What a Certified Laboratory Test for Calcium and Magnesium Reports and How to Read It
Water sampled from wells in the San Juan County aquifer shows calcium and magnesium concentrations measured as hardness in milligrams per liter (mg/L). The U.S. Geological Survey (USGS) recently reported 11 results from 8 wells, with hardness values ranging from 449.0 to 1560.0 mg/L and a median of 1120.0 mg/L. This hardness level reflects dissolved minerals in the water, which can influence skin moisture retention but is not a direct safety indicator. Certified water tests quantify these minerals, allowing commercial operators to understand their water profile. To assess your specific water, a certified laboratory analysis is required; area data only provides general context.
What Distinguishes Dry Skin Linked to Water Minerals from Other Common Skin and Water Issues
Dry skin in commercial environments can arise from various sources including ambient air conditions or chemical irritants, but mineral content in water is a distinct factor. High levels of calcium and magnesium – the primary contributors to water hardness – can reduce skin's natural oils, leading to dryness following exposure. This is different from issues caused by chlorine or microbial contamination, which relate to disinfection and safety rather than mineral balance. Understanding this distinction helps target treatment approaches appropriately rather than assuming all water-related skin issues share the same cause.
The Role of Plumbing Material and Age, Separate from Source Water
While source water hardness contributes to skin dryness, the plumbing system’s materials and condition are independent factors. Older pipes or certain metals can influence water taste or introduce trace elements but do not alter the dissolved mineral concentration significantly. In commercial settings, plumbing corrosion or buildup may impact water appearance or flow but does not mimic the mineral effects that lead to skin dryness. Evaluating plumbing separately from water chemistry ensures accurate diagnosis of water-related skin concerns.
Household or Facility Symptoms That Do and Do Not Point to Water Mineral-Related Dry Skin
Signs that dry skin is related to water minerals include consistent skin dryness in staff or patrons following water exposure and difficulty maintaining skin moisture despite using lotions. However, symptoms like rashes, itching unrelated to water contact, or redness suggest other causes such as allergens or irritants. Not all skin dryness in commercial environments is linked to water minerals, so correlating symptoms with water exposure and testing is important before deciding on treatment methods.
How Public-System Records Differ from Private-Well Testing in What They Establish
San Juan County’s aquifer hardness data from the USGS covers several wells 37 to 101 feet deep but does not assess any single well’s water quality. Public utility records or private-well tests provide specific results for particular commercial water supplies. The USGS data indicates no federal safety thresholds were exceeded in sampled wells, establishing no regulatory concerns for this constituent broadly in the area. However, individual water sources should be tested independently to determine actual hardness levels affecting your facility’s water and associated dry skin issues.
In summary, the USGS data offers a valuable overview of calcium and magnesium levels in San Juan County’s aquifer. It helps commercial operators understand the potential for mineral-related dry skin but cannot substitute for site-specific water testing. For managing this problem effectively, the Nelsen 900,000 Grain Mineral-Tank Commercial Water Softener provides a proven technology designed to address mineral hardness on a commercial scale. This equipment ships ready to configure, allowing tailored treatment to your water profile. More details on the USGS aquifer sampling can be found at their official site documenting the San Juan County groundwater monitoring.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2025-09-19. 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 aquifer (San Juan County): 11 results from 8 wells, median 1120.0 mg/L, range 449.0-1560.0 mg/L; none above any federal threshold