Government groundwater sampling in Grant County, WA, focusing on the N600CMBPLV aquifer, recorded radon-222 concentrations with a median of 370.0 pCi/L and a range from 242.0 to 550.0 pCi/L based on three separate wells sampled in July 2016. These measurements reflect spot concentrations in wells 335 to 1240 feet deep and do not represent your household well or tap water.
If you think public-system area data directly shows your well's radon levels
Government sampling provides an area-wide indication of radon presence in groundwater but cannot specify the concentration in any individual residential well. Radon distribution varies locally with geology and well depth. Public data is useful for awareness but insufficient for personal water safety or treatment decisions without your own water testing.
If you consider the measured radon range as a violation or unsafe condition
None of the sampled wells in this dataset exceeded federal radon thresholds applicable to public water systems. A radon detection does not imply a health violation or unsafe water by federal standards. A measured range indicates the presence and variability of radon in the aquifer but cannot alone determine household risk or action thresholds.
If you plan to seek expert advice on treatment, what should you document first
- Date of your water sample collection and testing lab information
- Radon concentration result measured specifically from your household water
- Well construction details such as depth and type
- Household water usage patterns and flow rates
Having these details ready supports clear communication with water professionals and ensures accurate assessments for treatment recommendations.
If you want to know how the C-Series Radon in Water Filter addresses this issue
This system uses proven filtration technology designed to reduce radon concentrations in household water. It operates by removing radon from the water before it reaches taps, helping minimize radon exposure via water usage such as showering and cooking. The system ships ready to configure for your household plumbing setup.
If you need to assess the appropriate treatment capacity
Match the system's treatment flow rate with your household's daily water demand, including peak usage periods. Estimating gallons used per day helps ensure the filtration system functions effectively without reducing water pressure or flow. The product literature will provide guidance on capacity ranges aligned with typical residential use.
If you want to compare Grant County's radon data with neighboring counties
Regional variations exist due to differences in geology and aquifer properties, causing radon levels to fluctuate among adjacent counties. While neighboring data can inform broad risk perception, it should never replace testing from your own well. Local geology and well construction produce unique water characteristics.
To resolve uncertainties about radon in your household water, order a laboratory analysis of water drawn directly from your taps. A radon concentration result specific to your water supply will confirm whether treatment is recommended and allow selection of the right system capacity. This test offers the definitive information to guide your radon mitigation approach.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2016-07-28. 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 (Grant County): 3 results from 3 wells, median 370.0 pCi/L, range 242.0-550.0 pCi/L; none above any federal threshold