Government sampling of wells in the N600CMBPLV aquifer beneath Umatilla County found radon-222 concentrations ranging from 110.0 to 450.0 pCi/L with a median of 203.0 pCi/L in three wells tested in 2016. These results apply to this area and aquifer but do not reveal the radon level in your specific well or tap water. To understand your home's water, you need a certified laboratory test from your own water supply.
Which Fixtures, Appliances, or Processes Are Affected First and Why
Indoor Air Exposure from Showers and Faucets
Radon dissolved in water releases into the air when you use water fixtures, especially showers and faucets. The gas can accumulate indoors, raising airborne radon concentrations. Kitchens and bathrooms are primary areas where waterborne radon escapes.
Water Heaters and Appliances
Water heaters can facilitate radon release into household air as water warms. Appliances using hot water may also increase air exposure.
The Role of Plumbing Material and Age, Separate from Source Water
Older Plumbing May Affect Radon Dispersion
Older pipes with leaks or cracks can allow radon gas to migrate from water into surrounding spaces more readily than new plumbing.
Material Porosity Does Not Increase Radon Content
The plumbing material itself does not add radon but may influence how easily radon gas escapes into indoor air from water.
What a Certified Laboratory Test for Radon Reports and How to Read It
Report Shows Radon Concentration in Picocuries per Liter (pCi/L)
The test result indicates the radon level dissolved in your water, typically in pCi/L. This numeric value is key to deciding if treatment is needed.
Comparison Against Local and Federal Guidelines
Your lab results can be compared to federal advisory levels to assess treatment necessity, but local area ranges provide context only for expected variation.
What the Measured Range Means Against the Federal Standard, and What It Does Not Mean
Range in Umatilla County Aquifer Falls Below Federal Maximum
The three wells sampled showed radon levels below the federal maximum contaminant level currently advised for radon in drinking water.
Detection Does Not Indicate Unsafe Water
Detection simply means the presence of radon was measured. It is not a health violation or a definitive indicator of risk without considering your own test results.
What Changes for a Large Household, a Second Home, or a Seasonal Property
Larger Households Need Greater Treatment Capacity
Homes with higher daily water usage may require treatment systems with sufficient capacity to handle the volume effectively.
Seasonal Properties May Experience Variable Radon Levels
Water chemistry and radon content can vary seasonally, so testing during different periods may inform treatment needs.
What Happens When This Problem Is Left Untreated for Years, Stated Without Exaggeration
Gradual Indoor Air Radon Levels May Rise
Ongoing use of water with radon can contribute to higher indoor airborne radon concentrations over time, potentially increasing exposure.
No Immediate Water Quality Changes Occur
Radon does not alter the taste or odor of water, so untreated water may seem normal despite dissolved radon presence.
This overview is based on the U.S. Geological Survey groundwater sampling of the N600CMBPLV aquifer in Umatilla County conducted in 2016. For detailed current information, please review the government data directly at the USGS website.
If your household requires a treatment option, the Autotrol Radon in Water Filter ships ready to configure to reduce radon levels in your water supply.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2016-08-10. 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 N600CMBPLV aquifer (Umatilla County): 3 results from 3 wells, median 203.0 pCi/L, range 110.0-450.0 pCi/L; none above any federal threshold
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