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NJDEP-Bureau of Environmental Radiation


Radon Mitigation Businesses Certified in New Jersey

The following information should be considered before remedial action is taken to lower elevated radon gas concentrations in your home, business, school or day care center.  We also recommend reading the New Jersey Department of Environmental Protection (DEP) publication, RADON TESTING AND MITIGATION: THE BASICS.  The information in the publication should help you decide what type of mitigation system is needed and may assist you in evaluating proposals from contractors.

The radon mitigation businesses listed have been certified by the DEP and issued a certification number that you should ask for when acquiring a business' services.  Individuals are also issued certification numbers; however, not all the workers installing a system need to have one.  There should be at least one person present for the duration of the job with a DEP certification number; he/she will be either a certified Mitigation Specialist or a certified Mitigation Technician.  You should ask to see his/her certificate.  Please contact the Radon Section to verify the certification number of the business and individual you hire.

As of May 13, 1991 no one may test or mitigate for radon unless they are certified by the DEP.

If you have a complaint about any business or individual providing you with radon mitigation services, please write to the Radon Section at Mail Code 25-01 PO Box 420, Trenton, NJ 08625-0420 or call toll-free within New Jersey at (800) 648-0394 or outside New Jersey at (609) 984-5425.

Selecting a Mitigation Business:

  1. Inquire whether the contractor has the necessary insurance and liability coverage to protect you in the event of an accident.
  2. Obtain three or more bids for the same job involving exactly the same specifications.  Usually these estimates are free of charge.

Once the contractor has been chosen, have a set of questions ready regarding the mitigation specifications, cost schedules and pre- and post-mitigation testing.  The post-mitigation test must be conducted by a certified radon measurement business with a certification number.  Individuals performing radon testing must also have a DEP certification number which will be different than the business' number.  The mitigation business you hire may also have a measurement business certification and/or may have on staff a certified radon Measurement Specialist or Measurement Technician.  If not, the business should not participate in radon testing or give you instructions regarding radon testing.

Before Signing the Contract:

  1. Be sure that the contract describes the work in detail.
  2. Be surethat it specifies the quantity, quality, types, brands and models of materials and products.
  3. If a warranty is given, insist that it be included in the contract body rather than as an attachment.
  4. Make certain that the contract contains any and all oral promises made by the contractor.
  5. Do not provide a down payment in cash, especially if it involves a large sum of money.
  6. Thecontract should specify who is responsible for obtaining the necessary building code permits, fees and/or licenses.
  7. The contract should include a provision for radon testing after mitigation, to be paid for as part of the contract.
  8. A radon test should have been conducted before mitigation, but if the test was not recent (up to six weeks prior to mitigation work), the mitigator may request that another radon test be conducted.

After Mitigation:

  1. Post-mitigation radon testing must be conducted in order to determine the effectiveness of the system.  The result of that test should be below 4 pCi/L.
  2. After the remediation work and the business' post-test has been completed, call the Radon Section at (800) 648-0394 to arrange for free post-mitigation testing.
  3. If you have any legal questions about your mitigation contract, consult an attorney. 

Diagnostic Tests:

Diagnostic tests are conducted to help design appropriate radon mitigation systems. Consumers should be aware that these test results are for the business' use only and are not reported to customers. These tests are usually conducted by the mitigation business and are included in the price of the quoted system. Some businesses charge extra for this service. Therefore, consumers are advised to ask their contractor if the testing to be conducted is for diagnostic purposes and if there is an additional charge for this service.

List of Radon Mitigation Businesses Certified in New Jersey

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Last Updated: January 12, 2012