Reading Certified Laboratory Hardness Reports
Report Focuses on Calcium and Magnesium Concentrations
Certified tests for water hardness quantify calcium (Ca) and magnesium (Mg) levels, reported together as milligrams per liter (mg/L). This combined figure reflects the dissolved minerals that influence water feel and skin response. For Rockingham County’s aquifer 112ICCC, U.S. Geological Survey sampling shows a median hardness of 257 mg/L from tests spanning 2014 to 2019.
Interpreting Hardness Results in Context
The report’s median and range (242 to 271 mg/L) represent typical mineral content for the area’s groundwater source. These values indicate moderately hard water, which may contribute to dry skin sensations during regular contact. No federal safety thresholds were exceeded in these samples, confirming the results reflect mineral presence rather than a health concern.
Effect of Well and Source Depth on Water Hardness
Sampled Wells at Uniform Depth Provide Consistent Hardness Expectations
Samples were taken uniformly at 83 feet depth, which suggests that wells drawing from similar depths in this aquifer can expect comparable hardness levels. Variations could occur with significantly shallower or deeper wells, but within this range, mineral concentration remains stable.
Source Type Influences Hardness Variability
Groundwater from rock aquifers like 112ICCC typically contains higher calcium and magnesium compared to surface water systems. Therefore, commercial operators relying on these wells should anticipate naturally elevated hardness as a baseline condition affecting water contact applications throughout their buildings.
Changes at the Tap with Commercial Water Softening
Water Softening Reduces Calcium and Magnesium Ions
When configured appropriately for large-scale use, commercial water softeners like the Nelsen 120,000 Grain Mineral-Tank model exchange hardness minerals for sodium or potassium ions, lowering mineral concentration. This process helps mitigate the drying effect on skin caused by hard water exposure.
Uniform Treatment Benefits Entire Building Water Supply
A system sized for the building’s water use capacity ensures that all water outlets deliver softened water consistently. This comprehensive approach addresses dry skin concerns effectively across the whole commercial property rather than at isolated points.
Comparing Rockingham County Data to Neighboring Areas
Median Hardness Values Differ Regionally but Need Context
Nearby counties may show lower or higher median hardness numbers, reflecting differences in their aquifers. However, these variations alone do not dictate individual well conditions. Commercial operators should not assume their water’s hardness matches the regional median without specific testing.
Sampling Period and Well Depth Affect Regional Comparison
Comparisons are meaningful only if sampling methods and well depths align. The consistent 83-foot well depths in Rockingham County’s 112ICCC aquifer samples provide a reliable baseline for this area but may differ from neighboring systems with variable depths.
Differentiating Hardness-Related Dry Skin from Other Water Issues
Hardness Is Distinct from Micronutrient or Contaminant Effects
Dry skin caused by hardness results from mineral interaction with water, not from biological contaminants or chemical pollutants. This distinction guides targeted testing and treatment approaches.
Hardness Does Not Indicate Health Risk but Can Affect Comfort
Although the minerals causing hardness are safe within measured levels, their presence influences skin hydration and texture. Addressing hardness can improve employee and visitor comfort without addressing other water safety parameters.
Next Step: Arrange for a certified laboratory test specifically measuring calcium and magnesium hardness for your building’s water source. A hardness level near or above the regional median would confirm the suitability of configuring a commercial water softener such as the Nelsen 120,000 Grain Mineral-Tank model to reduce dryness related to mineral content.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2019-08-22. 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 112ICCC aquifer (Rockingham County): 47 results from 1 wells, median 257.0 mg/L, range 242.0-271.0 mg/L; none above any federal threshold