Radon in Allegany County Water: Understanding Local Levels and Treatment Choices

1. Begin with Basic Checks Ruling Out Obvious Sources

The U.S. Geological Survey sampled groundwater from eight wells in Allegany County's 112SDGV aquifer between 2010 and 2021. Radon-222 was detected in all 14 results with concentrations ranging from 300 to 1,270 pCi/L and a median value of 690 pCi/L. None of these measurements surpassed any federal threshold for radon in water. This regional data signals that radon is consistently present but does not specify your well’s radon level. Start by confirming whether your household water source taps into this aquifer or another water source because testing outside this context is generally unnecessary.

2. Record Key Household and Water System Details Before Treatment Considerations

Before considering any treatment, note your water source type, depth of well, and plumbing materials, as these details influence radon presence and removal options. Record your household’s average daily water usage, plumbing age, and any prior water quality reports. Having this information helps clarify if radon originates from groundwater or is affected by indoor air intrusion or plumbing-related factors.

3. Understand the Sampling Size and What It Means for Your Situation

The regional sampling involved 14 results from 8 wells between 70 and 199 feet deep. While this offers a solid overview of groundwater radon presence in the area, individual well concentrations can vary significantly. The modest sample size and well depths highlight the importance of a site-specific water test to precisely determine your household's radon level rather than relying solely on regional data.

4. Recognize Plumbing Influence on Radon Levels Separate from Source Water

Radon can enter your water system through the groundwater or be influenced by plumbing components and the house’s ventilation. Old or deteriorating pipes do not affect radon concentration in water itself but may influence how radon gas escapes into indoor air. Plumbing age and materials are important for overall water quality but do not directly alter radon levels measured in your water sample.

5. Match Treatment Capacity with Household Water Demand

If a treatment system is needed, confirm that its capacity aligns with your household’s average and peak water use. Radon removal systems designed for residential settings typically handle common household flow rates but verifying that a chosen system’s capability meets your volume needs ensures effective and consistent radon mitigation.

6. Know How Radon Enters Groundwater in This Region

Radon-222 in Allegany County groundwater results from the radioactive decay of uranium naturally found in soils and rocks of the area. It migrates from geologic formations into the aquifer, causing the measurable concentrations noted by government monitoring. Radon gas dissolves into groundwater over time and can accumulate in wells supplying household water.

Final Step: Order a laboratory test specifically for radon concentration in your household water to obtain your precise level. This test is the only way to determine if treatment is necessary. A result showing radon well below action levels would conclude monitoring, while higher concentrations may warrant considering systems such as the Pentair Radon in Water Filter, which ships ready to configure for point-of-entry treatment.

Where this information comes from

Source: USGS groundwater sampling. Sampled 2021-09-15. 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 112SDGV aquifer (Allegany County): 14 results from 8 wells, median 690.0 pCi/L, range 300.0-1270.0 pCi/L; none above any federal threshold