Data hub
Pennsylvania Radon Data
Pennsylvania publishes summaries of radon test results reported by certified testers. Used well, that data describes testing activity across the Commonwealth. Used badly, it becomes a false prediction about a specific house.
The most important limitation, first
ZIP and county data cannot predict your home
Historical radon test data for a ZIP code or county cannot predict the radon level in an individual home. Testing the individual property is the only way to know its radon level. Neighbouring homes routinely produce very different results, because the result depends on that building's foundation, construction and operation.No live data connection on this site
When a verified dataset is imported, this page will present the fields that actually exist in it, together with the dataset's own source and update date.
What Pennsylvania's radon data generally contains
Reported radon test data in Pennsylvania originates with certified testers, who report results to the Commonwealth. Summaries built from that reporting typically organize results geographically and describe the tests that were submitted.
| Field type | What it describes | What it does not describe |
|---|---|---|
| Geography (ZIP, county) | Where reported tests were performed. | The level in any particular building. |
| Number of tests | How much testing has been reported in that area. | How representative that sample is of the housing stock. |
| Testing period | The span of time the summary covers. | Current conditions in any individual home. |
| Test-location categories | Where in buildings tests were placed, where recorded. | Whether placement followed protocol in each case. |
| Summary statistics | Central tendency or distribution of reported results, where published. | A prediction for an untested address. |
| Source and update date | Provenance of the summary. | Nothing about your building. |
Field availability varies with the published dataset. Only fields actually present in the official data should ever be displayed as data.
Why reported data is a biased sample
Reported test data reflects where testing happened, not where radon is. Testing volume rises with real-estate activity, local awareness and the presence of active testing professionals. An area with few reported tests is not a low-radon area — it is an under-tested one.
Areas with a high share of elevated results may also reflect a testing population skewed toward transactions and follow-up measurements. That is a reason to read the data as context, not as a forecast.
Reasonable uses of the data
- Understanding how much radon testing has been reported in a region.
- Supporting a public-awareness or policy discussion.
- Giving a homeowner context for why testing is routinely recommended.
- Comparing testing activity over time where the dataset supports it.
And one unreasonable use: deciding not to test because an area's numbers looked low.
County navigation
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Lebanon County
If you want a number for your address
There is only one way to get it: test the building. Testing guidance explains how to produce a result you can act on, and the result guide explains what to do with it.
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