Interpreting median and range values for uranium in your water report
A laboratory test report for uranium typically lists a concentration in micrograms per liter (ug/L). For example, data from U.S. Geological Survey groundwater sampling in Lancaster County's aquifer 111ALVM, collected between September 2012 and March 2013 from 38 wells, shows a median uranium concentration of 10.0 ug/L, with individual results ranging from 3.0 to 19.0 ug/L. This means half the samples measured values above 10.0 ug/L and half below, within the reported range. The presence of uranium was detected in 142 out of 150 results, and none exceeded federal safety thresholds. When reviewing your own water test, understanding where your result fits relative to this median and range can provide context before choosing a treatment path.
If you want to prioritize checks before laboratory testing for uranium or radium
Start by confirming your water source characteristics and well depth. Nearby samples in this county involved wells 2 to 24 feet deep; deeper or different well construction may influence uranium presence. Next, evaluate any visible signs such as discoloration or staining, though these are not specific indicators of uranium or radium. After these initial observations, obtaining an accurate laboratory test of your specific water supply for uranium and radium concentrations is essential because regional data alone cannot determine your water’s exact quality. This sequence helps avoid unnecessary expense and guides an informed decision between treatment technologies.
If you observe household water symptoms that suggest or exclude uranium and radium issues
Uranium and radium typically do not affect water taste, odor, or appearance directly, so lack of these symptoms does not exclude their presence. Conversely, staining or metallic tastes often relate to other minerals, not uranium or radium. Health concerns linked to uranium contamination focus on long-term exposure, emphasizing the importance of testing rather than relying on sensory cues. Recognizing what symptoms are unlikely to be caused by uranium or radium helps narrow down the problem and investment in treatment options.
If you need to understand what public water system records mean compared to private well testing
Public water system records provide data aggregated over time from many samples, showing an area-wide picture rather than specific household conditions. In Lancaster County, no federal safety thresholds for uranium were exceeded in sampled wells, indicating general compliance for the region’s aquifer 111ALVM. However, private well water can vary widely due to local geology and well construction, making individual testing indispensable. Public records help frame the likelihood and typical range of uranium levels but cannot replace personal water analysis.
If you want to know what the measured uranium range means regarding federal standards and limitations
The federal maximum contaminant level (MCL) for uranium in drinking water is set to protect health. The U.S. Geological Survey data for Lancaster County’s aquifer 111ALVM showed all tested wells falling below the federal threshold, meaning no sampled water exceeded what regulators consider safe for health. Detected uranium presence within this range is not a violation, nor an immediate indication of risk, but rather a background level to be aware of. Understanding this distinction helps prevent overestimating the urgency of treatment solely based on detection.
If you are curious about the significance of sample size and well count behind the data
The uranium concentration figures come from 150 samples taken from 38 wells, spread over a seven-month period. This dataset offers a snapshot of groundwater quality within the aquifer 111ALVM but may not capture every local variation. A small number of wells or samples might miss isolated high or low values. The current sampling offers a reasonably broad regional insight but underscores why individual homeowners should conduct their own specific tests to inform choices. Larger, repeated sampling improves confidence in the representativeness of data.
To address uranium and radium in home water, the Fleck Uranium & Radium System ships ready to configure and offers a documented treatment capacity of 32,000 grains, representing a technical solution designed according to water quality needs. Its application depends on confirmed laboratory analysis of your water and an understanding of the regional context provided here.
These figures and information come from U.S. Geological Survey groundwater sampling in Lancaster County aquifer 111ALVM, accessible at https://waterdata.usgs.gov/monitoring-location/395931076154602/. This source provides comprehensive area data to inform your water quality decisions.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2013-03-27. 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 111ALVM aquifer (Lancaster County): 150 results from 38 wells, median 10.0 ug/L, range 3.0-19.0 ug/L; none above any federal threshold
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