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Radon professionals in New Jersey

Who tests and fixes radon in New Jersey, what New Jersey's own program says about licensing, and how to check a credential before you hire.

Updated October 2, 2026

Short answer

Radon professionals in New Jersey, in brief

No business that New Jersey itself licenses or certifies is listed on Radon411 yet. New Jersey's radon program says the state licenses or certifies radon professionals.

45 businesses with an address in New Jersey appear in a separate list because another state's registry lists them. That does not mean New Jersey licenses them.

The rule

Does New Jersey license radon professionals?

Yes. New Jersey's radon program page, checked on September 25, 2026, says:

By law, all businesses and professionals conducting radon testing and mitigation in New Jersey must be certified by the DEP.
Radon Section, read September 25, 2026

EPA's state contacts page lists New Jersey among the states with radon credentialing programs. Licensing is done by the state, not by the national programs, and EPA requires states that receive radon grants to give the public a list of only those providers credentialed by the state or by NRPP or NRSB.

New Jersey does not publish a list of licensed radon professionals that Radon411 can read, so the state's own search is the complete source.

State program

New Jersey's radon program

The state's own radon program: the place to ask who may work in the state.

Radon Section

New Jersey Department of Environmental Protection

Its page covers free or discounted test kits, who may test and fix radon in the state and the disclosure rule for home sales.

Phone 800-648-0394

Visit the program's page (opens in a new tab)Read September 25, 2026

The directory

Radon professionals listed for New Jersey

None that New Jersey licenses yet. The businesses below have an address here and another state licenses them.

By city

The 12 of 13 New Jersey cities with the most listings. Search for any other.

No business licensed by New Jersey is listed here yet. Where New Jersey licenses radon professionals, its own list is the complete one.

Located in New Jersey, licensed by another state

These businesses have an address in New Jersey, and another state's registry lists them. That does not mean New Jersey licenses them: check with New Jersey's radon program before hiring one for work here.

45 professionals located in New Jersey and listed by another state. Showing 1 to 1224.

On this page: 3 testing and mitigation, 1 mitigation, 820 testing

Testing and mitigation (3)

Mitigation (1)

Testing (820)

Show 12 more on this page

Nearby

Listed professionals in states next to New Jersey

A business licensed in a neighboring state is licensed there, not necessarily in New Jersey. Check New Jersey's rule above before you hire one.

Before you hire

How to check a credential in New Jersey

  1. New Jersey's own list

    Start with the New Jersey Department of Environmental Protection. Licensing is done by the state, so its list or search says who may legally work in New Jersey.

  2. NRPP's search

    The National Radon Proficiency Program's search finds its Certified Mitigation Specialists and Certified Measurement Professionals by area, by name, or by the 6-digit NRPP ID number a professional can give you.

  3. NRSB's search

    The National Radon Safety Board's search finds a professional in your area, or confirms that a named professional is NRSB certified.

  4. The ID card

    The programs usually issue a photo ID card showing the holder's qualifications and its expiry date. Ask to see it, and if in doubt, check with the body that issued it.

Hiring

Hiring in New Jersey

A tester

Ask for the credential and ID card, how the test will be guarded against interference, and when the report will come. EPA recommends an independent, qualified tester for the test after a system is installed.

What a professional test involves

A mitigation contractor

Get more than one estimate, contact references, and ask for a written proposal and a contract before any work starts.

How to choose a contractor

Questions

Common questions about New Jersey

Does New Jersey require radon professionals to be licensed?

Yes. New Jersey's radon program page, checked on September 25, 2026, says.

EPA's state contacts page lists New Jersey among the states with radon credentialing programs.

By law, all businesses and professionals conducting radon testing and mitigation in New Jersey must be certified by the DEP.
How do I find a certified radon mitigator in New Jersey?

No business is listed for mitigation in New Jersey on Radon411 yet.

Your state radon program can help you find qualified professionals in the state, and NRPP and NRSB, the two national proficiency programs EPA names, each publish a search of the professionals they certify.

How to choose a mitigation contractor

Who tests for radon in New Jersey?

No business is listed for radon measurement in New Jersey on Radon411 yet.

A qualified radon tester is very often a home inspector, and your state radon office can give you its approved list of radon testing companies.

What a professional radon test involves

Does New Jersey offer free or discounted radon test kits?

Radon Section's page, checked on September 25, 2026, says:

Check with your municipal or county health department for free radon test kits or purchase a test kit from a hardware store or a NJ certified radon business.

Free and discounted test kits by state

Does New Jersey have a radon disclosure rule for home sales?

Radon Section's page, checked on September 25, 2026, says:

Under the law, the seller must provide the buyer, at the time the contract of sale is entered into, with a copy of the results of the radon test and evidence of any mitigation or treatment.

Every state's program, licensing and disclosure rule

How current are the New Jersey listings?

New Jersey does not publish a list of licensed radon professionals that Radon411 can read, so the state's own search is the complete source.

Is every business on this page licensed in New Jersey?

No listing here is a license. The first list holds businesses New Jersey's own registry lists, or that confirmed their own listing; each card names its source.

45 businesses with an address in New Jersey appear in a separate list because another state's registry lists them. That does not mean New Jersey licenses them.

No business pays to be listed, labelled or placed higher here, and Radon411 sells no leads. How listings are verified. Run a radon business in New Jersey? Claim your listing.

Next steps

Where to go next