Pentair Dry, Itchy Skin System

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If you find your household water use high, consider treatment capacity carefully

When dry skin is a concern, the amount of water your household uses daily is a key factor. Treatment systems need to handle your full household water demand to be effective. Assess your total daily water use by adding the number of occupants, typical shower time, laundry loads, and other water activities. This helps determine whether a treatment product can keep pace with your water needs or if you might need multiple units or a system scaled to higher capacity.

If you want to narrow down causes, start with the simplest checks and move toward detailed water testing

Dry skin related to water quality can stem from different factors. Before considering water treatment, first check if your home’s humidity is low or if soaps and detergents might be causing dryness. Next, inspect your home plumbing for signs of mineral buildup or corrosion. If these do not explain the skin issues, testing your water specifically for calcium and magnesium content is advisable since these minerals influence water hardness linked to dryness. A certified laboratory test of your water sample provides accurate results for your household.

If you’re curious how calcium and magnesium get into your Bexar County groundwater, here’s how they arrive

In Bexar County, the local aquifer designated 218EDRDA contains calcium and magnesium naturally dissolved from underground rock formations. According to U.S. Geological Survey data collected from 55 wells between 2010 and 2026, calcium and magnesium (measured as hardness) ranged between 201.0 and 442.0 mg/L with a median of 318.0 mg/L. These minerals appear consistently because of the geological composition of the aquifer, not due to contamination or human activities. Importantly, none of these results exceeded any federal health thresholds.

If you notice dry skin, examine specific water fixtures and their exposure first

The fixtures and uses of water most likely to reveal mineral effects are showers, baths, and sinks where water contacts the skin directly. Mineral-rich water can leave residues that affect skin moisture. Hard water also interacts with soaps, making rinsing less effective and sometimes contributing to a dry feeling. Appliances like dishwashers and washing machines often show mineral buildup sooner, but they do not impact skin directly.

If you want to interpret the government sampling data for your home, here is a guide

The USGS sample results represent a wide range of wells very deep underground (180 to 2326 feet). Your own water’s mineral content might differ, but these measurements set expectations for Bexar County’s aquifer. The median hardness of 318.0 mg/L means a typical well in the area has moderate levels of dissolved calcium and magnesium. If your well water test results are near this range, mineral-driven dryness could be a factor to address. Lower or higher readings may indicate different conditions.

After determining your daily water demand and confirming your water’s mineral content through testing, you may explore treatment options. The Pentair Dry, Itchy Skin System ships ready to configure and is designed to meet household water demands, helping to reduce the impact of mineral content on skin dryness. Evaluating your own water demand figures is essential to selecting a treatment approach that performs effectively in your home.

Where this information comes from

Source: USGS groundwater sampling. Sampled 2026-06-02. 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 218EDRDA aquifer (Bexar County): 341 results from 55 wells, median 318.0 mg/L, range 201.0-442.0 mg/L; none above any federal threshold