Government groundwater sampling in Monterey County's aquifer recorded radon-222 in all 55 samples taken from 50 different wells between late 2012 and early 2013. The reported radon levels ranged from 158 to 2300 pCi/L, with a median of 490 pCi/L. None of these results exceeded federal thresholds.
If you want to rule out other causes before considering radon testing
Start with basic observations and inexpensive checks such as inspecting water clarity and odor, and verifying your household water equipment’s current condition. None of these will confirm radon presence, but they help exclude other potential water-quality issues that might mimic or contribute to perceived problems.
If you have not yet tested your household water for radon specifically
The definitive way to determine radon concentration in your water is to order a test from a certified laboratory. This test measures radon-222 activity in units of picocuries per liter (pCi/L), showing how much radon gas is dissolved in the water. Results typically include a numeric value indicating radon activity and may compare this value to federal guidelines to aid interpretation.
If you want to understand the scope and confidence level behind the government data
The US Geological Survey collected 55 samples from 50 wells, ranging in depth from 24 to 700 feet. These samples represent the regional aquifer but do not reflect any individual well’s radon concentration. Due to natural geological variability, radon levels can vary widely from well to well; a smaller personal test sample is necessary to establish your household water’s radon level accurately.
If the problem identified is persistent radon levels exceeding your household’s capacity to reduce it
The Fleck Radon in Water Filter is documented to reduce radon gas dissolved in water effectively. This system ships ready to configure within your water supply setup and employs technology specifically designed to treat radon, complementing or surpassing the capacity of existing equipment that struggles to keep up.
If you need context for the government’s radon range relative to regulation
The federal standard for radon in water sets a threshold above which treatment is recommended to reduce exposure. Sampling in Monterey County found radon well below or near these levels, reflecting typical aquifer conditions. It is important to note that detection alone does not indicate a violation or unsafe condition; individual testing determines if treatment is warranted based on your specific water supply.
To resolve uncertainty about your household water radon level, order a radon test from a certified laboratory. A result exceeding federal guidance will confirm the need for treatment, helping you decide if the Fleck Radon in Water Filter is the appropriate solution to manage radon in your home’s water supply effectively.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2013-04-25. 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 aquifer (Monterey County): 55 results from 50 wells, median 490.0 pCi/L, range 158.0-2300.0 pCi/L; none above any federal threshold
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