Chapter 04 — The New Jersey file

Radon testing & mitigation in New Jersey

This site imports no New Jersey state roster, so these are current NRPP and NRSB certifications from those programs’ public finders. A national certification is not a state license. We group people by the city on that file. We do not invent neighborhoods. Source: NRPP.

Latest credential check October 13, 2026. Methodology Individual record dates may be earlier.

81current listings
72testing
9mitigation
Fig. 4 — 70 of 81 current listings are mapped. 11 records have an in-state place but no verified city or county coordinate. Each pin is a current listing at the Census city or county centroid on the file, approximate. Pins that share a place are spread so you can click them. Not street addresses.

§ 4.1

Cities with listings

A city appears only when at least one current listing serves it.

§ 4.3

How to verify a radon credential in New Jersey

NJ DEP certifies radon work in New Jersey but publishes no list with credential numbers that we can import, so listings here are national NRPP or NRSB certifications instead. A national certification is not the New Jersey credential. Ask the agency directly: 800-648-0394 or 609-984-5425.

NRPP finder · NRSB finder · EPA guidance · All fifty states · reviewed September 8, 2026

§ 4.4

Questions about radon credentials in New Jersey

Does New Jersey license radon testers and mitigators?

Yes. NJ DEP certifies radon work in New Jersey. It publishes no current list with credential numbers that we can import, so this site cannot show the New Jersey credential itself.

How do I verify a radon credential in New Jersey?

Ask NJ DEP directly: 800-648-0394 or 609-984-5425. The 81 listings shown here are current NRPP or NRSB certifications, which you can check on those programs' public finders, but they are not the New Jersey credential.

Is an NRPP or NRSB certification enough in New Jersey?

No. New Jersey credentials radon work separately through NJ DEP. A national certification does not satisfy that requirement. Ask any provider for their New Jersey credential and verify it with the agency before you hire.