Locations and reports
Radon in Phoenix, Arizona
EPA puts Maricopa County, where Phoenix is, in Zone 2, its middle radon zone. Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
- Predicted
- Zone 2Moderate predicted potential
- Measured
17.4% of 2,393 tests reported to CDC for Maricopa County (2008 to 2017, laboratory) were at or above 4 pCi/L- Your home
- Test to knowNo area figure here is a reading of your home.
The data
Phoenix, What is published
What is published for Phoenix
Radon data is published by county, not by city
Radon data is published by county, not by city. EPA assigns radon zones to counties, and CDC publishes radon test figures by county. Neither publishes a figure for Phoenix, so every radon figure on this page belongs to a county and is labelled with it. Only a test tells you about one home.
Maricopa County has an EPA zone and its own CDC test figures, shown below. About 1,665,481 people live in Phoenix.
Phoenix, Counties
The county Phoenix lies in
MeasuredEach county's own EPA zone and its own published CDC figures for 2008 to 2017, laboratory, the newest period any of them has. A county without a figure for that period is shown without one, never with a figure from another year.
Maricopa CountyZone 2Moderate predicted potential
- 17.4%
- Reported tests at or above 4 pCi/L, 2008 to 2017, laboratory
- 1.6 pCi/L
- Median reported result
- 2,393 tests
- Tests reported to CDC
- 0
- Annual years on file
The median reported pre-mitigation result for 2008 to 2017, laboratory was 1.6 pCi/L in Maricopa County.
CDC counts radon tests that were reported to it, not homes, and figures from few tests can swing widely from year to year. Each county’s report has its full history.
Predicted: EPA Map of Radon Zones, by county. Measured: CDC tracking data, by county, 2008 to 2017, laboratory.
Radon Action Brief
National Radon Action MonthPre-sale
The radon brief for Phoenix, in one dated file.
- Your area's radon record, explained. EPA's zone and any CDC tests.
- Your plan to test this week. Which test, where it goes, how long.
- Fix costs and pros near you. Costs, EPA's checklist, listed pros.
Save 64%Sale price: $8.99Price after the sale: $25Ends Jan 31Then $25Sale ends January 31, then $25
Local help
Phoenix, Local resources
Local resources for Phoenix
Who to ask in Arizona: its radon program, test kits and professionals.
- Arizona's radon programArizona Department of Health ServicesArizona’s radon program answers questions about testing, mitigation and the rules where you live.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsAsk the program whether it has free or discounted kits, or compare kits you can buy.
- Compare kits
- Professionals in ArizonaRadon testers and mitigators in Arizona, each with how its listing was checked.
What it means
Phoenix, Questions
Questions about radon in Phoenix
What radon zone is Phoenix in?
EPA's Map of Radon Zones classifies counties, not cities. Maricopa County is in Zone 2 (moderate predicted potential). A zone is a prediction for a whole county and never tells you the level in one home.
How many radon tests come back high in Phoenix's counties?
For 2008 to 2017, laboratory, the share of radon tests reported to CDC that were at or above 4 pCi/L was 17.4% in Maricopa County (2,393 tests). Each is that county's own figure, counting tests reported to CDC, not homes. Radon411 does not average or combine them into a figure for the city.
Should I test my home in Phoenix?
Yes. Testing is the only way to know the radon level in a specific building. EPA recommends fixing a home when the radon level is 4 pCi/L or higher. EPA recommends considering a fix when the level is between 2 and 4 pCi/L. How to test a home.
The answers use the published figures of Maricopa County, the county Phoenix lies in.
Explore
Phoenix, Next steps
What to do next
What to do next: 1 of 4