Leonardtown, MD Radon Mitigation and Testing

Q: What EPA Radon Zone is Leonardtown in?

Leonardtown is in St Mary's County, EPA Zone Unknown.

Q: How much does radon mitigation cost in Leonardtown?

Radon mitigation typically costs between $800 and $2,000. Most standard systems fall in the $1,000-$1,500 range.

St Mary's County

EPA Zone Unknown

Found in St. Mary's County within the Lexington Park metropolitan area, Leonardtown sits on Maryland's Western Shore where Coastal Plain sediments over older bedrock create variable radon potential. The area's housing includes historic properties dating to colonial times alongside modern suburban developments, many featuring crawl spaces and slab foundations typical of Tidewater construction. Since comprehensive testing data remains limited for this 20650 community, professional radon assessment is recommended for all residential properties.

Leonardtown, MD Radon Mitigation

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

Leonardtown, MD Radon Testing

Finding qualified radon testing professionals is the first step toward protecting your home.

Leonardtown Radon Facts

Key details about the radon risk profile for Leonardtown and the 20650 zip code area.

EPA Radon Zone

Unknown

County

St Mary's County, MD

Zip Code

20650

Predicted Screening Level

Unknown

Leonardtown and the 20650 zip code are located in St Mary's County, which has an EPA assigned Radon Zone of Unknown. A radon zone of Unknown does not have sufficient data for classification. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Leonardtown, MD

What EPA Radon Zone is Leonardtown in?

Leonardtown and the 20650 zip code are in St Mary's County, which has an EPA assigned Radon Zone of Unknown. A zone of Unknown does not have sufficient data for classification.

How much does radon mitigation cost in Leonardtown?

Radon mitigation in Leonardtown 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 Leonardtown?

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 with the most user-submitted radon test data in the state.

City	Avg User Radon Level	Submissions
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
Clarksburg	8.00 pCi/L	3
Gambrills	6.00 pCi/L	3
Elkton	5.33 pCi/L	3
Silver Spring	4.33 pCi/L	3
Chesapeake Beach	14.00 pCi/L	2
Cumberland	9.00 pCi/L	2
Frostburg	9.00 pCi/L	2
Owings	5.50 pCi/L	2
Huntingtown	4.50 pCi/L	2
Mc Henry	20.00 pCi/L	1
Mount Airy	20.00 pCi/L	1