A worked example: reading the record's median and range as a homeowner would
The median hardness is 97.4 mg/L
According to U.S. Geological Survey data for the 100SDGV aquifer in Forest County, the median concentration of hardness (measured as calcium and magnesium) in sampled wells is 97.4 mg/L. This level suggests moderate mineral content that can contribute to scale buildup in water heaters over time.
The range spans from 6.37 to 314.0 mg/L
The hardness concentration varies widely in sampled wells from as low as 6.37 mg/L to as high as 314.0 mg/L, reflecting natural variability in the aquifer. It is important to recognize that your household water’s hardness could be anywhere within this range, and only direct testing can determine your specific water profile.
The role of plumbing material and age, separate from the source water
Older plumbing systems may exacerbate scale buildup
Mineral deposits can accumulate more rapidly in older pipes or water heater tanks, independent of water hardness. Age and material type influence how scale adheres and develops, affecting equipment efficiency.
Pipe material impacts scale formation
Materials such as galvanized steel or copper react differently with hard water minerals. This interaction can speed up mineral deposition inside water heater systems.
What the reader should write down before asking anyone for treatment advice
Record recent water test results from your household supply
Testing your well or municipal tap water for calcium and magnesium concentrations is essential to tailor a treatment plan. Laboratory analysis will provide precise hardness levels relevant to your situation.
Note the age and material of your water heater and piping
Information about your home's water system infrastructure helps assess scale formation tendencies unrelated to source water parameters.
Document your household’s water usage patterns
Daily flow needs inform treatment capacity decisions, ensuring solutions match demand without excess or insufficiency.
What 'detected', 'median' and 'range' mean in the sampling record on this page
Detected means mineral concentration was measured
Each of the nine samples from six wells showed measurable calcium and magnesium; none were below reporting limits. Detection indicates presence but is not a health violation or proof of scale risk alone.
Median represents the middle value of all results
The median hardness of 97.4 mg/L means half the samples were below and half above this level, providing a central tendency estimate for the aquifer’s mineral content.
Range indicates the lowest and highest values found
Hardness values from 6.37 to 314.0 mg/L demonstrate variability across sampled wells. This spread highlights the importance of local testing rather than relying solely on regional data.
How sample depth, well depth or source type changes what a reader should expect
Sampled wells ranged 15 to 90 feet deep
The data reflects groundwater from wells within this depth range in the 100SDGV aquifer. Deeper or shallower groundwater sources may have different mineral profiles.
Well depth affects mineral concentrations
Shallower wells sometimes encounter different mineral layers than deeper ones, influencing water hardness and scale potential.
Water source type impacts treatment needs
Private wells versus public water systems can have distinctly different hardness levels and variability. Understanding your water source helps anticipate scale challenges and appropriate approaches.
Closing summary
This page summarizes government sampling of hardness constituents in Forest County’s 100SDGV aquifer from six wells between 2011 and 2024. While the data informs about regional water quality, individual household water testing is necessary to determine the exact cause of water heater scale. The Pentair System ships ready to configure and serves as a documented option to address scaling caused by minerals consistent with this aquifer’s profile. For detailed government data, consult the U.S. Geological Survey groundwater records referenced above.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2024-09-11. 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 100SDGV aquifer (Forest County): 9 results from 6 wells, median 97.4 mg/L, range 6.37-314.0 mg/L; none above any federal threshold