It is not uncommon for operators managing water treatment for entire commercial buildings in New Castle County to notice that occupants with sensitive skin may experience irritation or dryness after contact with tap water. This concern often prompts a closer look at what the local water contains.

Interpreting Local Aquifer Mineral Levels as a Starting Point

The U.S. Geological Survey collected groundwater samples from 23 wells within New Castle County’s 125RCCS aquifer between June 2015 and August 2024. These samples measured calcium and magnesium concentrations, key contributors to water mineral content often perceived through effects on skin.

The median concentration of these minerals was 137.0 mg/L, with a range spanning from 1.07 mg/L to 250.0 mg/L. While these numbers reflect what has been detected in the area’s aquifer, they do not indicate the exact mineral content of any particular building’s water supply, as individual well samples are needed for precise results.

Regular Care for Commercial Water Treatment Systems

For managing mineral-related skin sensitivities across an entire building’s water system, maintaining the treatment equipment on a reliable schedule is key. Commercial water softeners, like the Nelsen 210,000 Grain Skid-Mounted Commercial Water Softener, are designed to operate smoothly through planned replenishment of conditioning agents and routine system checks conducted by facility staff familiar with water treatment operation.

This approach helps ensure consistent conditioning of water, which can alleviate mineral-related skin irritation throughout the building without the need for frequent unplanned interventions.

Understanding What 'Detected', 'Median', and 'Range' Mean in Groundwater Sampling Results

In groundwater studies, “detected” means the measuring instruments found a measurable amount of calcium and magnesium in every sample taken. The “median” value represents the middle point within the range of measurements, helping to convey a typical concentration in the area’s aquifer. The “range” indicates the highest and lowest levels recorded across different wells and times.

None of the findings from these samples exceeded federal health-based thresholds, indicating these mineral levels are within norms typically expected in this region’s groundwater and do not represent safety concerns.

What a Certified Laboratory Test for Your Building’s Water Would Show

Obtaining a professional analysis of your building’s water involves collecting a sample from the water system and having it tested by a certified laboratory. The lab report will specify calcium and magnesium concentrations, often reported in milligrams per liter (mg/L).

Reviewing this data helps confirm whether mineral levels align with those detected in the local aquifer or if site-specific conditions exist. This information is essential for tailoring a commercial water treatment solution to the building’s needs.

The Significance of Sample Size and Its Limitations

The 24 analyses from 23 wells offer a solid regional snapshot but cannot replace localized testing. Factors such as varying well depths (ranging from 66 to 300 feet) and geological diversity impact individual water composition. For commercial operators, relying solely on regional data may not capture specific building water characteristics influencing sensitive skin.

Adjustments for Larger Facilities or Variable Occupancy

For larger commercial buildings or sites with fluctuating usage patterns, capacity planning based on actual water demand and mineral content is important. The Nelsen softener’s 210,000-grain capacity allows for handling substantial flow and load, accommodating sustained operation and variations in water quality over time.

Final Step: Testing Your Building's Water for Mineral Content

The definitive measure to address skin sensitivity in your commercial water system is to have a certified laboratory carry out a water hardness test focused on calcium and magnesium. The outcome will confirm the appropriate treatment needs and how products like the Nelsen 210,000 Grain Skid-Mounted Commercial Water Softener can be integrated into your water conditioning strategy to enhance occupant comfort.

Where this information comes from

Source: USGS groundwater sampling. Sampled 2024-08-20. 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 125RCCS aquifer (New Castle County): 24 results from 23 wells, median 137.0 mg/L, range 1.07-250.0 mg/L; none above any federal threshold