How to Remove Radon From Well Water
Radon is a colorless, odorless radioactive gas that naturally seeps into groundwater from surrounding rocks and soil. When you use well water in your home—whether for showering, washing dishes, or doing laundry—radon is released into your indoor air, increasing your family’s lung cancer risk. Unlike many water contaminants that affect taste or cause stomach problems, radon’s danger lies primarily in the air you breathe inside your home. Because of this, it’s crucial to address radon at the point where water enters the house to protect everyone’s health effectively.
What Causes Radon in Well Water?
Radon originates from the natural decay of uranium found in soil and rock beneath your property. As rainwater and groundwater move through these materials, the radon gas dissolves into the water supply. This is particularly common in private wells, which draw directly from groundwater sources without treatment steps typical in municipal water systems. When you use this water for household activities, radon escapes from the water into the air. Since radon is radioactive, inhaling it increases your risk of developing lung cancer over time.
Radon in water is not usually harmful if swallowed, but the primary concern is the radon gas released during water usage. For example, shower steam releases radon, which can accumulate indoors if your home isn’t properly ventilated. Testing is the only way to know if radon levels in your water pose a risk.
Signs & Health Impact
You won’t notice radon in your water by smell, taste, or appearance. The most reliable indicator is a specialized test. The key health risk is lung cancer, not stomach issues, due to the inhalation of radon released from water during household use. If you have a private well, experts recommend testing your water for radon and acting on the results to reduce indoor air exposure.
Indoor radon is considered a significant health hazard by the EPA, second only to smoking as a cause of lung cancer. If your water test shows radon levels above safety guidelines, it means your family could be exposed to elevated radon gas inside the home, significantly increasing health risks.
How to Treat Radon in Well Water
Treatment for radon in well water always focuses on removing radon before it enters your home’s plumbing system—this is called point-of-entry treatment. Since the main risk is breathing radon gas released from water in your home, you need to treat the entire water supply, not just drinking water.
There are two main treatment methods:
1. Aeration: This is the EPA-preferred treatment for higher levels of radon in water. It involves bubbling air through the water in a treatment tank, which strips radon gas out. The released radon is then vented safely outdoors, preventing it from accumulating indoors. Aeration is efficient for reducing radon in water to very low levels and protects your entire household.
2. Granular Activated Carbon (GAC): This method uses carbon media to adsorb radon from water as it passes through. GAC is better suited for lower radon concentrations because over time the carbon can accumulate radioactive material. GAC systems require proper maintenance and disposal of used media to avoid contamination.
Both methods require careful sizing and installation to work effectively for your home’s water usage and radon levels.
How to Choose and Size a Radon Treatment System
Start by testing your water with a certified waterborne-radon test kit. You can find reliable kits and expert assistance online or through local health departments. If your radon levels are elevated, consider which treatment option best suits your needs:
- For radon levels above moderate thresholds, aeration systems are generally recommended.
- For lower radon levels, GAC systems may suffice but require careful media management.
- Always choose point-of-entry treatment to protect household air quality.
Water flow rate is critical when sizing your system. A system that’s too small won’t adequately treat all your water, while one that’s too big wastes money and space. Use a sizing chart or ask for expert help to identify the right solution for your home’s water demand: https://watersoftenerplus.com/pages/water-softener-sizing-chart
Remember that treatment is an investment in long-term health and safety. It’s also wise to retest water after installing a treatment system to ensure radon levels are effectively reduced.
FAQ
How do I test my well water for radon?
You need a certified waterborne-radon test kit designed for private wells. These kits are available online or through environmental health services. Testing ensures you know whether radon is present and in what concentration before choosing a treatment method.
Can I treat radon with a reverse osmosis (RO) system?
RO systems focus on removing dissolved solids and contaminants but do not effectively remove radon gas. Because inhalation of radon released from water usage is the risk, point-of-entry aeration or GAC treatment is necessary for radon.
Is radon only dangerous if I drink the water?
No. The primary health risk from radon in well water comes from inhaling radon gas released during water use, such as showering. Drinking small amounts of radon in water is less of a concern compared to airborne exposure.
Can I install a radon treatment system myself?
Due to the complexity and safety concerns with radioactive gases, it's recommended to consult certified professionals for installation. Also, sizing and venting requirements are critical for proper operation.
Next Steps
If you rely on well water, testing for radon is an important step in protecting your home’s air quality and your family’s health. Free expert help is available for water quality questions and product recommendations at https://watersoftenerplus.com/pages/water-assistant and https://watersoftenerplus.com/pages/request-a-product. After testing, you can confidently select an effective treatment system tailored for your water’s radon levels.
