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Radon professionals in Massachusetts

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

Updated October 2, 2026

Massachusetts at a glance

  • Businesses listed

    1

    20th of 20 states

    MA
    1
    Ohio
    478

    On Massachusetts's own list, or claimed there

  • Listed for testing

    1

    100% of listings

    Testing
    1
    Mitigation
    1

    A business can be listed for both

  • Share at 4+ pCi/L

    23.6%

    12.2 pts below U.S.

    MA
    23.6%
    U.S.
    35.8%

    248,798 tests across 14 counties, 2007 to 2016

  • Counties in EPA Zone 1

    3 of 14

    Some at highest potential

    Zone 1
    3
    Zone 2
    10

    EPA's predicted potential; Zone 1 is the highest

Radon professionals listed for Massachusetts

1 professional in Massachusetts.

Located in Massachusetts, licensed by another state

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

4 professionals located in Massachusetts and listed by another state.

By city

3 cities in Massachusetts with a listed business address.

Every radon business listed in Massachusetts, A to Z (5)

Short answer

Radon professionals in Massachusetts, in brief

Radon411 lists 1 radon business for Massachusetts: 1 listed for radon measurement (testing), 1 for mitigation and 1 of them for both. Ask Radon Unit what it requires before you hire.

Radon levels

Read a radon result for Massachusetts

Before you call a professional: what EPA says about a test result, beside Massachusetts's own share of high tests.

Read a result for Massachusetts

Starts at EPA's action level

4.0pCi/L

EPA’s own thresholds; the figures are the area’s, never this home’s.

EPA’s reading of 4.0 pCi/L

At or above 4 pCi/L

  1. Under 20 to 1.9 pCi/L
  2. 2 to 4consider a fix
  3. 4 and aboveEPA says fix it

This result is at or above 4 pCi/L. EPA recommends fixing a home when the radon level is 4 pCi/L or higher. 23.6% of Massachusetts's reported tests reached 4 pCi/L, 2007 to 2016.

Interpret this readingWhat a fix costs

Radon levels in Massachusetts, county by county

The rule

Does Massachusetts license radon professionals?

Massachusetts's radon program page, checked on November 3, 2026, does not say whether the state licenses or certifies radon professionals. Ask the program before you hire.

Massachusetts is not on the list of states with radon credentialing programs that EPA's state contacts page publishes. 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.

State program

Massachusetts's radon program

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

Radon Unit

Department of Public Health

Phone (800) 723-6695 · Email DPHIAQ.radon@mass.gov

Visit the program's page (opens in a new tab)Read November 3, 2026

Nearby

Listed professionals in states next to Massachusetts

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

Before you hire

How to check a credential in Massachusetts

  1. Massachusetts's own list

    Start with Massachusetts's radon program. Licensing is done by the state, and most states can give you a list of radon service providers working there.

  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 Massachusetts

A tester

1 business is listed for testing here. 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

1 business is listed for mitigation here. 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 Massachusetts

Does Massachusetts require radon professionals to be licensed?

Massachusetts's radon program page, checked on November 3, 2026, does not say whether the state licenses or certifies radon professionals. Ask the program before you hire.

Massachusetts is not on the list of states with radon credentialing programs that EPA's state contacts page publishes.

How do I find a certified radon mitigator in Massachusetts?

Radon411 lists 1 business for mitigation in Massachusetts, each with the source that lists it.

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.

Mitigation listings for MassachusettsHow to choose a mitigation contractor

Who tests for radon in Massachusetts?

Radon411 lists 1 business for radon measurement in Massachusetts.

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.

Testing listings for MassachusettsWhat a professional radon test involves

Is every business on this page licensed in Massachusetts?

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

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

How listings are verified. Run a radon business in Massachusetts? Get Featured.

Next steps

Where to go next