Children and Radon: Why Testing Your Home Matters for Children’s Health

Children’s health depends on more than nutritious food, physical activity, and regular medical care. The air they breathe indoors also matters. One hidden concern is radon, a naturally occurring radioactive gas that can accumulate inside homes without any visible warning.

October is Children’s Health Month, making it a timely opportunity for families to learn about environmental hazards that may affect growing children. Among these concerns, radon exposure risks for children deserve attention because prolonged radon exposure can increase the risk of lung cancer.

The challenge is that radon has no color, smell, or taste. A home may appear clean and healthy while containing elevated radon levels. Understanding how radon enters a house, why exposure matters, and how to test for it can help parents make informed decisions about their family’s health.

What Is Radon, and How Does It Enter Your Home?

Radon is a radioactive gas produced naturally when uranium in soil, rock, and groundwater breaks down. It can move through the ground and enter buildings through cracks in foundations, gaps around pipes, construction joints, and other openings.

Once inside, radon can accumulate, particularly in basements and lower-level rooms. Changes in air pressure, weather, and ventilation can influence how much radon enters and remains indoors.

According to the U.S. Environmental Protection Agency (EPA), elevated radon levels have been found in every U.S. state. The gas can affect older houses, newly constructed properties, and homes with or without basements.

Unlike visible environmental hazards, radon cannot be detected through smell or appearance. Opening windows occasionally or keeping a home clean does not establish whether radon levels are low. Radon testing for homes is the only reliable way to determine the concentration of this gas indoors.

Radon Exposure in Children: Why It Matters

Children are still developing physically, and their breathing patterns differ from those of adults. The Centers for Disease Control and Prevention (CDC) explains that children may receive higher inhaled doses of radon than adults exposed to the same concentration for the same period.

However, current evidence is insufficient to establish that children have a higher lifetime risk of developing lung cancer from radon than adults. The established concern is the long-term health risk associated with inhaling radioactive particles released as radon decays.

How Radon Affects Children's Health

When radon enters the lungs, its radioactive decay products can release energy that damages cells lining the airways. Repeated exposure over time can contribute to the development of lung cancer.

Radon-related illness generally develops over many years rather than causing immediate symptoms. A child exposed today may not experience health consequences until adulthood.

Several factors make exposure worth addressing:

• Long-term exposure: Spending extended periods in a home with elevated radon levels increases cumulative exposure.

• Indoor environments: Children may spend considerable time sleeping, playing, studying, and relaxing indoors.

• Invisible exposure: Because radon cannot be seen or smelled, families may remain unaware of elevated levels without testing.

Understanding radon and children's health means focusing on prevention rather than waiting for symptoms. There is no reliable way to identify elevated radon levels by observing a child's health or behavior.

Radon Levels in Homes: Understanding EPA Guidelines

Radon concentrations vary from one property to another, even between neighboring houses. A home’s location, foundation, soil conditions, construction, and ventilation can influence its indoor radon levels.

The EPA measures radon in picocuries per liter (pCi/L) of air and guides to help homeowners interpret their results. 

The EPA's radon action level guidance explains when homeowners should consider taking action. The 4 pCi/L threshold is not a guarantee of safety below that level. There is no known risk-free level of radon exposure, and reducing indoor concentrations can lower long-term risk.

How to Protect Children from Radon

Parents do not need specialized equipment or technical expertise to begin addressing this risk. A few practical steps can help identify a problem and guide the next actions.

1. Test Your Home for Radon

If your home has never been tested or its radon history is unknown, arrange a test. You can use a do-it-yourself test kit or hire a qualified radon measurement professional.

Follow the kit's instructions carefully, including its placement and testing duration. Testing the lowest lived-in level is generally a useful starting point, particularly if it includes a basement or ground-floor rooms.

Short-term tests provide an initial assessment, while long-term tests help account for variations in radon concentrations over time. Learn more about radon testing to understand the available testing methods and choose an appropriate approach for your home.

2. Monitor Changes in Indoor Radon Levels

Radon concentrations can fluctuate with weather, ventilation, seasonal conditions, and building use. Periodic measurements can help families understand these changes and identify when further testing is appropriate.

Real-time radon monitors provide ongoing readings, helping homeowners observe trends rather than relying exclusively on a single measurement. Ecosense offers smart radon monitoring devices that use patented ion-chamber detection technology to deliver radon results in minutes.

Continuous monitoring can complement established testing practices, but elevated readings should be evaluated using appropriate testing guidance.

3. Reduce Elevated Radon Levels

If testing identifies elevated radon, contact a qualified radon mitigation professional. Common mitigation systems use specialized vent pipes and fans to collect radon from beneath a building and exhaust it outdoors.

Sealing foundation openings may support the process, but sealing alone is generally not a reliable substitute for a properly designed mitigation system.

After installation, retest the home to confirm that radon levels have decreased. Continue following the system manufacturer's maintenance recommendations and applicable testing guidance. The EPA provides further information about radon risks and solutions.

4. Consider Other Indoor Environments

Children may also spend many hours in schools, preschools, and other indoor environments. Parents can ask school administrators whether radon testing has been conducted and whether elevated readings were addressed. The EPA's guidance on radon in schools and buildings provides additional information about radon in these settings.

Because radon concentrations vary by building, a low reading at home does not establish that another property has low levels. Indoor air safety requires attention to each building's conditions and testing history.

Protecting Children's Health Starts With Knowing Your Indoor Air

Radon is an invisible environmental hazard, but families can take practical steps to reduce exposure. Testing helps identify elevated concentrations, and appropriate mitigation can lower radon levels in affected homes.

During Children’s Health Month and throughout the year, parents can make indoor air quality part of their broader approach to protecting their children. Testing is especially important when a home's radon history is unknown.

Knowing your home's radon levels is a practical first step toward a healthier indoor environment. With reliable measurements, informed decisions, and effective mitigation when needed, families can take meaningful action to reduce long-term exposure risks.

Frequently Asked Questions

1. Can a home's location predict its radon level?

No. EPA radon zone maps show general geographic potential, not the concentration inside an individual property. Homes in the same neighborhood can have different readings, so every home should be tested regardless of its mapped zone.

2. Should I test for radon before buying a house?

Yes. Include radon testing in your home-buying due diligence, even if the seller provides previous results. If elevated levels are found, discuss mitigation options, costs, and follow-up testing before finalizing your decision.

3. Where should a radon test be placed in a home?

Place the test in the lowest level that people regularly occupy or could use as living space, following the manufacturer's instructions. Keep it away from drafts, exterior walls, high humidity, and other conditions specified in the test guidance.

4. Can radon enter a home through drinking water?

Yes. Radon in groundwater can be released into indoor air when water is used for showering, washing, or cooking. This is generally a smaller concern than soil gas, but private well water may warrant assessment if radon is suspected.

5. What should homeowners do after radon mitigation?

Retest after the mitigation system is installed to verify that it reduced indoor radon levels. If results remain elevated, contact the contractor to assess system performance and determine whether adjustments or additional measures are needed.

6. Can renters request radon testing?

Yes. Renters can ask their landlord or property manager about previous radon results and arrange testing where permitted. If levels are elevated, share the results in writing and consult local housing authorities or the state radon program about next steps.