Government groundwater sampling in Hillsborough County, NH, for aquifer 112SRFD shows calcium and magnesium concentrations detected in all five samples from three wells between 2010 and 2019. The median concentration was 55.2 mg/L, with a range from 17.7 to 127.0 mg/L. These results, taken from wells 20 to 60 feet deep, are below any federal thresholds for safety.
How Public-System Records Differ from Private Well Water Testing
Public groundwater data, like this USGS sampling, provides an overview of water quality in the region or aquifer but does not replace testing for a single household’s water. Individual wells can vary based on location, depth, and local geology. To understand water's effects on sensitive skin in your home, specific water testing focused on your well or supply is necessary. Public records inform general expectations but do not establish your particular water's composition.
What Changes for a Large Household, Second Home, or Seasonal Property
Household size and water use patterns influence how water quality affects those with sensitive skin. A larger household may see higher cumulative exposure to minerals like calcium and magnesium, which can interact with skin differently than in smaller homes. Seasonal or second homes might face variations due to water stagnation or changes in aquifer conditions during periods of non-use. These factors do not alter regional sampling data but affect personal water management needs.
A Worked Example: Reading the Record's Median and Range as a Homeowner
The median value of 55.2 mg/L indicates that half of the sampled wells had calcium and magnesium levels below this figure, and half above it. The range from 17.7 to 127.0 mg/L shows variability among local wells. For a homeowner, this means water hardness and mineral content can fluctuate substantially depending on well location and depth. Understanding this helps set realistic expectations for how water might impact skin sensitivity.
What 'Detected,' 'Median,' and 'Range' Mean in the Sampling Record
'Detected' means instruments measured calcium and magnesium in all samples; it does not imply any problem or violation. The 'median' is the middle value of the dataset, providing a typical concentration. The 'range' shows the lowest and highest values found in these samples over nearly a decade. These terms describe measured conditions but do not establish health risks or specific house water conditions.
Why Aesthetic Secondary Standards Differ from Health-Based Limits
Calcium and magnesium contribute to water hardness, which can affect skin comfort by influencing texture and response to soaps or detergents. Federal secondary standards address such aesthetic concerns like taste or staining but are not enforceable health rules. The concentrations detected in this aquifer are below any health-based limits, indicating no safety issues. Skin sensitivity relates more to personal reactions than regulatory standards.
In summary, regional sampling in Hillsborough County aquifer 112SRFD provides useful context but does not define your home’s water quality. Testing your own water is essential to determine if minerals like calcium and magnesium contribute to skin sensitivity. For households looking to manage sensitive skin, the Pentair Sensitive Skin & Eczema System offers a documented technology designed to address mineral-related skin impacts, with a grain capacity of 32,000 to support household needs. This system ships ready to configure and can be a targeted solution once testing clarifies your water conditions.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2019-09-25. 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 Hardness, Ca, Mg in the 112SRFD aquifer (Hillsborough County): 5 results from 3 wells, median 55.2 mg/L, range 17.7-127.0 mg/L; none above any federal threshold
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