Understanding Seasonal and Multi-Year Variation in Water Quality Data
Data spans from 2019 to 2025
The recorded water quality data for San Juan County's aquifer N300COPLTS covers a period from March 2019 through September 2025, showing how constituent levels have fluctuated over time in the sampled wells.
Range of constituent levels over six years
The measurements of calcium and magnesium combined, a factor in water hardness, vary between 1110.0 mg/L and 3670.0 mg/L across this timeframe, reflecting natural changes or aquifer dynamics rather than consistent water conditions.
Comparing San Juan County to Neighboring Water Records Without Overinterpretation
Regional differences in water hardness can exist
Adjacent counties may report different hardness levels, but differences in these regional records do not directly diagnose local household water quality without specific testing of your own supply.
Area-wide median guides expectations
The median hardness value of 1390.0 mg/L in San Juan County's aquifer offers a general reference but cannot specify the exact conditions of your household water.
Scope and Significance of Sampling Effort in the County
Seven wells sampled multiple times
The dataset includes 37 samples drawn from seven different wells between 38 and 45 feet deep, representing a snapshot of the aquifer in this area but not your unique water source.
Limited sample size implies cautious interpretation
While comprehensive for a regional study, the number of samples and wells mean this data cannot replace individual water testing necessary for personal household decisions.
Household Symptoms Relevant and Irrelevant to Water-Related Sensitive Skin
Symptoms possibly linked to water exposure
Persistent skin irritation or eczema may correlate with exposure to certain water qualities; water hardness components like calcium and magnesium can influence skin feel but do not cause direct health harm.
Symptoms not explained by water quality data alone
Other causes like detergents, soap, allergens, or environmental factors often contribute to sensitive skin and require consideration outside water analysis.
How Calcium and Magnesium Enter Groundwater in This Region
Natural geological sources
The minerals calcium and magnesium originate from natural dissolution of local rock formations in San Juan County, affecting groundwater composition in the N300COPLTS aquifer.
Limited human industrial impact reported here
No significant evidence suggests these minerals come from pollution or contamination; their presence aligns with typical groundwater chemistry in this arid region.
Interpreting Constituent Levels Against Federal Standards
No federal thresholds exceeded
None of the 37 samples exceeded any federal limits related to calcium or magnesium content; these measurements concern water aesthetics rather than safety.
Detection does not equal a problem
Presence of calcium and magnesium is normal and expected; their measurement reflects water characteristics that may influence skin feel or appliance care but not health risk.
Government data provide a regional overview but must not be used to assume individual water conditions. To understand how water affects your skin, testing of your household supply is essential, particularly regarding specific chemical balances and sensitivities. The Pentair Sensitive Skin & Eczema System offers a focused treatment approach, designed to address issues linked to water quality factors like those found here, with a 32,000-grain capacity suitable for typical household needs. This review helps frame the decision path from regional water characteristics to personal water quality testing and targeted treatment selection.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2025-09-18. 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 N300COPLTS aquifer (San Juan County): 37 results from 7 wells, median 1390.0 mg/L, range 1110.0-3670.0 mg/L; none above any federal threshold
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