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Radon Testing

EnviroHome provides radon testing in Florida for real estate transactions, pre and post mitigation testing, and diagnostics. All radon gas testing is executed by certified experts to ensure the proper technologies and proper locations are used. 

Call 888-810-2228 to learn more about the only Florida based company trusted by the Florida Department of Health to train radon professionals!

EnviroHome provides testing overseen by certified experts. Radon is a colorless, odorless and tasteless radioactive gas, it cannot be perceived by any of the five human senses. Because of this, testing by certified environmental engineers must be performed in order to verify if levels are beyond the EPA's recommended highest level of 4 pCi/L. 


If you, or your family, are experiencing negative health effects, and believe these are due to radon present in your home or property, give us a call to arrange testing of your property. 

What are the health Risks from Radon Exposure?

Mandatory Testing In Florida

The Florida Department of Health oversees all radon programs in the state of Florida. The DOH has mandated the following facility types must test for radon gas in affected counties. Please refer to the map below to view county specific requirements. 

  • All public and private schools K-12

  • State owned, operated, regulated or licensed 24 hour care facilities

    • Nursing homes, hospitals, assisted living facilities, etc.

  • State licensed day care centers

These facilities must perform radon testing within their first year of occupancy. Additionally, after 5 years, these facilities must perform radon testing again to ensure the facility has remained below the EPA"s recommended action level of 4 pCi/L. 

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Florida Radon Testing Requirements

Initial radon gas testing must be made at all of the following:

  • newly licensed or previously untested facilities

  • newly licensed or constructed buildings at existing facilities

  • a cycle of initial and follow-up testing is required when there is a change of usage for existing buildings of existing facilities

  • existing buildings at existing facilities after structural changes have been made to the buildings (even if the building was previously tested)

A minimum of 20% of the habitable ground contact and/or first floor rooms which are used or accessed by clientele must be tested in order to satisfy the testing requirement. 

How Locations are Determined 

  • Test devices must be placed in client used, occupied, or accessed habitable spaces.

  • Large rooms require at least one testing for each 2,000 square feet of habitable floor space or part thereof.

  • Test devices shall be placed away from room corners, between 2 feet and 6 feet above the floor, at least 1 foot from any wall, and at least 3 feet from windows or other potential openings in an exterior wall.

  • Test devices shall be placed away from drafts caused by sources such as heating and air conditioning vents, doors, fans, windows, and fireplaces.

  • Test devices shall remain undisturbed during the testing period.

  • Test devices shall not be placed in direct sunlight or near or on top of appliances or other devices which emit heat or moisture.

EnviroHome's Certified Measurement Services 


Typically done with short term charcoal canisters, usually 48 hours, EnviroHome can perform diagnostics on your property as the first step to discovering whether or not your home or property has elevated levels. The goal with diagnostic testing is not only to determine if your home or property has elevated levels, but to also pinpoint the cause of the elevated levels, whether that be building materials emanation or ground source radon

Pre and Post Mitigation

Before undergoing any radon mitigation, it is important to have an understanding of the nature of the issue and how widespread it may be. Pre-mitigation testing must be completed in order to design a proper mitigation project fit for the property's specific issues. With pre-mitigation testing, EnviroHome can ensure the scope of your mitigation project does not waste time or money. 

Post-mitigation testing should always be performed to ensure the mitigation was successful in lowering the radon concentration levels below the EPA recommended max of 4 pCi/L.

How Long Does It Take?

How long term testing takes depends on what stage of discovery or mitigation you are in. For real estate transactions or time sensitive situations, EnviroHome can deploy short term canisters, typically 48 hours. In order to run short term tests, the house or property must observe closed building conditions (windows and outside doors are closed during the test and for a period of time before, some air exchange systems must be disabled, severe storms or weather events should be avoided, etc.)

What are Closed Building Conditions?

If the diagnostic or short term results shows elevated levels on your property, it may be best to undergo long term testing which runs for 91+ days. With long term, seasonal weather issues, which can cause elevated results, are evened out. Additionally short term results can often be interrupted by house utilization (such as opening windows or doors) which is not an issue with long term testing. With long term, you gain a clear understanding of what levels of radon are in the home or property throughout seasonal changes. 
How Long Does Radon Testing Take?

Protocols and Quality Control Guidelines

EnviroHome's team of measurement technicians are certified by the Florida Department of Health and the National Radon proficiency Program (NRPP). Additionally, EnviroHome is the only Florida based provider of Radon Measurement training trusted by the Florida Department of Health. As certified Measurement Technicians, our team adheres to the following testing protocols and quality control guidelines. 

Placement of the radon testing devices must follow these general guidelines: ​

  • Test devices shall be placed in areas of normal air supply and shall not be shielded or covered during the testing period. A “tamper-proof” cage may be used if it has been shown not to interfere with the accuracy of the test.

  • Test devices (short-term) shall be exposed or operated in place for at least 48 hours, or longer if recommended by the device manufacturer.

  • Test devices (long-term) shall be exposed or operated in place for at least 90 days, or longer if recommended by the device manufacturer. At least thirty days of testing period shall be when the HVAC system is either heating or cooling while the building is occupied.

  • Test exposure time shall not exceed the maximum specified in the manufacturer's instructions.

Quality Control Guidelines

  • A duplicate test shall be taken for each 10 test devices to check testing precision.

  • One control blank shall be used for each 20 devices to check for potential problems occurring during shipping, storage, or processing of test devices. This quality assurance device shall be opened, then immediately resealed for the remainder of the exposure period, and processed with the other exposed test devices.

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