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Radon testing has become common in Real Estate transactions in the Naples and Fort Myers area.  When we began performing radon tests in 1999, if a company performed 6 tests a month you were "busy". Since then the numbers have grown, we have performed over 23,000 radon tests.  Many homes / condos have been purchased as investments and the wise investor has ordered a radon test.  Many condos whether 2 story structure or 27 story high rises have elevated radon levels.  In fact the last few high rises build in the Naples - Bonita Springs area had fresh air systems installed during construction partly to reduce radon levels.  Single family homes don't seem to have elevated radon levels near as much as condos do. 

Please contact our office to schedule:
Radon Tests / Mold Assessments (inspections) & Sampling
Formaldehyde & VOC Tests / Allergen Screening
John Cosgrove, CIE, Inc.
Radon & Mold Professionals II
188 1st Street, Bonita Springs, FL 34134
(239) 948-9717


The most radon monitors in Naples, FL
Radalink radon monitor

Your Naples, Bonita Springs, Marco Island or Ft Myers radon test must be performed by someone certified by the Florida DOH if you are paying them.

Most radon tests for Real Estate transaction in Collier and Lee Counties are performed using a continuous radon monitor (CRM) with the report giving you hour by hour readings of the radon level, barometric pressure, temperature and humidity.  This type of report helps determine if the home remained in "closed house conditions" during the test as required by the FL DOH and EPA.

During the recession a few years ago many home inspectors became FL DOH certified to place and pickup radon tests in the need to supplement lost income.  Some of these inspectors use a passive radon test similar to what we use to test schools and assisted - living facilities.  A passive radon test only provides the client with one number, the average radon level during the test which is normally 48 hours.  A passive test can be carried outdoors during the test or doors and windows can be left open skewing the test results and no one would know. This is a good test (AIR CHEK - radon.com - best),  inexpensive but can be "tampered with" and you wouldn't know. 

Common long term radon tests




 Radon tests can be long term (90 days to 12 months) or short term (usually 2 to 4days).   Short term radon tests require "closed house" conditions, doors and windows kept closed, brief entrance and exits allowed.  Long term radon tests allow you to have doors and windows open as you normally live.  Since radon levels fluctuate  up and down, the longer the test the more conclusive the results.   Homes typically have a lower air pressure than outdoors (negative pressure) causing radon gas, mold spores, pollen etc to be "sucked" into the home.   Having doors and windows open lowers the radon level inside the home / air pressure equals the outdoors preventing the "sucking in".

Radon tests must be performed (placed & PICKED up) by a person certified to do so by the Florida Department of Health and the report must come from a FLDOH certified Radon Measurement Business

The Radon Test for you the Homeowner or Homebuyer

We perform radon testing in Southwest Florida for residential real estate. We also perform radon testing state-wide for schools, assisted living,& multi living complexes  We are FL DOH certified Radon measurement technicians and a FLDOH Certified Radon Measurement Business with over 30 monitors to meet your testing needs.

The most radon monitors in Naples, FL
femto tech radon monitors

 Year after year we perform more radon tests for residential Real estate than anyone in South Florida.

"The only way to know is to Test" "Elevated radon levels have even been found on upper floors of High Rises in Collier & Lee"

Radon Tests start at $160.oo

What is radon?

Radon is a radioactive gas that has been found in homes all over the United States. It comes from the natural breakdown of uranium in soil, rock and water and gets into the air you breathe. Radon typically moves up through the ground to the air above and into your home through cracks and other holes in the foundation.

Any home can have a radon problem. This means new and old homes, well-sealed and drafty homes, and homes with or without basements. In fact, you and your family are most likely to get your greatest radiation exposure at home. That is where you spend most of your time.

How do I know if there is radon in my home?
You cannot see, feel, smell, or taste radon. Testing your home is the only way to know if you and your family are at risk from radon. The EPA and the Surgeon General recommend testing for radon in all homes. The EPA also recommends testing in schools.
You cannot predict radon levels based on state, local, and neighborhood radon measurements. Do not rely on radon test results taken in other homes in the neighborhood to estimate the radon level in your home. Homes which are next to each other can have different radon levels. Testing is the only way to find out what your home's radon level is.
What can I do to protect myself and my family from radon?

The first step is to test your home for radon, and have it fixed if it is at or above EPA's Action Level of 4 picocuries per liter.
How can radon affect people's health?
Almost all risk from radon comes from breathing air with radon and its decay products. Radon decay products cause lung cancer. The health risk of ingesting radon, in water for example, is dwarfed by the risk of inhaling radon and its decay products. They occur in indoor air or with tobacco smoke. Alpha radiation directly causes damage to sensitive lung tissue. Most of the radiation dose is not actually from radon itself, though, which is mostly exhaled. It comes from radon's chain of short-lived solid decay products that are inhaled and lodge in the airways of the lungs.
What does radon do once it gets into the body?

Most of the radon gas that you inhale is also exhaled. However, some of radon's decay products attach to dusts and aerosols in the air and are then readily deposited in the lungs. Some of these are cleared by the lung's natural defense system, and swallowed or coughed out. Those particles that are retained long enough release radiation damaging surrounding lung tissues. A small amount of radon decay products in the lung are absorbed into the blood.

U.S. Surgeon General Health Advisory

"Indoor radon gas is the second-leading cause of lung cancer in the United States and breathing it over prolonged periods can present a significant health risk to families all over the country. It's important to know that this threat is completely preventable. Radon can be detected with a simple test and fixed through well-established venting techniques." January 2005

Naples Daily News article December 1, 2003
"In Lee and Collier Counties,about one out of four of homes ... tested had elevated radon levels."

"All Florida home sales contracts are required to include a paragraph informing the buyer that elevated radon levels have been found in Florida homes."

"Radon is the second leading cause of lung cancer after cigarette smoking, killing about 21,000 Americans every year." Environmental Protection Agency

FL DOH "750 Floridians a year die of radon exposure"
Sun Sentinel, South Florida, 11-21-2004



We bring our own table and place the monitor in the best location. We do not put our equipment on the homeowner's furniture.


We perform 2 tests at once, we use a passive charcoal test as a quality control test with every monitor. The charcoal test is the same type we use in schools and assisted living facilities, where we have hundreds of rooms to test.


We always leave a copy of the EPA's Homebuyers & Sellers Guide to Radon with every radon test as required.


We use the Femto-Tech monitor, it is a $4,500 monitor (we do not use the inexpensive monitors such as sun nuclear monitor,  used by many home inspectors)

This unit records climate measurements.

This is very important, it alerts you if someone accidently left a door or window open during the test.

Climate measurements tell us about the conditions while the test is being performed and discourages tampering with closed home conditions.


Florida Adminstrative Code: 64E-5.1203 General Provisions  (1)

"Beginning January 1, 1989, no person may test for or mitigate the presence of radon in Florida for a fee or other renumeration unless such person has been certified."


Collier and Lee County requires radon testers to have an occupational license for the county the test is in. The Counties had 5 people listed with an occupational license for radon testing last year.


The County occupational license office says:

"You cannot get an occupational license for radon testing unless you are certified by the FL DOH to test."


The person placing and / or picking up a radon test must be FL DOH certified and have an occupational license for radon testing (occupational license for home inspections does not qualify). 

Associated Radon Services
Bill Levy
(561) 219-4334
Central Florida

Radon Evaluations, Inc.   for radon tests in

Sarasota, Hillsboro, Pasco, Marion, Polk, Alachua, Brevard, Seminole, Orange, & St Pete Counties1 (888) 621-8622


Certified mold inspection, assessment and testing in Naples, Bonita Springs, Estero, Ft. Myers, Fort myers, Cape Coral, Lehigh Acres, Collier County, Lee County. Certified by the American Indoor Air Quality Council (AmIAQ) and Envirnomental Solutions Association (ESA)
Certified radon testing in Naples, Bonita Springs, Estero, Ft. Myers, Fort myers, Cape Coral, Lehigh Acres, Collier County, Lee County. Certified by the Florida Department of Health (FL DOH)

Web www.epa.gov
www.doh.state.fl.us www.radonmoldhelp.com

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