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Radon testing and mitigation in Delaware County, PA

8 state-certified radon testers and mitigation contractors in Delaware County, PA. Mitigation contractors are listed first.

8 certified prosUpdated October 2026Source: state radon certification lists

Source: PA DEP Radon Services Directory, list dated Oct 1, 2026. Get Radon Quotes is independent and not affiliated with the PA Department of Environmental Protection. Certifications expire, so check before you hire: Verify a certification or call the PA Radon Hotline at 800-237-2366.

8 certified pros near Delaware County, PA

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Radon guides

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Common questions

Who installs radon systems near Delaware County, PA?

The certified mitigation contractors listed above serve Delaware County, PA and the surrounding county. Get two or three quotes.

How much does radon mitigation cost near Delaware County, PA?

Typical residential systems cost in the high hundreds to low thousands of dollars depending on the foundation and how the pipe is routed. See our mitigation cost guide.