Uranium-Radium in San Bernardino County Aquifer: Sampling Data and Household Checklist

U.S. Geological Survey groundwater sampling in the San Bernardino County aquifer found alpha particle activity — an indicator related to uranium and radium presence — detected in all 86 samples from 38 wells, with a median concentration of 5.55 pCi/L and a range from -0.3 to 37.0 pCi/L. None exceeded federal thresholds for safety during the sampling period from 2011 to 2022.

1. Sample Size, Depth, and Interpretation

Number of Wells Sampled

The data comes from 38 separate wells, providing a broad overview rather than specifics about any one household.

Number of Samples Collected

A total of 86 samples were collected, reflecting multiple tests from some wells over several years.

Range of Well Depths

Sampled wells ranged from 88 to 1,390 feet deep, showing alpha particle readings can vary by depth.

Implications of Sample Size

This relatively extensive sampling gives a general sense of uranium and radium levels in local groundwater but cannot pinpoint the concentration in any particular home’s water.

2. What to Record Before Seeking Treatment Advice

Have a Recent Water Quality Report

Obtain a current water test specific to your household supply measuring uranium and radium or alpha particle activity to understand your water’s condition.

Note Your Well or Water Source Details

Document the depth of your water source and the system type supplying your home.

Record Any Relevant History

Include any known changes in water taste, staining, or plumbing issues that may be associated with water quality.

3. Plumbing Materials and Age Considerations

Separate Plumbing Influence from Source Water

The presence of uranium and radium relates to source water quality, not the type or age of plumbing, which typically does not contribute to alpha particle activity.

Check for Corrosion

Older plumbing may corrode, but this influences metals like lead or copper, not uranium or radium.

4. Changes in Household Water After Treatment

Reduction of Uranium and Radium

Systems like the Fleck Uranium & Radium System with a grain capacity of 32,000 provide treatment that reduces uranium and radium related activity, improving water quality at the tap.

Impact on Water Appearance and Taste

Effective treatment can improve water clarity and reduce potential staining without affecting beneficial minerals.

Maintenance of Flow and Pressure

The Fleck System ships ready to configure and supports consistent household water flow with proper care.

5. Potential Consequences of Untreated Uranium-Radium Presence

Long-Term Accumulation in Home Water

Without treatment, uranium and radium related particles remain present, with effects varying by individual water usage and source concentration.

Possible Impact on Plumbing

These elements do not typically cause corrosion or buildup affecting plumbing systems.

Importance of Monitoring

Regular testing helps observe any changes over time that might warrant action.

Final Recommendation

Arrange a test of your household water specifically for uranium and radium or alpha particle activity. This direct measurement will clarify your home's water condition and inform if treatment with a Fleck Uranium & Radium System is appropriate.

Where this information comes from

Source: USGS groundwater sampling. Sampled 2022-05-02. 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 Alpha particle in the aquifer (San Bernardino County): 86 results from 38 wells, median 5.55 pCi/L, range -0.3-37.0 pCi/L; none above any federal threshold