Radon in Maricopa County Water: Deciding Treatment for Aquifer N100BSNRGB

Water delivered to homes in Maricopa County often comes from deep wells tapping into the N100BSNRGB aquifer. Groundwater travels from underground rock layers to the household tap, bringing with it natural elements that can include radon gas. Understanding how radon appears in local water and selecting the right technology to reduce it can help households make informed choices.

If you want to know how treated water differs at the tap

When water passes through the Autotrol Radon in Water Filter, radon levels can be reduced. This system uses filtration technology designed specifically to address radon dissolved in water. As a result, water exiting the filter tends to have lower radon levels than untreated well water, improving water quality at the point of use. It is important to recognize that the effectiveness depends on the specific radon concentration in your water, which only testing of your own source can reveal.

If you want to understand how aesthetic secondary standards differ from health-based limits for radon

Radon in water is subject to measurements that help identify concentrations but does not have an established federal maximum contaminant level (MCL) for health effects through water ingestion. Regulations related to radon typically focus on air exposures rather than water. Some secondary standards consider radon’s impact on taste, odor, or corrosion indirectly, but these are not health limits. The presence of radon detected in regional water samples does not in itself indicate a health risk or a legal violation.

If you want to know how radon enters groundwater in Maricopa County’s N100BSNRGB aquifer

Radon-222 originates naturally from the radioactive decay of uranium in underground rock formations. In Maricopa County’s N100BSNRGB aquifer, groundwater drawn from depths of around 1100 to 1200 feet carries radon measured at median levels of 770 pCi/L, with a range from 350 to 1070 pCi/L recorded in three wells sampled during summer 2013 by the U.S. Geological Survey. These numbers describe the water in the aquifer at large and do not substitute for testing of an individual household well.

If you want to understand the impact of plumbing material and age, separate from the source water

While radon enters water through natural geological processes, the plumbing system within a residence can influence how water quality changes before it reaches taps. Older pipes or certain materials may interact with water chemistry but do not generate or eliminate radon gas themselves. Radon’s presence in tap water is primarily a function of the source water’s characteristics rather than the plumbing infrastructure.

If you want to prepare information before seeking treatment advice

• Obtain a certified laboratory test report of radon concentration specific to your household water supply.
• Note the depth and location of your well relative to regional aquifer data.
• Record daily water usage to assess treatment system sizing needs accurately.
• Identify any existing water treatment devices currently in use.

If you want to understand terms like 'detected', 'median', and 'range' in the sampling record

In the U.S. Geological Survey sampling of Maricopa County’s N100BSNRGB aquifer, 'detected' means radon was measured above the instrument's reporting limit in each of the three sampled wells. The 'median' value of 770 pCi/L is the middle figure when the three radon measurements are ordered from lowest to highest. The 'range' from 350 to 1070 pCi/L captures the lowest and highest measurements observed. These figures describe general conditions in the aquifer and do not reveal the concentration in any specific household’s supply.

It is essential not to assume that these regional radon levels reflect your well’s water. Only a certified test of your water can establish its radon concentration. Furthermore, detection of radon at these levels in the aquifer does not indicate an exceedance of any federal limits as related to radon in water. The Autotrol Radon in Water Filter ships ready to configure for your household’s specific needs and can be selected once you understand your water’s radon content and daily flow requirements.

Where this information comes from

Source: USGS groundwater sampling. Sampled 2013-08-05. 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 N100BSNRGB aquifer (Maricopa County): 3 results from 3 wells, median 770.0 pCi/L, range 350.0-1070.0 pCi/L; none above any federal threshold