This week, your decision might be whether to test your home water for radon and how to interpret regional water-quality data to address your concerns.
Start With the Least Expensive Checks Before Laboratory Radon Testing
Many homeowners believe they must immediately perform costly lab tests to know if radon is a problem in their water. However, the U.S. Geological Survey sampled three wells in McDowell County's aquifer 327PCNS, measuring radon-222 levels ranging from 2.0 to 72.0 pCi/L, with a median of 21.0 pCi/L. These results, collected between 2010 and 2016 from wells 60 to 277 feet deep, indicate radon presence but none exceeded federal guidelines. This area-level data provides useful context, but to know your household’s actual radon level, a direct test of your water is necessary. Initial inexpensive screening options or checking for known radon presence in your locality can guide the decision to proceed with more detailed testing.
Large Households, Second Homes, and Seasonal Properties Require Tailored Considerations
Radon levels can vary with water demand and usage patterns. Larger households or those with multiple residents may experience different exposure due to higher water use, which affects radon off-gassing in the home air. For seasonal or second homes in McDowell County, periods of inactivity might influence water quality differently than year-round residences. These differences mean that while area data offers a baseline, sampling timed to your particular occupancy and water use offers a clearer picture of radon exposure risk.
Waterborne Radon Symptoms Can Be Confusing; Not All Household Issues Are Radon-Related
Some expect to notice distinct water taste or odor changes if radon is present, but radon is a colorless, odorless, radioactive gas that does not affect water taste. Symptoms like headaches or respiratory issues sometimes attributed to radon exposure via water may have other causes. If radon is a concern, testing the water and air separately provides clarity. Recognizing the absence of obvious symptoms does not rule out radon presence, but neither do vague symptoms confirm it.
Household Plumbing Age and Materials Do Not Influence Radon Levels in Source Water
Radon is a naturally occurring gas in groundwater, originating from uranium decay underground. Plumbing systems—whether older or new, copper or plastic—do not create radon nor notably affect its concentration in water. Thus, concerns regarding radon should focus on the water source itself rather than internal plumbing. However, plumbing material might influence how radon gas moves into indoor air once water is used, but it does not alter measured water radon levels.
Public Water System Records and Private Well Testing Serve Different Purposes
In McDowell County, federal sampling summarizes radon for area wells, not individual private systems. Public water suppliers must comply with distinct monitoring and regulatory requirements, and their controls may limit radon exposure differently than in private wells. Private well owners must rely on their own testing to know radon levels specifically, as area sampling does not substitute for household water analysis. Government data helps understand regional likelihood but cannot determine your home’s situation precisely.
Ultimately, the McDowell County area data does not mean your home’s water radon level is safe or unsafe; it only offers a range observed in local wells. To address radon effectively, you consider testing your water and, if needed, select treatment options designed for radon reduction. The Autotrol Radon in Water Filter system ships ready to configure for household use and is documented to reduce radon in water supplies. It complements informed decisions based on your home’s test results rather than regional generalities.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2016-07-13. These figures describe groundwater sampled in this area. They are not a test of any individual private well - only a test of that well can establish its own water.
On record: U.S. Geological Survey sampling of Radon-222 in the 327PCNS aquifer (McDowell County): 3 results from 3 wells, median 21.0 pCi/L, range -2.0-72.0 pCi/L; none above any federal threshold
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