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Annapolis, MD Radon Levels

Check local Annapolis radon levels and find certified testing and mitigation professionals to keep your home safe


Annapolis, MD Radon Facts

EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)
County Anne Arundel County, MD
Zip Code 21401
Avg. User Level 4.30 pCi/L
User Tests 4

Maryland's historic capital in Anne Arundel County shows current radon testing with an average level of 4.25 pCi/L, which slightly exceeds the EPA action threshold and indicates potential need for mitigation in affected homes. The city's diverse housing spans from colonial-era structures to modern waterfront developments, built over the Chesapeake Bay region's complex geology of clay and sand deposits. Properties across Annapolis's multiple zip codes should prioritize regular radon testing, particularly those with basements or crawl spaces near the water.

4.30
pCi/L average
Above EPA Action Level

Based on 4 user-submitted radon tests for homes in Annapolis, MD. The EPA recommends taking action at or above 4.0 pCi/L.

0
4.0 EPA
10+

Annapolis, MD Radon Mitigation

Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.

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Annapolis, MD Radon Levels

User-submitted radon test readings from homes in the Annapolis area.

Radon LevelCityHome AgeFoundation
5 pCi/L Annapolis, MD
4 pCi/L Annapolis, MD 21-50 Years Partial Basement
4 pCi/L Annapolis, MD 0-20 Years Full Basement

Have a radon test result for Annapolis? Submit your reading to help other homeowners.

Radon FAQ for Annapolis, MD

What is the average radon level in Annapolis, MD?
Based on 4 user-submitted tests, the average radon level in Annapolis is 4.30 pCi/L. This exceeds the EPA's recommended action level of 4.0 pCi/L, and radon testing is recommended for all homes in the area.
What EPA Radon Zone is Annapolis in?
Annapolis and the 21401 zip code are in Anne Arundel County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.
How much does radon mitigation cost in Annapolis?
Radon mitigation in Annapolis typically costs between $800 and $2,000. Most homes with standard basements can be mitigated with a sub-slab depressurization system in the $1,000–$1,500 range. Factors that can increase cost include complex foundations, crawl spaces, or very high radon levels.
Should I test for radon if I'm buying a home in Annapolis?
Yes. Radon testing should be part of every home purchase. A short-term radon test is typically included as part of the home inspection process and costs $150–$250. If elevated levels are found, you can negotiate mitigation as part of the sale.

Most Active Radon Markets in Maryland

Cities in Maryland with the most user-submitted radon test data, ranked by number of submissions.

CityAvg User Radon LevelSubmissions
Frederick 8.29 pCi/L 7
Potomac 9.00 pCi/L 6
Hagerstown 8.67 pCi/L 6
Westminster 14.50 pCi/L 4
Baltimore 7.00 pCi/L 4
Annapolis 4.25 pCi/L 4
Upper Marlboro 15.00 pCi/L 3
Edgewater 12.67 pCi/L 3
Bowie 9.00 pCi/L 3
Frostburg 8.67 pCi/L 3