The U.S. Geological Survey groundwater samples taken from 11 wells within Douglas County's N100BSNRGB aquifer show that water hardness, measured as combined calcium and magnesium, was detected in all 161 samples with a median concentration of 136.0 mg/L, ranging from 15.1 to 311.0 mg/L. These samples were collected at depths between 88 and 180 feet from 2010 through 2026. No measurements in this data set exceed federal regulatory thresholds.
Distinguishing Scale from Other Common Water Issues
Scale forms from calcium and magnesium minerals precipitating inside water heaters
Scale differs from corrosion or sediment buildup, which involve different water constituents and treatment needs
Interpreting Regional Water Hardness Compared to Neighboring Areas
Neighboring counties may show different hardness medians and ranges that reflect local geology and aquifer characteristics
Douglas County's median hardness of 136.0 mg/L indicates moderate to high scaling potential relative to many regional comparisons
This regional data describes area aquifer conditions, not any specific water source
Assessing Treatment Capacity for Commercial Water Heater Scale Prevention
Match treatment system capacity with the facility’s peak daily water volume to maintain scale control efficiency
Consider the variability in hardness within the range found when selecting appropriate treatment size
Commercial System Skids like the 42 Fiberglass Tanks - Twin Unit Skid ship ready to configure for capacity needs
Consequences of Leaving Water Heater Scale Untreated Over Time
Gradual reduction in water heater efficiency due to insulating layers of mineral deposits
Increased energy consumption and operating costs as heating elements work harder
Possible premature equipment wear and need for increased maintenance
Differences Between Public System Records and Private Well Testing
Public system data represents aggregated groundwater monitoring and regional aquifers, not individual sources
Private wells require specific testing to establish site-specific water quality including hardness
Public records provide a baseline to inform likely water characteristics but do not replace direct analysis
What a Certified Lab Hardness Test Reports and How to Interpret It
Reports show calcium and magnesium hardness typically in mg/L as CaCO3 equivalent
Test results provide a precise measure of the scale-forming minerals in the specific water source
Compare lab data with regional medians and ranges to understand where the water fits within the area's variability
To confirm your commercial facility’s water heater scale risk and select the correct treatment capacity, order a certified laboratory water hardness test reporting calcium and magnesium concentrations as CaCO3. A measured total hardness near or above the regional median of 136.0 mg/L indicates consideration of a robust treatment option like the 42 Fiberglass Tanks - Twin Unit Skid. This direct test result settles the question of your water’s scaling potential and guides an informed approach to controlling water heater scale.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2026-03-18. 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 N100BSNRGB aquifer (Douglas County): 161 results from 11 wells, median 136.0 mg/L, range 15.1-311.0 mg/L; none above any federal threshold
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