Radon in Water Testing
Understand how radon in your well water contributes to indoor air exposure.
Schedule Radon TestingWhat Is Radon in Water?
Radon is a naturally occurring radioactive gas formed from the breakdown of uranium in rock and soil. In Maine, it can dissolve into groundwater and enter private wells.
Radon is invisible, odorless, and tasteless. It cannot be detected without testing, and it behaves differently from most other water contaminants.
How Radon in Water Affects the Home
Radon in water is not just a drinking water issue. When water is used in the home for showering, cooking, or washing, radon gas can be released into the air and inhaled.
This means radon in water contributes to overall indoor air radon levels, which is the primary health concern associated with radon exposure.
You can learn more about how radon behaves in water and air from the EPA’s overview of radon in water.
Radon in Maine Wells
Maine has some of the highest radon levels in the country due to its geology. Radon is commonly found in both soil and groundwater across the state.
The Maine CDC sets an advisory level of 4,000 pCi/L for radon in well water.
At or above this level, homeowners should begin evaluating their total radon risk
and consider treatment options.
Maine CDC Radon Information
As radon levels approach 10,000 pCi/L, treatment becomes more strongly recommended.
Why Radon Testing Matters
Radon is a leading cause of lung cancer, and the primary risk comes from inhalation, not ingestion. When radon is released from water into the air, it contributes to total indoor exposure.
Because radon levels vary significantly from one property to another, testing is the only reliable way to determine whether a home is affected.
Both air and water testing should be considered together when evaluating radon risk.
How Chanalytical Supports Radon Testing
Chanalytical provides local, laboratory-grade radon testing for private well water. Our goal is to give homeowners clear, reliable information so they can understand how water contributes to overall radon exposure.
The process is straightforward:
• Guidance on when radon in water testing is appropriate
• Proper sample handling and submission support
• Convenient drop-off locations across Maine
• Clear results to support next steps
What Happens If Radon Is Found?
Detection does not mean immediate danger. It means you now understand your exposure and can evaluate next steps.
Treatment options may include aeration systems or granular activated carbon filtration, depending on the level and overall radon profile of the home.
Because radon exposure is often driven by indoor air levels, water testing is most effective when considered alongside air testing results.
Understand Your Total Radon Risk
Radon in water is one part of the equation. Testing gives you the full picture.
Schedule Radon Testing