Radon levels in Lebanon County, Pennsylvania
HighEPA Zone 1Predicted long-term basement average of 4.8 pCi/L (model estimate) across 9 ZIP codes - about 2.7× the US average of 1.8, about 2.1× the Pennsylvania average of 2.3. Ranked #1 of 67 Pennsylvania counties.
Test Lebanon County, PA now - and consider a continuous monitor
The model predicts a long-term basement average of 4.8 pCi/L here, at or above the EPA action level of 4. Homes in the same ZIP still vary widely, so a real test is the only way to know your number. A continuous digital monitor shows how your level swings with weather and season, which matters when you're near the action level.
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Already tested at 4 pCi/L or higher? Find a certified mitigation professional (EPA). A mitigation system typically runs $800-$2,500 installed.
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Predicted (model estimate). The pCi/L figures on this page are long-term area averages from a peer-reviewed national model built on millions of real radon tests (2001-2021). They describe the typical home in this area - not your home, which can be several times higher or lower. The EPA radon zone is a separate, 1993 county-level classification. Measured state test results are shown separately below, labeled with their source and years. How the numbers work.
4.8 ± 0.09
pCi/L predicted basement mean (model SD)
2.5 ± 0.07
pCi/L predicted upstairs (above-ground) mean
3.3-5.9
range of ZIP-level basement predictions in the county
Measured radon tests in Lebanon County (Pennsylvania Department of Environmental Protection, 1989-2025)
Actual results from home radon tests reported to the state, separate from the model estimate above. Coverage: 1988-2026.
- Measured mean
- 13.8 pCi/L
- Measured median
- 6.9 pCi/L
- Results ≥ 4 pCi/L
- 64.4%
- Results ≥ 2 pCi/L
- 79.3%
- Basement tests, mean
- 15.1 pCi/L
- Sample
- 10,682 tests
| Figure | Model (predicted) | State tests (measured) |
|---|---|---|
| Mean, pCi/L | 4.8 basement | 13.8 (15.1 basement) |
| Share ≥ 4 pCi/L | not a model output | 64.4% |
The measured mean runs 9.0 pCi/L above the model because state test data is voluntary and skews toward basements, winter, and homeowners who already suspected a problem, while the model estimates the long-term average across all homes.
Source: Radon Test Results September 1986 - Current Annual County Environmental Protection, Pennsylvania Department of Environmental Protection, Bureau of Radiation Protection. Public Domain (as stated on data.pa.gov). Method and download.
Tested above 4 pCi/L? Get a mitigation quote from a certified local contractor
Typical mitigation runs $800-$2,500 and takes a day. Installers guarantee the system brings levels under 4 pCi/L. Tell us where you are in Lebanon County, PA and a certified mitigator will follow up - no obligation.
What this means for Lebanon
The typical home in Lebanon County is predicted to sit at or above the EPA action level of 4 pCi/L in the basement. In practice that means a large share of houses here would qualify for mitigation if tested, and buyers routinely ask for radon tests in Pennsylvania transactions.
The 1993 EPA zone (1) and the 2001-2021 model agree for Lebanon. County figures weight each ZIP by its 2010 Census population, so they describe where people live rather than empty land.
Comparable Pennsylvania counties: Centre County (4.2), Franklin County (4.0), Cumberland County (3.9), Snyder County (3.8).
ZIP codes in Lebanon County
Predicted basement and upstairs means by ZIP (model estimate). ZIPs whose land is mostly in this county.
If your test comes back at 4 pCi/L or higher
Mitigation is a routine job: a fan-driven pipe that vents soil gas from under the slab to above the roofline, typically $800-$2,500 installed (typical range; local quotes vary). Use certified professionals: EPA find-a-professional. Read the full mitigation guide.
Lebanon County radon questions
- Is radon high in Lebanon County, Pennsylvania?
- High. The model predicts a long-term basement average of 4.8 pCi/L in Lebanon County (about 2.7× the US average of 1.8 and about 2.1× the Pennsylvania average of 2.3). That is at or above the EPA action level of 4 pCi/L, so the typical home here would qualify for mitigation. Ranked 1 of 67 Pennsylvania counties.
- What do actual radon tests show in Lebanon County?
- Pennsylvania Department of Environmental Protection data covering 1989-2025 (10,682 tests) shows an average of 13.8 pCi/L, a median of 6.9, 64.4% of results at or above the 4 pCi/L action level, 79.3% at or above 2. These are voluntary home tests, so they skew toward basements and toward homes where radon was suspected; the model's predicted long-term basement average for the county is 4.8 pCi/L.
- Should I test for radon in Lebanon County?
- Yes, soon. With a predicted average of 4.8 pCi/L and at least one ZIP predicted at 5.9, many homes in Lebanon County will test above the 4 pCi/L action level. Use a short-term kit first; if it reads 2 or higher, confirm with a long-term test or continuous monitor before deciding on mitigation.
- What does EPA Radon Zone 1 mean for Lebanon County?
- Zone 1 - highest potential (predicted average > 4 pCi/L). The zone map dates from 1993 and classifies whole counties. The 2001-2021 model agrees with the zone here. Neither replaces a test of your own home.
- How much does radon mitigation cost in Lebanon County?
- A standard active sub-slab depressurization system typically runs $800-$2,500 installed nationally; Pennsylvania quotes vary with foundation type (slab, crawlspace, basement), home size and local labor. Get two or three bids from certified mitigators listed by your state radon program or the EPA's find-a-professional page.
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