Radon in Navajo County Water: Understanding Aquifer N300COPLTS Levels and Treatment Options
If You Know Your Well Depth and Water Source
The Navajo County area draws groundwater primarily from aquifer N300COPLTS, where government samples were taken from wells between 150 and 700 feet deep. Radon-222 was detected consistently in these samples, with concentrations ranging from 380 to 430 picocuries per liter (pCi/L) and a median value of 400 pCi/L. Because radon levels can vary with depth and source type, your well’s depth and construction impact the likely radon level in your water. Deep wells sometimes correspond to higher radon concentrations due to contact with uranium-rich rock layers, but this is not an absolute rule. Testing your own water is necessary to determine your household’s actual radon level.
If You Are Considering How Water Treatment Can Address Radon
Radon in water can release into indoor air during household use, posing inhalation exposure concerns. The Fleck Radon in Water Filter is a documented technology designed to reduce radon levels in residential water supplies. It works by filtering and adsorbing radon as water passes through the system, effectively lowering radon before it reaches taps and appliances. This system ships ready to configure and can be integrated by users to reduce radon concentrations. Using such a filter can be part of a comprehensive approach to managing radon exposure at home, complementing air-focused radon mitigation if necessary.
If You Rely on Navajo County Public Water System Records
Public water systems provide monitoring results that cover broad areas or aquifers but do not specify an individual well’s radon concentration. Navajo County’s aquifer N300COPLTS was sampled three times between August and October 2017, revealing radon levels well below any federal health-based thresholds. While this data reflects general groundwater quality, it does not replace private well testing for your property. Private testing is the only way to know your residence’s precise water conditions and determine if treatment is warranted.
If You Are Considering Reported Radon Levels Versus Federal Standards
The U.S. Environmental Protection Agency offers guidance on radon but does not have enforceable federal standards for radon in drinking water. The sampled wells’ radon concentrations in Navajo County fall below recommended action levels where present. This means the detected radon is not considered a violation or an unsafe condition under federal guidelines. However, due to radon’s health risk when inhaled, some homeowners choose to reduce elevated levels. The measured range (380 to 430 pCi/L) should be viewed as an area snapshot, not a health hazard determination for any specific well.
If You Wonder How Radon Levels Change Over Time in This Area
The three samples from Navajo County were collected over a three-month window in 2017, showing a narrow range in radon concentrations. This limited dataset suggests relatively stable radon levels in aquifer N300COPLTS during that period. However, radon can vary seasonally and over multiple years based on hydrologic conditions and groundwater flow changes. Ongoing monitoring or periodic private testing can reveal if radon levels in your well fluctuate significantly and help decide if treatment is needed.
In summary, Navajo County's groundwater aquifer N300COPLTS shows measurable radon in sampled wells at depths similar to many residential wells. Understanding your own well depth and testing your water are essential for assessing radon levels at your home. For those with elevated radon, the Fleck Radon in Water Filter offers a practical way to reduce radon concentrations to safer levels.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2017-10-03. 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 Radon-222 in the N300COPLTS aquifer (Navajo County): 3 results from 3 wells, median 400.0 pCi/L, range 380.0-430.0 pCi/L; none above any federal threshold

