How Public-System Records Differ from Private-Well Testing in What They Establish
If you wonder whether your dry skin is related to minerals in your household water in San Juan County, it’s important to understand what area water data can tell you. The U.S. Geological Survey has sampled groundwater from nine wells in the local aquifer 110AVMB over several years, measuring calcium and magnesium levels that contribute to water hardness. These results give a regional picture, not a direct test of your own water supply.
Unlike private well testing, which measures water from your specific source, the USGS data represent aggregated samples from wells 35 to 68 feet deep across the county. This sampling helps identify mineral ranges typical for the area but cannot confirm the mineral content of your household water, which can vary significantly even within short distances and from plumbing effects.
The Role of Plumbing Material and Age, Separate from the Source Water
Even if your source water matches regional mineral data, your home's plumbing can influence the water’s interaction with your skin. Older plumbing materials or accumulated scale can affect water quality as it reaches your taps. Minerals such as calcium and magnesium may precipitate or dissolve differently depending on pipe material and water temperature, modifying the water’s feel and its effects on your skin.
This means dry skin symptoms might also come from how water behaves in your home’s pipes, not just from the groundwater mineral levels.
What Changes for a Large Household, a Second Home, or a Seasonal Property
Household size and usage patterns influence how mineral-rich water affects skin comfort. Larger households use more water daily, increasing exposure to minerals that may dry the skin. Seasonal properties with plumbing that sits unused for periods may experience mineral deposits altering water quality when in use.
These varying usage scenarios can amplify or lessen the feeling of dryness despite similar source water quality as reported in the regional samples.
What a Certified Laboratory Test for This Constituent Reports and How to Read It
If you want to understand your own water's effects on dry skin, a certified water test targeting calcium and magnesium concentrations is necessary. Such a test provides measured mineral levels specific to your water source and plumbing conditions.
Laboratory reports typically list results in milligrams per liter (mg/L) for these minerals, allowing you to compare values to regional data. Remember, detected minerals are normal and not violations; the USGS data from San Juan County show mineral presence below any federal limit, indicating no safety concerns directly related to these minerals.
The Household or Facility Symptoms That Do and Do Not Point to This Problem
Dry, itchy skin after bathing or washing hands can be influenced by calcium and magnesium in water, as these minerals affect water hardness and can leave residue that dries skin. However, skin dryness can also arise from unrelated causes like weather, soaps, or dermatological conditions.
Symptoms consistent with mineral-related dryness often improve when water-softening or conditioning technologies are applied. The C-Series Dry, Itchy Skin System is specifically designed to address calcium and magnesium effects by conditioning your household water, helping reduce the dryness linked to these minerals.
What You Should NOT Conclude from Area Data
While the San Juan County aquifer data show mineral levels that may contribute to dry skin discomfort, they do not establish your water’s exact mineral content or severity of effects. No result in the sampled wells exceeded federal thresholds, so mineral presence alone is not a safety concern. To know your actual water quality and appropriate response, individual water testing remains the definitive step.
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 110AVMB aquifer (San Juan County): 229 results from 9 wells, median 1190.0 mg/L, range 644.0-1750.0 mg/L; none above any federal threshold