Maryland Radon Information

Maryland Radon Levels

Maryland has a user submitted radon level of 8.69. This is based on data submitted from visitors on our site. Learn more here.

EPA Radon Levels

Maryland has 20 counties and 8 (40%) have been assigned Zone 1 counties by the EPA. Zone 1 counties have the highest potential to have homes test higher than 4 pCi/L. Maryland's state radon zone average is 1.9, which is the average of all county zone ratings the EPA has assigned the state, ranking it 29 among all states.

The radon levels in Maryland are above average. Some Maryland homes have been found to have radon levels higher than 200 pCi/L. These levels are 50 times higher than the action guidelines set by the US EPA. If you were to spend your lifetime in a house with radon levels of just 10 pCi/l - a fraction of the levels above - you have a lung cancer risk similar to smoking nearly a pack of cigarettes a day. As such, there’s an increased risk for all homeowners, which is why we recommend testing exposure levels at least twice a year.

Maryland Radon Mitigation and Testing

Need your home tested for radon? Already know you have high levels and need a radon reduction system installed? Finding qualified Radon professionals can be difficult, but we've put together a list of Maryland contractors to help you save time.

Maryland Radon Mitigation

We have compiled a list of qualified radon mitigation contractors.
Find Radon Mitigation Contractors here

Maryland Radon Testing

Need your home or office tested for Radon? We have compiled a list of qualified radon testing contractors.
Find Radon Testing Contractors here

Maryland Radon Contractor License Information

Does Maryland require contractors to be licensed? No.

What are the licensing requirements? There are no state mandated requirements to become a licensed radon contractor in Maryland. Those looking for a radon certification can take qualified third party courses that are offered through the NRPP or AARST.

Maryland Radon Real Estate Requirements

Does the state of Maryland require radon testing for all real estate transactions? No

However both the state of Maryland and the EPA recommend that a home or residence should be tested before a real estate transaction is carried out. Even though Maryland does not require radon testing, we certainly recommend you have a test performed before you purchase a home. If you decide to perform a test after and find elevated levels, there is no reason to panic. Maryland radon mitigation is not expensive compared to the dangers and a system can be implemented in a relatively short period of time.

Maryland Radon Map

Zone 1 (1): Potential for radon levels above 4 pCi/L according to EPA
Zone 2 (2): Potential for radon levels between 2 pCi/L and 4 pCi/L according to the EPA
Zone 3 (3): Lowest EPA level with expected radon levels at or below 2 pCi/L
Disclaimer: It is strongly recommended that all households, schools and office spaces test radon levels individually. The EPA Radon Zone data is not an indicator of individual test results, but a guideline for strategic planning. Toxic radon levels can be found in all counties, regardless of their zone rating. While we make efforts to keep this information up to date, it is derived from third­party sources which may not be accurate or reflect the most current statistics.

About Maryland

Maryland is the smallest state in terms of size and yet it is one of most populous in the entire US. The state does not have an active radon program.

Browse The National Radon Directory by City