The U.S. Geological Survey collected groundwater samples from six wells in Fort Bend County’s aquifer 112CHCT area between 2010 and 2015. Radon-222 was detected in all seven samples with a median value of 1,450 picocuries per liter (pCi/L) and a range spanning from 109 to 1,700 pCi/L. No measurements in this set exceeded any federal safety thresholds for radon in water. These figures represent measured values in the sampled wells, not necessarily the water in your household’s well or tap.
What 'Detected', 'Median', and 'Range' Really Mean in Radon Sampling
In the government’s water sampling data, "detected" means the measuring instruments found radon levels above the detection limit in every tested sample. The "median" is the middle value of these measurements, meaning half of the data points were above 1,450 pCi/L and half below. The "range" shows the lowest and highest radon values recorded across all samples—from 109 to 1,700 pCi/L. These terms describe the area-wide data found in sampled wells, not specific household water.
Why Sampling Only from Six Wells Limits What the Data Can Show
The dataset comes from a limited number of wells—just six—and seven samples collected over about five years. Because of this, the figures offer a general sense of radon levels in the aquifer beneath Fort Bend County but do not define conditions for all wells, especially shallower or deeper ones or those in different locations. Your water’s radon concentration needs an independent test to be known.
How Radon Differs From Other Water Concerns You May Hear About
Radon is a naturally occurring radioactive gas that can dissolve into groundwater from surrounding rock. Unlike substances that affect taste or cause staining, radon primarily presents as a potential inhalation risk when released into the air during household water use. This contrasts with chemical or biological water problems that often produce visible or taste-based symptoms. Radon’s presence is invisible and odorless, requiring specific testing to detect.
Signs in Your Home That May or May Not Indicate a Radon Problem
Because radon in water itself has no taste, color, or odor, typical water problems like cloudiness, discoloration, or unusual smells do not point to radon. If your water treatment equipment has stopped working, issues such as reduced water flow or mechanical malfunctions could be causes but are not exclusive indicators of radon presence. Radon’s main health concern relates to air exposure during water use rather than water quality changes visible at the tap.
How Often Should Your Radon Reduction Equipment Be Serviced?
The Autotrol Radon in Water Filter, designed to lessen radon levels, operates with scheduled maintenance to maintain effectiveness. While exact timelines vary depending on water usage and quality, regular monitoring and routine cartridge replacement or system checkups every 6 to 12 months help ensure the equipment continues to reduce radon reliably. The system ships ready to configure for home water lines as a direct purchase product.
Steps to Take Before Testing for Radon in Your Water
First, eliminate other common water issues such as bacterial contamination or mechanical problems with existing equipment, since these are more frequent causes of water concerns. Then, have your water tested by a certified laboratory for radon concentration. Testing is the only reliable way to confirm if radon is present at concerning levels in your home’s water supply.
Ordering a laboratory radon water test will provide a specific measurement from your household water. If the test shows radon levels near or above recommended guidelines, using the Autotrol Radon in Water Filter can be an effective solution to reduce radon in your water supply.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2015-07-07. 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 112CHCT aquifer (Fort Bend County): 7 results from 6 wells, median 1450.0 pCi/L, range 109.0-1700.0 pCi/L; none above any federal threshold
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