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Radon in Water Treatment in New Hampshire
Radon in water is distinct from radon in air and comes from the same New Hampshire bedrock. A licensed local contractor can test your well and recommend the right system. Start with a free in-home water test and quote.
What it is and why New Hampshire wells need it
Radon is a radioactive gas produced as uranium decays in bedrock, and in New Hampshire it dissolves into groundwater in many bedrock wells. Radon in water is a separate issue from radon in indoor air, though they are related: when you run a faucet, shower, or washing machine, radon escapes from the water into the air you breathe.
NHDES notes that the health risk from radon in water is lower than from radon in air, but some New Hampshire wells carry enough radon in water to raise indoor air levels and add to lung-cancer risk. NHDES recommends treating the water when radon is at or above 10,000 picocuries per liter, and treatment may be advisable between 2,000 and 10,000 picocuries per liter when indoor air radon is also elevated.
A water test tells you your radon level, and a contractor can match the right system to it.
How a contractor treats radon in water
Whole-house aeration
Aeration bubbles air through the water to release radon before it reaches your taps, then vents it safely outside. NHDES considers aeration the preferred treatment for radon in water, especially at higher levels, because it removes radon without concentrating it indoors.
Granular activated carbon
A granular activated carbon filter can be used when radon is at or below 10,000 picocuries per liter. The carbon adsorbs radon, but it concentrates radioactivity, so the media is changed every one to two years and a contractor places and manages it carefully.
Matching the method to your level
A contractor chooses between aeration and carbon based on your radon level and household. Higher levels point toward aeration, while a carbon system can suit lower levels where placement and disposal are handled correctly.
Looking at air as well as water
Because radon in water adds to radon in air, a contractor may suggest testing your indoor air too, so the water system and any air mitigation work together.
What to expect
- 1
Request a free in-home water test
Use the form or call. A licensed local contractor sets up a visit at no cost.
- 2
The contractor tests your water and reviews the results
You get a plain explanation of what is in your water and what it means.
- 3
You get a written, itemized recommendation and quote
If treatment makes sense, the recommendation is matched to your water, with the cost in writing.
- 4
The contractor installs the system
If you choose to proceed, the contractor installs and configures the system for your home.
- 5
The contractor confirms performance and explains maintenance
You leave with a clear maintenance schedule and, where relevant, a retest plan.
What radon in water treatment costs in New Hampshire
Radon treatment cost depends mostly on the method. A whole-house aeration system is a larger point-of-entry installation and generally costs more than a single filter, while a granular activated carbon system is usually less to install but carries media-replacement and disposal considerations.
Because the right choice hinges on your radon level and your home, the free in-home test and written quote are the honest way to get a real number. We do not publish a flat price, since a number that ignores your water would not mean much.
Where this fits
Related services a contractor often pairs with this one:
Serving well owners in these and other New Hampshire towns:
Read: Uranium and Radon in New Hampshire Well WaterFrequently Asked Questions
Is radon in water the same as radon in air?
No, but they are connected. Radon in water is the radon dissolved in your well water, and some of it escapes into indoor air when you use water. Radon in air is the larger health concern, and treating the water reduces the part that comes from your well.
At what level does NHDES recommend treating radon in water?
NHDES recommends treating the water when radon is at or above 10,000 picocuries per liter. Between 2,000 and 10,000 picocuries per liter, treatment may be advisable when indoor air radon is also elevated.
Is aeration or carbon better for radon?
NHDES considers whole-house aeration the preferred treatment, especially at higher levels, because it removes radon without concentrating radioactivity indoors. Granular activated carbon can work at lower levels when placement and disposal are handled correctly.
Does a carbon filter for radon need special handling?
Yes. A carbon filter concentrates radon as it works, so the media is changed every one to two years and a contractor manages its placement and disposal to keep radioactivity from building up.
Should I test my indoor air for radon too?
It is a good idea. Radon in water adds to radon in air, so testing both gives a complete picture and lets the water system and any air mitigation work together.
Start with a free in-home water test
A licensed local contractor will test your water, explain the results, and give you a written quote. No obligation.