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State radon guide

Radon Testing, Mitigation Costs & Contractors in Maryland

Maryland health agencies provide radon education, test-kit information, and historical testing data. Radon can occur in any home, so regional data should be used as context rather than a substitute for testing.

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Testing your home

Use a properly placed home test or hire a qualified professional. For professional testing, preserve the distinction between the person placing the device and the laboratory analyzing the sample.

Free or low-cost test-kit information

Maryland's current radon page says residents may be eligible for a free radon test kit. Eligibility and inventory must be verified in the live state flow before displaying a guaranteed free offer.

Programs and inventory can change. Confirm current availability with the listed agency before relying on an offer.

Mitigation cost planning

Estimate only: a professionally installed residential radon mitigation system often falls in a broad $1,200–$3,500 range, but the final price can be lower or higher. Foundation type, crawlspaces, finished basements, multiple suction points, fan/pipe routing, electrical work, permits, diagnostics, and post-mitigation testing can materially change the quote. Use local written bids rather than treating this range as guaranteed pricing.

A test result provides important context, but it does not directly increase the modeled price.

Maryland rules and public resources

Needs Legal Verification: needs verification — Maryland law contains requirements for businesses testing indoor radon, including analysis requirements, but this review did not confirm a broad radon-specific individual licensing program comparable to states such as Minnesota or New Jersey. Legal/editorial verification is required before stating licensing rules.

EPA radon-zone context

Maryland provides historical ZIP-code radon data and EPA provides zone maps. Neither should be treated as an address-level prediction; test the home.

Testing is the only way to know. EPA radon zones are broad planning tools. Never use a zone, county, ZIP, or map to predict the radon level of a specific home or to decide that testing is unnecessary.

Public radon professional listings in Maryland

Directory inclusion is not an endorsement or a guarantee. Confirm current services, credentials, insurance where appropriate, pricing, service area, and availability directly.

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Frequently asked questions

Should every home in Maryland be tested for radon?

Testing is the only way to know the radon level in a specific Maryland home. Maps, county averages, a neighbor's result, and foundation type cannot replace a properly conducted test.

What does a result of 4 pCi/L mean?

EPA recommends taking action to reduce radon at 4 pCi/L or higher and suggests considering action between 2 and 4 pCi/L. The action level is not a line between safe and unsafe; long-term risk generally increases as exposure increases.

How much does radon mitigation cost in Maryland?

Pricing varies by the home and the system design. RadonCostGuide uses broad planning estimates only; foundation type, crawlspaces, finished areas, suction points, electrical work, permits, diagnostics, and post-mitigation testing can all affect the final quote.

How do I find a radon professional in Maryland?

Start with the state radon program and the NRPP/NRSB directories where appropriate. Independently confirm current credentials, insurance, scope of work, permits, warranties, service area, and pricing before hiring.

Are free or low-cost radon test kits available in Maryland?

Maryland's current radon page says residents may be eligible for a free radon test kit. Eligibility and inventory must be verified in the live state flow before displaying a guaranteed free offer.

Sources

Content reviewed 2026-08-22. Costs are planning estimates, not quotes or guarantees.