Understanding Radon: A Guide for Missouri Homeowners

Sep 21, 2025

What is Radon?

Radon is a naturally occurring radioactive gas that can pose significant health risks if it accumulates in your home. This odorless, colorless, and tasteless gas is produced by the natural breakdown of uranium in soil, rock, and water. It can seep into homes through cracks in floors and walls or through gaps around service pipes.

radon detection

For homeowners in Missouri, understanding radon is crucial because the state is known to have elevated levels of this hazardous gas. The Environmental Protection Agency (EPA) and the Missouri Department of Health and Senior Services recommend that homes be tested for radon regularly.

Health Risks Associated with Radon

Radon exposure is a serious health concern, as it is the second leading cause of lung cancer in the United States, following smoking. The risk is particularly high for smokers exposed to elevated radon levels. Long-term exposure can lead to lung tissue damage, increasing the probability of cancer over time.

The presence of radon is not just a concern for older homes; new constructions can also be susceptible if built on land with high uranium content. Therefore, it's essential for all homeowners to be aware and proactive in managing radon levels.

How to Test for Radon

Testing your home for radon is simple and inexpensive. There are two main types of tests available: short-term and long-term tests. Short-term tests remain in your home from two days to 90 days, while long-term tests measure radon levels for more than 90 days, providing a more accurate annual average.

home radon test

You can purchase radon test kits online or from home improvement stores. Alternatively, you can hire a certified radon professional to conduct the test for you. The EPA recommends testing all homes below the third floor for radon.

Radon Mitigation Strategies

If your home tests above the EPA action level of 4 picocuries per liter (pCi/L), mitigation steps should be taken to reduce radon levels. Common mitigation techniques include soil suction, which pulls radon from beneath the house and vents it outside, and sealing cracks and openings to prevent radon entry.

Hiring a qualified radon mitigation contractor is crucial to ensure that the work is done correctly and effectively. Look for contractors certified by the National Radon Proficiency Program (NRPP) or the National Radon Safety Board (NRSB).

home improvement contractor

Maintaining a Safe Home Environment

After mitigation, it's important to retest your home periodically to ensure radon levels remain low. Continuous monitoring can provide peace of mind and help maintain a safe living environment. Additionally, consider incorporating radon-resistant features if you're building a new home.

In summary, understanding and managing radon levels in your Missouri home is vital for protecting your family's health. Regular testing, effective mitigation, and ongoing monitoring are key steps in ensuring a safe and healthy living space.