Radon in Harris County Water: Understanding Detected Levels and Range Variations
Deciding Radon Treatment Requires Understanding Local Sampling Records
This week, you face the choice of which radon water treatment equipment best fits your household’s needs in Harris County, Texas. Government groundwater sampling provides a valuable record but does not replace your own water test. Understanding this record’s terms helps clarify what information you have and what you need to obtain.
Interpreting 'Detected,' 'Median,' and 'Range' in Radon Sampling Data
Between 2010 and 2016, 15 samples from 13 wells in Harris County’s 112CHCT aquifer detected radon-222 in all results, with none falling below reporting limits. These wells ranged from 305 to 1190 feet deep. The median value was 370.0 picocuries per liter (pCi/L), meaning half the samples were above and half below this level. The range spanned from 70.0 to 2380.0 pCi/L, indicating the lowest and highest radon measurements found across all sampled wells. Such figures describe area tendencies, not a single well’s specific condition.
How a Homeowner Can Read Median and Range Figures
Imagine your household water source taps aquifer 112CHCT groundwater similar to the sampled wells. The median of 370.0 pCi/L suggests typical local radon detection, but some wells showed considerably lower or much higher levels. This spread means your own well’s radon content could vary widely and must be measured directly for accurate knowledge. Knowing the median and range sets a context for interpreting your test results rather than defining your water’s radon precisely.
Information to Record Before Seeking Radon Water Treatment Advice
Before deciding on equipment like the Autotrol Radon in Water Filter, note details including:
- The depth and location of your well.
- Results from your own radon water test, ideally performed by a certified laboratory.
- Water usage patterns and household size.
- Any known plumbing system characteristics relevant to water quality.
Documenting these facts helps tailor treatment options to your circumstances.
Adjustments for Large Households, Second Homes, or Seasonal Properties
Household size and water use frequency affect treatment system demands. Larger or multi-resident homes require equipment capable of handling higher flow rates and volumes. Second or seasonal homes may face maintenance or operational considerations due to intermittent use. Such factors influence which radon removal system is most practical and effective.
Plumbing Materials and Age Influence Water Quality Independently From Source Radon
While radon originates from groundwater, plumbing systems can affect water characteristics after it leaves the source. Older pipes may contribute to corrosion or other water quality issues separate from radon. Choosing a radon filter system should account for the plumbing setup to ensure compatibility and performance over time.
In summary, the government-sampled radon record for Harris County’s 112CHCT aquifer informs about local groundwater tendencies but not individual wells. Your best approach is to measure your own water, record relevant household and plumbing information, and then select a system like the Autotrol Radon in Water Filter that suits your specific needs.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2016-08-09. 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 (Harris County): 15 results from 13 wells, median 370.0 pCi/L, range 70.0-2380.0 pCi/L; none above any federal threshold

