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​​​​​​​​Radon Division

The Radon Division helps to ensure public health and safety by increasing public and professional awareness of radon and its health risks within the Commonwealth.

The division administers a certification program for radon testing, mitigation and laboratory analysis individuals and firms.

The division provides an extensive amount of expert information to the general public on all matters related to radon. Also, assistance is provided to homeowners, builders and institutions for the monitoring and mitigation of radon.

Pennsylvania has one of the most serious radon problems in the country. An estimated 40 percent of Pennsylvania homes have radon levels above Environmental Protection Agency's action guideline of 4 picocuries per liter.

Radon: It's radioactive and it's real  

New: Our Re-entrainment Study is now available for review. Re-entrainment Final Report August 2021 (PDF) ​

Contact the Radon Division:

Radon Hotline: 800-237-2366
Phone: 717-783-3594
Email: Please see DEP's contact page
Fax: 717-783-8965

For hospitals only—to request the booklet “New Parent’s Edition Resident's Guide to Radon”  hospitals may email their request and address to our resource account RA-RadonPublications@pa.gov.