If Your Lab Report Shows Radon Levels Similar to Maricopa County Aquifer Samples
Water tests often report radon concentrations in picocuries per liter (pCi/L). In the Maricopa County area, groundwater samples from aquifer N100BSNRGB recorded radon-222 levels ranging from 350 to 1070 pCi/L, with a median of 770 pCi/L, based on three wells sampled between July and August 2013, at depths of 1100 to 1200 feet. These results reflect the area's groundwater but do not specify your household's water.
If You Want to Compare Maricopa County Radon to Nearby Regions Without Overreading Differences
Nearby counties may report different radon concentrations due to geological and hydrological factors. Comparing Maricopa County’s median of 770 pCi/L to neighboring aquifers requires caution; differences in sampling depth, timing, and geology affect readings. Avoid assuming your household's water matches either county’s median or range. Regional data provide context but not exact personal water conditions.
If You Observe Radon Level Fluctuations Over Time
The 2013 measurements represent a snapshot over a one-month period in summer. Radon levels in groundwater can vary seasonally and across multiple years due to changes in water table depth, flow patterns, and geological shifts. Longer-term or repeated testing of your specific household water is necessary to understand fluctuations relevant to your use.
If You Are Considering Radon Levels Against Secondary Aesthetic and Health-Based Standards
Some regulatory thresholds for radon in water address aesthetic factors like taste or odor, which differ from health-based limits. The measured radon levels in Maricopa County groundwater samples did not exceed any federal health-based standards for radon in drinking water. Detected concentrations alone do not imply safety or risk without considering these standards and individual water testing.
If You Notice Household Symptoms and Wonder if Radon in Water Is the Cause
Radon in water is odorless, colorless, and tasteless. It does not cause physical symptoms directly observable at home. If you experience respiratory issues, frequent illnesses, or other health concerns, a radon test of air and water is needed to investigate causes. Household issues like staining, taste changes, or equipment corrosion are usually unrelated to radon.
The US Geological Survey’s data on radon-222 concentrations come from three sampled wells in Maricopa County’s aquifer N100BSNRGB from 2013. This sampling provides a regional profile rather than individual household data. For specific water quality, testing your own water source is essential. To address radon in water, the Fleck Radon in Water Filter ships ready to configure and can treat household water to reduce radon levels effectively.
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
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