You cannot detect radon gas with your senses, yet this radioactive gas silently enters thousands of homes across the United States. It naturally rises from the ground and seeps into buildings through cracks in the foundation, posing serious health risks to everyone inside. Geography plays a major role in determining radon levels by region. Learn why some areas are more at risk and what you can do to protect your health.
The Health Consequences of Radon Exposure
Long-term exposure to radon gas is a major health concern because it damages the cells lining the lungs. As radon decays, it releases radioactive particles that become trapped in the respiratory system. This exposure is one of the leading causes of lung cancer among non-smokers and is responsible for about 21,000 lung cancer deaths in the US each year. The danger increases for individuals who smoke, as the combined effects of radon gas and tobacco smoke greatly multiply the risk of developing lung cancer.
Testing and Mitigation
Testing is the only way to verify radon gas concentrations. If your home or business has elevated levels, professionals will follow proven steps in radon mitigation services to vent the gas from beneath the house to the outside air. This process lowers radon concentrations and protects the living space.
The most common mitigation method, active soil depressurization, uses a pipe and a fan to pull radon from under the foundation and exhaust it above the roofline. This system prevents the radon gas from entering your home in the first place. Additionally, a contractor will seal foundation cracks and other openings to improve the system’s effectiveness and block entry points.
Understanding Geological Risk Factors
Radon gas originates from the natural breakdown of uranium found in soil, rock, and water. Certain geological formations, like those rich in granite or shale, contain higher concentrations of uranium. Therefore, homes built on land with these deposits are more likely to have elevated indoor radon levels.
The soil’s permeability also affects how easily radon travels to the surface. Loose, granular soils, like gravel, allow the gas to move freely, while dense clay can trap it underground. As a result, regions with moderate uranium content may have high radon levels if soil composition makes it easier for the radon gas to rise.
High-Risk Zones in the US
The Environmental Protection Agency (EPA) has identified specific areas with a high potential for elevated radon gas, labeling them as Zone 1. These regions are concentrated in the Northern Plains, the Midwest, and the Appalachian Mountains.
The underlying geology provides a general risk map of radon gas exposure. For example, a geological feature known as the Reading Prong runs through parts of Pennsylvania, New Jersey, and New York, contributing to some of the highest natural radon levels in the country. In contrast, coastal regions in the Southeast and along the Gulf Coast generally have lower average radon levels. However, no area is completely free of risk.
Radon comes from the natural breakdown of uranium in soil, rock, and water. Certain regions in the US are more at risk for elevated radon levels, but every home’s situation is unique. Remember that your neighbor’s test results do not reflect the safety of your own house. Test your home for radon to protect your household from this preventable health threat.
This article was written for WHN by Casey Cartwright, a passionate copyeditor highly motivated to provide compelling SEO content in the digital marketing space. Her expertise includes a vast range of industries, from highly technical to consumer and lifestyle-based, with an emphasis on attention to detail and readability.
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