Locations and reports
Radon Levels in Guam County, Guam
What this means for you
- Your area: EPA has no radon zone on file for Guam County.
- Local tests: CDC has published no radon test results for Guam County.
- Your home: The only way to know your home’s level is to test it.
pCi/L (picocuries per liter) is the unit radon is measured in. EPA recommends fixing a home at 4 pCi/L or above, its action level.
Predicted: EPA radon zone
No EPA zone on file
Radon411 has no EPA radon zone on file for Guam County, Guam, and it does not guess one.
This is a county-level geologic prediction. It is not a measurement of any address, and houses with elevated radon are found in all three zones.
Predicted: no EPA zone on file yet
Measured: tests reported to CDC
CDC has published no radon test figures for Guam County. Only a test tells you the level in a home.
Guam County, In figures
Guam County in figures
What the published data says about Guam County, in words. A zone and a share of tests describe an area, never the level in any one home.
Predicted
PredictedNo EPA zone is on file here for Guam County.
Reported tests and local record
CDC has no annual testing figure for Guam County on file here.
Guam County, Bordering counties
Counties bordering Guam County
Calculated by Radon411No bordering counties on file
Guam County has no county recorded as sharing a land boundary with it. Island and coastal county equivalents legitimately have none.
Guam County, Local resources
Local resources in Guam
Who to ask in Guam: the state's radon program, test kits and professionals.
Guam's radon program
Every state has a radon office that answers questions about testing and local rules. Find Guam’s on the state radon programs list.
Test kits
Ask the program whether it has free or discounted kits, or compare kits you can buy.
Radon professionals
No professionals are listed in Guam yet. The state program can point you to registered testers and mitigators.
See the Guam directoryGuam County, Questions
Questions about radon in Guam County
Common questions8 questions, answered from the figures above
Are radon levels high in Guam County?
No CDC testing statistics are published here for Guam County, Guam yet. Radon411 has no EPA zone on file for Guam County, Guam. Homes with elevated levels occur in all three zones, so the figures describe the area, not your house. Testing is the only way to know the radon level in a specific building.
How do I get a radon test in Guam County?
EPA says you can test your home yourself or hire a qualified radon test company, and that either approach takes only a small amount of time and effort. No certified tester listed on Radon411 names Guam County as a service area yet. Your state radon program is the place to ask about certified testers and any test kit offer.
How to test a homeTest kits comparedFree and low-cost kits by stateGuam radon program
Who does radon mitigation in Guam County?
Radon411 has no certified mitigators listed for Guam yet. EPA recommends having a qualified contractor fix a home with a radon problem, because lowering high radon levels takes technical knowledge and special skills, and some states require the work to be done by a licensed or certified professional. Your state radon program is the place to check whether Guam requires one.
How radon mitigation worksWhat mitigation costsGuam radon program
What EPA radon zone is Guam County in?
Radon411 has no EPA Map of Radon Zones classification on file for Guam County, Guam, so we are not going to state one. EPA's recommendation does not depend on the zone in any case: test every home.
Should I test my home in Guam County?
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.
When is the best time of year to test?
EPA says short-term tests stay in the home from 2 to 90 days and that all radon tests should run a minimum of 48 hours; long-term tests stay more than 90 days. EPA's guides do not name a best season: they say radon levels tend to vary from day to day and season to season, so a long-term test is more likely than a short-term test to tell you the year-round average.
What does it cost to test?
EPA's Citizen's Guide calls testing easy and inexpensive, and EPA's Home Buyer's and Seller's Guide says passive short-term and long-term devices are generally inexpensive, while active devices may cost more. No national average price is published for this, so Radon411 does not give one. What testing costs.
Which counties border Guam County?
No county is recorded as sharing a land boundary with Guam County.
What these figures mean if you own, buy, sell or rent
This page holds no radon measurement for Guam County, Guam yet, so there is nothing here that could stand in for testing your building.
- How to test a home
If you own your home
Test the lowest lived-in level; a short-term kit screens in days, a long-term kit reflects the year.
- Buying a house: radon guide
If you are buying
Ask for past results and any system's post-mitigation test, and test during the sale.
- Selling a house: radon guide
If you are selling
Testing before you list puts the timing in your hands; disclosure rules differ by state.
- Radon in rental homes
If you rent, or rent out a home
A tenant can test; a fix is the owner's to make, and duties differ by state.
How long a test has to run, under what conditions, and what EPA says a result means: the testing standard, in full.
Guam County, Products
Testing and mitigation products
Whatever the figures for Guam County show, only a test tells you about one home.
Testing
- Short-term test kitsPassive detectors exposed for a few days under closed-building conditions, then analyzed by a lab.
- Long-term test kitsDetectors exposed for more than 90 days, for a closer picture of the annual average.
- Continuous monitorsPowered devices that log radon on a repeating cycle, often used for transaction tests.
- Digital detectorsConsumer devices that display a running radon reading without a lab.
- Water radon testsKits for radon dissolved in well water, analyzed by a lab.
Mitigation
- Mitigation fansThe inline fan that keeps a soil depressurization system running, sized by the installer.
- System indicatorsU-tube manometers and fan alarms that show whether a mitigation system is still working.
- Sealing materialsCrack, joint and sump sealing used alongside a mitigation system, not instead of one.
Guam County / Next steps
What to do next
Learn
Know what radon is
What radon is, how it gets indoors, and why a county zone is not a reading for your home.
Learn about radonTest
Test the building you live in
Short-term or long-term, where the device goes, and closed-house conditions.
How to testFix
Bring a high level down
How a mitigation system works, and the retest that confirms it.
How mitigation worksFind a pro
Hire a certified professional
Measurement and mitigation professionals by state, with their certifications.
Find a professional
Informational. Follow EPA guidance. EPA says all radon tests should be taken for a minimum of 48 hours, with windows and doors closed from 12 hours before a short-term test.