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New Jersey Short Term Radon Test Kit (NJ-LS) Includes Mailer & Fees

Model #: NJ-LS

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New Jersey Short Term Radon Test Kit (NJ-LS) Includes Mailer & Fees
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Category NJ Radon Test Kits

NJ State & Lab Processing fees INCLUDED. Do-it-yourself kit will include: (3) Short Term (48 to 96 hour exposure period) liquid scintillation vials, pre-addressed, postage pre-paid mailer (1 per order) & easy to follow instructions. Extremely accurate & easy to use! Quick & reliable lab results are included in price. Lab results are available online within 24-36 hours of receiving them back - click here for results. OUR LABS ARE EPA & NJ CERTIFIED.

This test kit is intended for homeowners in the state of New Jersey to perform their own test. Each kit is intended to test (1) property in accordance to New Jersey protocol.

Information from


If you do the test yourself, the process is very simple. You need only follow the testing instructions and complete the form that accompanies the test device. The device should then be mailed without delay to a laboratory using a pre-addressed envelope enclosed with the kit.

The following guidelines should be used by both homeowners and measurement companies.

For both long-term and short-term tests, the testing device must be placed:

  • in the lowest livable level of the home -- that is, the lowest level of the home that is used, or could be used, as a living space. This would include, for example, a first floor without a basement, and a finished or unfinished basement, but not a crawl space.
  • in a location where it will not be disturbed.
  • at least 20 inches from the floor, at least 4 inches away from other objects and at least 36 inches away from doors, windows or other openings to the outside. The tests only need to be placed one foot away from exterior walls that have no openings. If suspended from the ceiling, it should be in the general breathing zone.

Test kits should not be placed:

  • in areas exposed to direct sunlight, drafts, high heat, or high humidity; or
  • in kitchens, bathrooms, laundry rooms or closets.

In addition, attic and window fans, fireplaces and wood stoves (unless they are the primary heat source) should not be used for the duration of the test. They will affect air pressure in the house which will in turn affect radon concentrations. Air conditioning can be used if it circulates inside air rather than bringing in air from the outside.

For short-term tests, it is very important to maintain "closed house conditions," since ventilation can increase or decrease radon levels in unpredictable ways. This means all windows and doors that let in outside air, on all floors, must be kept closed except for normal entrances and exits. You need to maintain closed house conditions until the short-term test is finished. For tests that last less than four days, closed house conditions must be started at least 12 hours before you begin the test.


The test report will usually give your radon reading in picoCuries per liter (pCi/L). PicoCuries per liter is a measure of how much radiation is in a liter of air, which is about the size of a quart. Sometimes results will be given in Working Levels (WL). You can calculate the pCi/L level by multiplying the WL reading by 200.

The DEP and the Environmental Protection Agency (EPA) both recommend that you take action to mitigate your home if your test results indicate radon levels of 4.0 pCi/L of radon or more. If you used two or more short-term tests at the same location, the results should be averaged.

There is no truly "safe" level of radon since lung cancer can result from very low exposures to radon – however, the risk decreases as the radon concentration decreases. If your test result is less than 4.0 pCi/L, you may want to discuss with mitigation companies whether the radon level can be brought down still further. In about half of the homes that have been mitigated in New Jersey, radon levels have been brought to less than 1 pCi/L.

Radon Risk for Smokers and Nonsmokers
(Source: National Academy of Sciences, Biological Effects of Ionizing Radiation, Sixth Report, 1998)

Radon Level
(in pCi/L)

Odds for non-smokers* of developing lung cancer due to radon if exposed to this level over a lifetime

Odds for smokers* of developing lung cancer due to radon if exposed to this level over a lifetime**


1 in 27

1 in 5


1 in 68

1 in 13


1 in 135

1 in 26


1 in 270

1 in 52


1 in 1,350

1 in 260

*Smokers are defined as individuals who have smoked at least 100 cigarettes in a lifetime; non-smokers have never smoked or smoked less than 100 cigarettes in a lifetime.
**This is in addition to the risk of lung cancer from smoking itself.
***Average outdoor radon concentration.


The most common type of radon mitigation system is the sub-slab depressurization system. This system uses venting and sealing to lower radon levels in the home. A pipe is installed that runs from below the basement flooring to above the roofline, with a fan at the top that draws radon out from under the slab. Cracks and openings in the foundation are sealed. The radon is vented through the pipe to the outside, where it is quickly diluted.

The average price of such a system is around $1,200, although prices can range from $500 to $2,500, depending on characteristics of the home and the underlying soil. You can install the system yourself, if you are highly experienced in making home repairs, or you can hire a New Jersey certified radon mitigation company to do the work for you. New Jersey certified radon mitigation professionals meet specified education and experience standards and must take continuing education classes each year to maintain their certification. It is against the law for uncertified contractors to do mitigation work in New Jersey.

After your home has been mitigated, make sure the mitigator does a post-mitigation test to prove the system is working properly. In addition, you can contact the Radon Program to obtain a free post-mitigation test (you will have to provide a copy of your mitigation contract). Retesting your home every two years will tell you whether or not your system is still working effectively in reducing the radon level to below 4 pCi/L. If you believe that your system was not installed correctly, you can contact the Radon Program to arrange for a free inspection and test of the system.


Feel free to contact the DEP Radon Program if you have any questions, if you’d like a copy of the certified radon businesses lists, or if you have complaints about services provided by radon companies, through the Information Line at (800)648-0394 (within New Jersey) or (609)984-5425 (outside New Jersey) -- or you can visit the Radon Program web site at

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