |
93.4% of homes in Manheim 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, most houses in Manheim Township are the standard $800 to $1,500 sub-slab job, with block walls or a second suction point pushing toward $2,500. Full ranges on the cost page.
Where we work in Manheim Township
Codorus State Park lies within the township.
Installers must hold a PA DEP radon mitigation certification (how to check), and permit questions go to the township office at www.manheimtwpyorkpa.org.
Common questions
Is radon a problem in Manheim Township?
Yes. PA DEP has 5,413 tests on record from the ZIP codes covering Manheim Township, and 59.6% of them came back at or above the EPA's 4.0 pCi/L action level. 22.7% were at 20 pCi/L or more. The county-wide rate is 52.5%.
What is the average radon level in ZIP 17329?
The median of 613 PA DEP tests in ZIP 17329 is 6.9 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 455 pCi/L.
Nearby
Hanover 47%, Glen Rock 60.8%, Heidelberg Township 49.4%, Spring Grove 58.6%, West Manheim Township 47%. Share of PA DEP tests at or above 4.0 pCi/L, against 59.6% here.
Have a test result from Manheim Township?
Send us the number and the foundation type, or call and read it out.
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