What does the median and range of radon results mean for my home water?
The U.S. Geological Survey tested eight wells in Dorchester County tapping into aquifer 124PNPN, each between 402 and 568 feet deep, from 2011 through mid-2012. The radon-222 results consistently found radon in all sampled wells, with a median level of 325.0 pCi/L and observed values ranging from 196.0 to 720.0 pCi/L. This means half of the measurements were above 325.0 pCi/L, and the highest was 720.0 pCi/L. These numbers describe the groundwater in this area generally sampled, not the water from your specific well or tap. Your water could have a different radon concentration; only a test on your household water can confirm that.
How can I determine if a radon treatment system meets my household’s daily needs?
When considering treatment for radon in water, it is important to match the system’s capacity with your household’s water usage. A typical family’s daily water demand varies but can be estimated based on the number of occupants and water use habits. The documented C-Series Radon in Water Filter system is designed to handle residential water demands by reducing radon concentration to acceptable levels within typical flow ranges. Evaluating your average daily water consumption and peak flow rates helps ensure that the filtration system’s performance aligns with your household’s needs.
How is public-system radon data different from private well testing for my home?
The radon data from the U.S. Geological Survey reflects multiple wells sampled within Dorchester County’s aquifer 124PNPN, providing area-wide groundwater characteristics over a set time frame. This regional data shows what radon levels were present in the aquifer at the time but does not directly infer the radon concentration in your private well or tap water. Only a specific laboratory test performed on water from your home can establish your water’s exact radon content. Public water systems may have their own monitoring records, but these do not replace private well testing for individual households.
Does the age or material of my household plumbing affect radon levels?
Radon is a naturally occurring radioactive gas that dissolves in groundwater before it reaches your household plumbing. The concentration of radon in your water depends mainly on the source water, not on the plumbing materials or the age of your pipes. While plumbing condition can influence other water quality factors such as corrosion or taste, it does not create or increase radon content. Therefore, plumbing materials and age are separate concerns from radon levels that originate in your water supply.
Why do aesthetic secondary standards differ from federal health-based limits for radon?
Radon in water is regulated with health-based standards to reduce potential risk from ingestion and inhalation when water is used. The federal guidelines set thresholds for radon levels that consider health impact rather than taste, staining, or odor which are covered by aesthetic secondary standards for other water constituents. In Dorchester County’s sampled wells, none of the radon results exceeded any federal health-based thresholds. It is important to understand that detected levels do not automatically indicate a violation or pose an immediate safety concern, but they help guide decisions about treatment and testing.
What test should I order to know if radon is a concern in my water?
To determine if radon is an issue in your household water, order a laboratory test specifically measuring radon-222 in a sample taken directly from your water source—ideally the cold water tap used for drinking or cooking. This test will provide the exact concentration of radon in your water. If the result indicates elevated radon levels, a system such as the C-Series Radon in Water Filter ships ready to configure and can reduce radon effectively. Armed with this test result, you can confidently decide on the next steps to address water radon concerns based on your actual household data.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2012-07-26. 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 124PNPN aquifer (Dorchester County): 8 results from 8 wells, median 325.0 pCi/L, range 196.0-720.0 pCi/L; none above any federal threshold