County Radon Context & Test Reader
Look up the selected state and county in the official EPA text dataset.
Your us radon context inputs
County zones describe regional potential, not a prediction for an individual home.
US radon context report
2.5 pCi/L · entered home measurement
Autauga County, Alabama · EPA map zone 2 (202406 edition)
Full result table
| Context | Value |
|---|---|
| Measured sample | 2.5 pCi/L |
| Same measurement | 92.5 Bq/m³ |
| County potential zone (not home measurement) | 2 |
| EPA map edition | 202,406 |
County zones describe regional potential, not a prediction for an individual home. All zones can contain homes with elevated readings. The entered property result and testing protocol remain separate from map context; no building is certified safe.
Let’s work it out.
Ask about this tool, enter your values, or understand your result.
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How to use County Radon Context & Test Reader
- Look up the selected state and county in the official EPA text dataset.
- The worksheet converts a supplied radon reading between pCi/L and Bq/m³ using the exact activity-unit relationship.
- A county zone summarises a broad regional potential.
Worked example
An entered 2.5 pCi/L equals 92.5 Bq/m³. Autauga County, Alabama is zone 2 in the bundled EPA source file.
Formula, accuracy & limitations
Exact unit conversion: 1 pCi/L = 37 Bq/m³. Match the selected state and county against the bundled EPA county dataset (source file edition 202406). Show county zone separately from the entered property measurement.
County zones describe regional potential, not a prediction for an individual home. All zones can contain homes with elevated readings. The entered property result and testing protocol remain separate from map context; no building is certified safe.
The primary result is rounded to two decimal places. Calculation tables show up to four and supporting metrics up to six. Very small nonzero values use scientific notation. Display rounding is not fed back into the arithmetic.
Official source and method context ↗Find county context without guessing a city zone
Look up the selected state and county in the official EPA text dataset. The lookup uses the source’s county definitions, so a city name is not silently substituted. The report identifies the dataset edition and keeps regional context separate from any measurement in your own building.
Enter the actual test unit
The worksheet converts a supplied radon reading between pCi/L and Bq/m³ using the exact activity-unit relationship. That conversion does not change sampling conditions or turn a short-term result into a long-term average. Check the test report and collection instructions when recording the value.
Read the map as regional potential
A county zone summarises a broad regional potential. It cannot establish the radon concentration in one room or building, and low-potential zones can still contain elevated homes. The result therefore avoids a green pass badge based on the county and links directly to EPA testing information.
Keep the source version visible
The bundled file is identified by its 202406 source filename and is not presented as a live property survey. County boundaries and local information can change. Use current state and local resources alongside a properly performed test, rather than inferring that a cached map replaces a measurement.
Frequently asked questions
Does a zone tell me whether my home needs testing?
County context is not an individual test result. EPA recommends home testing regardless of zone.
Why is my city not accepted as a county?
The source is county-based. Enter the corresponding county and state instead of an unrelated city label.
Is the unit conversion an estimate?
The conversion uses 37 Bq/m³ per pCi/L; the underlying measurement still has its own uncertainty.
Is the dataset live?
The bundled source edition is shown. It is a regional map dataset, not a real-time building measurement.
