Radon levels in Cambria County, Pennsylvania
ModerateEPA Zone 2Predicted long-term basement average of 2.3 pCi/L (model estimate) across 34 ZIP codes - about 1.3× the US average of 1.8, close to the Pennsylvania average of 2.3. Ranked #54 of 67 Pennsylvania counties.
Test Cambria County, PA - the EPA says "consider fixing" in this range
The predicted basement average here is 2.3 pCi/L, in the 2-4 pCi/L band where the EPA recommends considering mitigation. Plenty of individual homes in a moderate area test above 4. Start with a short-term test; if it comes back at 2 or higher, follow up with a long-term test or a continuous monitor.
Monitor link goes to the Airthings store - use code RADONGRADE-10OFF at checkout for 10% off any Airthings monitor.
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.
2.3 ± 0.07
pCi/L predicted basement mean (model SD)
1.2 ± 0.07
pCi/L predicted upstairs (above-ground) mean
1.8-2.9
range of ZIP-level basement predictions in the county
Measured radon tests in Cambria County (Pennsylvania Department of Environmental Protection, 1988-2023)
Actual results from home radon tests reported to the state, separate from the model estimate above. Coverage: 1988-2026.
- Measured mean
- 6.5 pCi/L
- Measured median
- 3.4 pCi/L
- Results ≥ 4 pCi/L
- 42.1%
- Results ≥ 2 pCi/L
- 71.6%
- Basement tests, mean
- 6.7 pCi/L
- Sample
- 11,773 tests
| Figure | Model (predicted) | State tests (measured) |
|---|---|---|
| Mean, pCi/L | 2.3 basement | 6.5 (6.7 basement) |
| Share ≥ 4 pCi/L | not a model output | 42.1% |
The measured mean runs 4.1 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 Cambria County, PA and a certified mitigator will follow up - no obligation.
What this means for Cambria
The typical Cambria County home is predicted in the 2-4 pCi/L band. The EPA's guidance for this range is to consider fixing, because there is no known safe level and roughly one home in several in a moderate area will test above 4.
The 1993 EPA zone (2) and the 2001-2021 model agree for Cambria. County figures weight each ZIP by its 2010 Census population, so they describe where people live rather than empty land.
Comparable Pennsylvania counties: Washington County (2.4), Westmoreland County (2.4), Lawrence County (2.4), Somerset County (2.4). The state's highest is Lebanon County at 4.8 pCi/L.
ZIP codes in Cambria County
Predicted basement and upstairs means by ZIP (model estimate). ZIPs whose land is mostly in this county.
| ZIP | Basement | Upstairs | Grade |
|---|---|---|---|
| 15905 | 2.5 ± 0.08 | 1.3 | Moderate |
| 15904 | 2.3 ± 0.07 | 1.4 | Moderate |
| 15902 | 2.0 ± 0.05 | 1.0 | Moderate |
| 15906 | 2.1 ± 0.08 | 0.9 | Moderate |
| 15931 | 2.8 ± 0.12 | 1.3 | Moderate |
| 15946 | 2.5 ± 0.06 | 1.2 | Moderate |
| 15909 | 2.5 ± 0.07 | 1.1 | Moderate |
| 15714 | 1.8 ± 0.08 | 0.8 | Low |
| 16630 | 2.3 ± 0.05 | 1.4 | Moderate |
| 15901 | 1.8 ± 0.06 | 1.0 | Low |
| 15940 | 2.5 ± 0.06 | 1.4 | Moderate |
| 15943 | 2.1 ± 0.10 | 1.0 | Moderate |
| 16668 | 2.4 ± 0.07 | 1.3 | Moderate |
| 15956 | 2.0 ± 0.07 | 1.0 | Moderate |
| 16641 | 2.5 ± 0.07 | 1.2 | Moderate |
| 15938 | 2.6 ± 0.07 | 1.2 | Moderate |
| 16646 | 2.9 ± 0.14 | 1.3 | Moderate |
| 15955 | 2.3 ± 0.07 | 1.0 | Moderate |
| 15722 | 2.2 ± 0.09 | 1.3 | Moderate |
| 15958 | 2.5 ± 0.07 | 1.2 | Moderate |
| 15942 | 2.5 ± 0.07 | 1.3 | Moderate |
| 16613 | 2.5 ± 0.10 | 1.2 | Moderate |
| 16639 | 2.3 ± 0.07 | 1.1 | Moderate |
| 15952 | 2.3 ± 0.06 | 1.1 | Moderate |
| 15927 | 2.1 ± 0.07 | 1.0 | Moderate |
| 15762 | 2.3 ± 0.07 | 1.1 | Moderate |
| 16640 | 2.4 ± 0.05 | 1.1 | Moderate |
| 15775 | 2.1 ± 0.08 | 1.0 | Moderate |
| 16636 | 2.4 ± 0.07 | 1.3 | Moderate |
| 15773 | 2.1 ± 0.08 | 1.1 | Moderate |
| 15951 | 2.1 ± 0.07 | 0.9 | Moderate |
| 15960 | 2.1 ± 0.07 | 1.0 | Moderate |
| 15945 | 1.9 ± 0.08 | 0.9 | Low |
| 15760 | 2.0 ± 0.08 | 1.0 | Moderate |
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.
Cambria County radon questions
- Is radon high in Cambria County, Pennsylvania?
- Moderate. The model predicts a long-term basement average of 2.3 pCi/L in Cambria County (about 1.3× the US average of 1.8 and close to the Pennsylvania average of 2.3). That is in the 2-4 pCi/L range where the EPA recommends considering mitigation. Ranked 54 of 67 Pennsylvania counties.
- What do actual radon tests show in Cambria County?
- Pennsylvania Department of Environmental Protection data covering 1988-2023 (11,773 tests) shows an average of 6.5 pCi/L, a median of 3.4, 42.1% of results at or above the 4 pCi/L action level, 71.6% 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 2.3 pCi/L.
- Should I test for radon in Cambria County?
- Yes, soon. With a predicted average of 2.3 pCi/L, many homes in Cambria 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 2 mean for Cambria County?
- Zone 2 - moderate potential (2-4 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 Cambria 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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