Understanding Radon Risks in Maine: How to Keep Your Home Safe

February 19th, 2025 by Sherwin Sape

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Understanding Radon Risks in Maine: How to Keep Your Home Safe - Image 1

Radon, an invisible and odorless radioactive gas, is a silent threat that can accumulate in homes and pose severe health risks, including lung cancer. In Maine, radon is a significant concern due to the state's geological composition, which makes many homes vulnerable to elevated levels. Understanding these risks and taking proactive measures can help protect your home and family.

Radon Levels in Maine

Maine has some of the highest radon levels in New England, with many homes testing above the Environmental Protection Agency's (EPA) action level of 4.0 pCi/L. The state’s granite-rich soil releases radon, which can seep into homes through foundations, basements, and well water. Counties such as Cumberland, York, and Penobscot have recorded higher-than-average radon levels, making testing and mitigation essential.

What Contributes to High Radon Levels?

Radon exposure is influenced by soil composition, climate, and construction practices. The EPA’s Radon Zone Map classifies areas into three risk zones:

Zone 1 (High Potential): Predicted indoor levels above 4.0 pCi/L.
Zone 2 (Moderate Potential): Levels between 2–4 pCi/L.
Zone 3 (Low Potential): Levels below 2 pCi/L.

Maine has several Zone 1 and Zone 2 areas, meaning that many homes are at risk of elevated radon exposure. For an in-depth look at radon levels in your county, visit Maine’s Department of Health and Human Services website.

Health Risks of Radon Exposure

Long-term radon exposure is the second leading cause of lung cancer in the U.S., according to the American Cancer Society. Smokers exposed to radon have an even higher risk of developing lung cancer. Since radon has no immediate symptoms, regular testing is the only way to detect its presence and reduce exposure risks.

How to Test for Radon in Your Maine Home

DIY Radon Testing Kits

Homeowners can purchase affordable radon test kits online or from local hardware stores. For the most accurate results:

Place the kit in the lowest lived-in level of your home.
Keep windows and doors closed as much as possible during the test.
Avoid testing during extreme weather conditions.

For more guidance, check out the EPA’s Radon Testing Guide.

Professional Testing Services

Certified radon professionals use advanced methods to detect radon accurately. Maine residents can find licensed radon testers through the Maine Radiation Control Program (Radon Section).

Effective Radon Mitigation Strategies

Long-Term Mitigation Solutions

For homes with high radon levels, installing a radon mitigation system is the most effective solution.

Active soil depressurization (ASD) is the preferred method, using a vent system and fan to direct radon safely outside before it enters the home.

Temporary Fixes

While not as reliable as professional mitigation, sealing foundation cracks and improving ventilation can help reduce radon levels temporarily.

Hiring Professionals

Professional installation ensures the system is tailored to your home’s structure. Maine residents can find trusted mitigation providers through Maine Radon & Water Treatment, which offers expert radon and water treatment solutions. Our team provides certified testing and mitigation services to help homeowners maintain a safe living environment.

Maine’s Focus on Radon Awareness

Maine actively promotes radon awareness through local health initiatives and educational programs. The Maine CDC offers resources, including:

Free or discounted radon test kits for qualifying households.
Public workshops on radon risks and mitigation.
Assistance programs for homeowners seeking financial support for mitigation.

Tips for Staying Safe in High-Radon Areas

Test your home annually, especially during colder months when windows are closed.
Monitor frequently used areas such as basements and bedrooms.
Educate yourself through government resources like the Maine CDC’s Radon Awareness Program.
Participate in community events that promote radon education and testing.

Protect Your Home and Family Today

Radon poses a serious health risk, but with proper testing and mitigation, you can significantly reduce exposure. Maine’s geology makes radon a widespread issue, but homeowners can take action by testing their homes and consulting a certified radon professional.

Don’t wait—test your home for radon today and take the necessary steps to ensure long-term safety for your family.