Pentair Uranium & Radium System

Buy Now

View full details

What a Certified Laboratory Test for Uranium-Radium Reports and How to Read It

Alpha Particle Activity Measurements

Laboratory testing for uranium and radium commonly reports the alpha particle activity in water, measured in picoCuries per liter (pCi/L). These results represent the combined alpha radiation emitted by uranium and radium isotopes present in your water sample. A detailed lab report specifies this numeric value, which helps understand the radioactivity level but does not alone determine water safety.

Range, Median, and Detection Limits

Test reports often include the range of measurements and median values for multiple samples. For De Witt County's 110QRNR aquifer, government sampling found alpha particle levels ranging from 2.9 to 9.9 pCi/L among 18 samples collected from 9 wells. These values are all below federal thresholds. Detection means the presence of alpha-emitting elements, not a compliance failure or unsafe water indication.

Why Aesthetic Secondary Standards Differ from Health-Based Limits for Uranium-Radium

Understanding Aesthetic vs. Health Standards

Secondary standards address factors like taste, appearance, and staining. However, uranium and radium presence is primarily evaluated using health-based guidelines, focused on limiting radioactivity exposure. The federal thresholds mentioned are health-based limits designed to prevent chronic exposure risks. Detected alpha particle activity below these thresholds does not imply aesthetic issues nor health concerns.

Area Sampling Shows No Federal Exceedances

In De Witt County, the alpha particle measurements in local wells stayed below all federal limits, meaning no health-based violations were recorded for this constituent in the sampled aquifer. This distinction shows the importance of relying on health standards rather than aesthetic secondary standards when evaluating uranium-radium presence.

What Happens When Uranium-Radium Is Left Untreated for Years

Potential Long-Term Exposure Considerations

Prolonged intake of water containing uranium and radium above recommended levels can lead to accumulation of radioactive materials in the body, which is associated with increased health risks over decades. However, the sampled wells in the De Witt County aquifer 110QRNR did not exceed federal health limits, indicating that long-term risks are controlled at the area level.

Testing Your Own Water Is Essential

Because government sampling covers regional aquifers but not individual wells, homeowners should obtain certified laboratory testing of their own water to establish specific uranium and radium levels before deciding on treatment needs.

How Many Samples and Wells Stand Behind the Area’s Uranium-Radium Figures

Sample Size and Depth

The U.S. Geological Survey collected 18 alpha particle results from 9 different wells in De Witt County’s 110QRNR aquifer from June to August 2018. These wells ranged in depth from 234 to 365 feet. While this offers a clear regional picture, the limited number of wells sampled means results might not represent variations in individual household wells.

Interpreting Area Data

Small sample sizes provide useful but not definitive information about each homeowner’s water. Results offer a statistical view but cannot replace testing of a specific well.

What Distinguishes Uranium-Radium from Other Common Water Problems

Radioactive Elements vs. Conventional Contaminants

Uranium and radium are naturally occurring radioactive substances measured by alpha particle activity. This differs from chemical contaminants or microbial pathogens commonly tested in water. Treatment approaches and health concerns vary accordingly.

Confusing Uranium-Radium with Radon or Other Radioactivity

Radon is a gas commonly discussed in water but is not measured via alpha particle activity in the same way as uranium and radium. Understanding these distinctions is important when reviewing test results and treatment options.

How Water Treated by the Pentair Uranium & Radium System Differs at the Tap

Reduction of Alpha Particle Activity

The Pentair Uranium & Radium System is designed to reduce uranium and radium content in household water, lowering alpha particle activity and decreasing radioactive element concentrations. This changes the water quality at the tap by targeting these specific contaminants.

Grain Capacity and System Performance

With a grain capacity of 32,000, the Pentair System can handle significant uranium and radium loads before media replacement is needed, making it suitable for many residential applications in De Witt County where detected levels are moderate.

What You Should Not Conclude from Area Data

Area Sampling Is Not a Sure Guide to Your Well’s Water

Government sampling reflects conditions in a regional aquifer but cannot determine the exact uranium and radium levels in your household well. Individual well testing is necessary for accurate information.

Detection Is Not a Violation or Unsafe Water

The detection of alpha particle activity within the measured range means the presence of uranium and radium but does not mean your water is unsafe or exceeds legal limits. No samples in the De Witt County aquifer were found above federal thresholds.

Secondary Standards Do Not Imply Health Risk

The aesthetic secondary standards differ from health-based limits and should not be confused with safety indicators. The federal health limits remain the proper benchmark for uranium-radium concerns.

Where this information comes from

Source: USGS groundwater sampling. Sampled 2018-08-01. 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 110QRNR aquifer (De Witt County): 18 results from 9 wells, median 4.35 pCi/L, range 2.9-9.9 pCi/L; none above any federal threshold