Get Radon Quotes Add or claim a listing

Radon testing and mitigation in St. Louis city, MO

13 certified radon testers and mitigation contractors in St. Louis city, MO. Mitigation contractors are listed first.

13 certified prosUpdated October 2026Source: state certification lists and the NRPP directory

Pros in this state come from the NRPP national certification directory (checked Oct 28, 2026). Get Radon Quotes is independent and not affiliated with NRPP. Some states also require a state license, so confirm with your state radon office before you hire. Your state radon office.

Cities in St. Louis city:Saint Louis

13 certified pros near St. Louis city, MO

Get free quotes from up to 3 certified radon pros near St. Louis city, MO

Tell us what you need and where. We send your request to up to 3 certified pros near you who offer that service, and they contact you directly.

What happens next

  1. We match your ZIP to certified pros nearby who offer the service you picked.
  2. Each pro gets your request and contacts you directly, usually within a business day.
  3. Compare quotes and pick one, or none. There's no fee and no obligation.

Free, no obligation. We don't sell your details to anyone else.

Prefer to choose yourself? Every certified pro is listed above with their phone number.

Run one of these businesses? Claim your listing, add a missing one or get featured in St. Louis city, MO.

Radon guides

Mitigation costHow to testResults explainedBuying or selling

Common questions

Who installs radon systems near St. Louis city, MO?

The certified mitigation contractors listed above serve St. Louis city, MO and the surrounding county. Get two or three quotes.

How much does radon mitigation cost near St. Louis city, MO?

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.