How Treated Water Differs at the Tap After Using the Pentair Uranium & Radium System
The underground aquifer feeding many wells in Arizona contains trace amounts of uranium and radium, naturally occurring elements that can be measured in groundwater. When using the Pentair Uranium & Radium System, water drawn from these sources undergoes a filtering process that reduces these elements. This system ships ready to configure for residential use, providing a high grain capacity of 32,000 grains before replacement is needed, ensuring extended operational time.
After water passes through this system, the concentrations of uranium and radium reaching your household taps are substantially lowered compared to untreated water. This means less exposure to these elements in daily water use, helping maintain water quality consistent with your household's health and aesthetic preferences.
A Worked Example: Interpreting the Median and Range of Radium-224 in Area-Wide Sampling
U.S. Geological Survey data from 21 separate wells sampled between 2013 and 2018 in an Arizona aquifer show radium-224 levels ranging from -0.09 to 0.71 picocuries per liter (pCi/L), with a median value of 0.22 pCi/L. These results mean that half the samples had radium-224 below 0.22 pCi/L and half above, within the detected range.
Negative values in the data represent readings below the detection limit and do not indicate presence of radium. Importantly, none of the samples exceeded any federal threshold for radium-224. As a homeowner, you can view these numbers as an indicator of natural variability in radium levels across wells in the aquifer but cannot determine your own water’s exact radium concentration without specific testing of your well.
Number of Samples and Wells Behind These Figures and the Impact of Limited Data
The uranium-radium data for the Arizona aquifer is based on 21 water samples taken from 21 distinct wells over a five-year span. This sample size offers a reasonable snapshot of regional groundwater quality but does not capture all possible fluctuations or represent all wells in the area.
Smaller data sets mean there is more uncertainty regarding the full range of radium levels that could occur in any given well. Therefore, these figures provide valuable context but should not be relied upon as definitive for an individual household without conducting a personal water analysis.
Differences Between Public-System Records and Private-Well Testing in What They Establish
Public water system monitoring in Arizona typically involves frequent sampling of combined water sources and must meet regulatory standards. These results reflect the average quality of water delivered to many homes. In contrast, private well testing is specific to a single point and reveals the unique water characteristics of that household’s source.
Area-wide public data, such as the USGS aquifer samples, provide trend information but do not substitute for private well testing. To understand your own water composition and decide on treatment needs, having a current test result from your own well is essential, especially if equipment previously managing uranium-radium has failed.
Why Aesthetic Secondary Standards Differ from Health-Based Limits for Radium
Radium measurements are subject to health-based federal limits designed to protect against long-term exposure risks. Secondary aesthetic standards, while important for taste, discoloration, or staining, do not define health safety levels.
In the case of the Arizona aquifer radium-224 data, none of the samples violated health-related thresholds. This distinction helps households understand that detectable radium is not inherently unsafe, but ongoing monitoring and appropriate treatment remain prudent when dealing with naturally occurring radioactive elements.
What You Should Not Conclude from Area Data About Your Household Water
While the USGS sampling offers useful insight into typical uranium and radium levels in the regional aquifer, it does not provide specific information about your household well. Detection in these samples indicates the presence of radium but does not mean your water is above or below any regulatory limit.
Failure of existing equipment used to manage uranium and radium underscores the need for testing your well water directly to verify current conditions. The Pentair Uranium & Radium System is designed to address these elements effectively and can be purchased directly to reestablish control over water quality in your home.
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 Radium-224 in the aquifer (FIPS ): 21 results from 21 wells, median 0.22 pCi/L, range -0.09-0.71 pCi/L; none above any federal threshold