Radon in water

Radon in water is a separate issue from radon in indoor air, and it needs its own test. The rule here is the same as everywhere else on this site: test first, treat what the lab actually found.

Fairfield Well Water connects Connecticut well owners with one licensed local well & water-treatment company — fast. We are a referral service, not a contractor.

What is radon in water?

Radon is a naturally occurring gas that comes from the breakdown of uranium in rock and soil. In some areas it dissolves into groundwater, so a private well can carry it into your home's water supply. You can't see, smell, or taste it — only a lab test of your water reveals it. Connecticut's Department of Public Health (DPH) tracks radon in water and provides guidance on testing and treatment.

Radon in water vs. radon in air

These are two different tests with different treatments. An indoor-air radon test does not tell you anything about your water, and a water test does not tell you anything about your air. If you have concerns about both, test both. This page is about water only.

How testing works

Request a test through the form — choose "Water test" and note radon in the description of the problem.
The specialist arranges sampling following lab instructions, since radon samples are time-sensitive and must reach the lab promptly.
A certified lab reports your level and the specialist explains what the result means in plain language, including what CT DPH guidance says about it.

How is radon in water treated?

The treatment most often used for radon in water is aeration: the water is sprayed or agitated in a tank so the radon gas is released and vented safely outside before the water reaches your taps. The system is sized to your water use and your lab result. The specialist will explain what the system is designed to do based on your results — we make no promises about specific outcomes, and no treatment should be sold before a test.

What does it cost?

Radon-in-water aeration systems typically run $5,000–$7,000 per CT DPH guidance. That range is general market information, not a quote — your specialist confirms the exact price, after test results, before work begins. We never charge homeowners anything.

Request a radon-in-water test