Step 1: Evaluate Your Plumbing Materials and Age Separate from Source Water
Before considering water source radon levels, examine the plumbing in your home. Radon gas in water can transfer to indoor air primarily during water use, but the age and materials of your pipes do not produce radon. They may influence how radon moves through your system but are distinct from radon originating in groundwater. Knowing your plumbing setup helps separate where radon exposure might come from.
Step 2: Interpreting Median and Range of Radon Results from Richmond County Aquifer 211MDVL
Government sampling of 10 wells in Richmond County's aquifer 211MDVL between 2013 and 2025 shows radon-222 concentrations detected in all 23 samples. The median radon level was 201.0 picocuries per liter (pCi/L), with values ranging from 27.0 to 253.0 pCi/L. These numbers reflect measurements taken from wells 200 to 455 feet deep and represent an area-wide picture; they do not specify your household's water radon level. Notably, none of these results exceeded federal radon thresholds for water, indicating the area record does not show levels above the health-based limits set by authorities.
Step 3: Distinguishing Public System Records from Private Well Testing
The data used here come from sampled wells in the region and indicate general groundwater radon presence. Public water systems often maintain separate radon monitoring, and their records may differ because they treat or blend multiple sources. Private wells, in contrast, can have individual radon concentrations that vary widely even within the same aquifer. To understand your home's specific water radon level, you need a test of your own water supply rather than relying solely on area-wide or public system data.
Step 4: Household Signs Commonly Mistaken for Radon Issues
Some household conditions lead people to suspect radon in water, such as a musty odor or mineral stains. However, radon is a colorless, odorless gas and does not cause such visible or sensory signs. If you notice odd tastes, discoloration, or staining, these typically stem from other water quality factors unrelated to radon. Therefore, the presence or absence of these signs does not confirm or rule out radon in your water.
Step 5: Understanding How Aesthetic Secondary Standards Differ from Health-Based Limits for Radon
Government agencies set health-based limits for radon in water focusing on potential risks from exposure. There are also secondary standards addressing aesthetic factors like taste or staining, but these do not apply to radon since it is odorless and tasteless. Hence, exceedance of aesthetic criteria is not a concern with radon. When assessing radon, it's important to focus on health-based guidelines, not secondary aesthetic thresholds, which do not relate to radon.
Final Note: The radon concentrations reported for Richmond County’s aquifer 211MDVL provide a general understanding of groundwater radon presence in this area but should not be taken as specific to your well or household water. Only a direct test of your water source can determine the radon level you face. If confirmed at elevated levels, devices such as the C-Series Radon in Water Filter ship ready to configure and can reduce radon in residential water supplies.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2025-07-10. 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 211MDVL aquifer (Richmond County): 23 results from 10 wells, median 201.0 pCi/L, range 27.0-253.0 pCi/L; none above any federal threshold