Understanding Uranium-Radium in Rockingham County Groundwater: What Homeowners Should Know

What are typical uranium and radium levels found in Rockingham County bedrock groundwater?

Government groundwater sampling carried out by the U.S. Geological Survey from 2011 through 2021 collected 82 uranium concentration results from 29 separate bedrock wells in Rockingham County. These wells were 150 to 900 feet deep, representing the aquifer system in this area. The median uranium concentration recorded was approximately 1.007 micrograms per liter (ug/L), with measurements ranging from 0.06 to 210.0 ug/L. Radium data were not specifically reported in this set. Importantly, none of these results exceeded any federal uranium thresholds. This data provides a regional picture rather than specifics about any one well.

How should I interpret terms like 'detected,' 'median,' and 'range' in these water quality results?

The term 'detected' means that the measurement instrument found some concentration of uranium in the water sample, but this does not imply any violation or unsafe level. In this dataset, uranium was detected in 68 of the 82 samples. The 'median' is the middle value of all measured concentrations, showing a typical level in the sampled wells—in this case, just over 1 ug/L. The 'range' shows the lowest and highest values recorded across all samples, illustrating variation rather than any norm. These terms help characterize the spread of uranium concentrations in bedrock groundwater across Rockingham County, but they do not define the safety or condition of any individual household’s water.

What are potential consequences of leaving uranium-radium in groundwater untreated over time?

Long-term presence of uranium and radium in drinking water, when concentrations are elevated, can contribute to buildup of radioactive materials and heavy metals. Although the Rockingham County regional data does not show exceedances of federal limits, individuals with well water should consider that untreated uranium and radium may, over years, affect water quality attributes and potentially impact health depending on levels. Persistent uranium and radium in water can contribute to staining, taste changes, and may require attention due to their radiological properties and chemical behavior.

How do sample depth, well depth, or source type influence what uranium or radium levels I might find?

Within Rockingham County’s bedrock aquifer system, deeper wells tend to access water with a wider range of uranium concentrations. The sampled wells ranged from 150 to 900 feet deep, showing variable uranium levels. Typically, bedrock wells may have different uranium and radium profiles compared to shallower aquifers or surface water sources due to rock mineral content and groundwater flow. Therefore, the depth and geological conditions of your well influence what levels you might encounter, underscoring the need for a specific water test to determine your household’s water quality.

What will a certified laboratory test report for uranium and radium show, and how should I read it?

A certified lab report for uranium and radium concentrations will present numeric values expressed in micrograms per liter (ug/L) for uranium, and picocuries per liter (pCi/L) or similar units for radium, depending on the test. The report will indicate whether each constituent was detected and provide the concentration measured. Reading the report involves comparing these numbers to federal or state guidelines to understand if treatment is advisable. Because regional sampling shows a wide range with no federal exceedances, testing your own well water is essential to know if your household water requires treatment.

For those considering treatment, the Pentair Uranium & Radium System offers a documented solution designed to address uranium and radium removal, featuring a 32,000-grain capacity to handle contaminant reduction effectively. It ships ready to configure and can be integrated to treat residential water supply after confirming individual water conditions through testing.

In summary, Rockingham County bedrock aquifer sampling shows variable uranium levels without federal threshold exceedances. Homeowners should obtain a certified laboratory test of their own water to identify specific uranium or radium concentrations and decide if treatment like the Pentair Uranium & Radium System is appropriate for their needs.

Where this information comes from

Source: USGS groundwater sampling. Sampled 2021-12-30. 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 Uranium in the BEDROCK aquifer (Rockingham County): 82 results from 29 wells, median 1.007 ug/L, range 0.06-210.0 ug/L; none above any federal threshold