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Interpreting Multi-Year and Seasonal Variation in Mineral Levels

Sampling Dates Reflect Long-Term Trends

The U.S. Geological Survey collected groundwater samples from Delta County's aquifer 368PRDC between June 15, 2011, and July 29, 2015. These samples show mineral levels over several years rather than isolated readings.

Consistent Mineral Concentrations Across Seasons

The data from two separate wells, approximately 290 to 305 feet deep, indicate stable concentrations of calcium and magnesium within a narrow range (219.0 to 237.0 mg/L). This suggests minimal seasonal fluctuation in these minerals in this aquifer.

Understanding the Median and Range as a Homeowner

The Median Indicates Typical Water Hardness

A median concentration of 227.0 mg/L reflects the middle value of the sampled mineral levels. It helps estimate what is usual in the local water source but is not specific to any single household.

The Range Shows Natural Variability

The span from 219.0 to 237.0 mg/L indicates variability between wells and over time but remains within a relatively tight band, signaling consistent groundwater composition in the aquifer region.

Adjustments for Household Size and Usage Patterns

Larger or Multi-Resident Homes May Require Greater Capacity

A household with many occupants or high water usage could need equipment with enhanced grain capacity to manage mineral load effectively.

Second or Seasonal Homes Should Account for Usage Gaps

Homes used intermittently may face different mineral precipitation and water quality patterns, requiring tailored system sizing to maintain comfort for sensitive skin.

Long-Term Impact of Unaddressed Mineral Effects on Sensitive Skin

Mineral Residues Can Aggravate Skin Sensitivity

Even with no health-based violations, elevated calcium and magnesium levels can contribute to dryness or irritation in sensitive skin over time if untreated.

Persistent Exposure May Increase Skin Discomfort

Without mitigation, the minerals often associated with water hardness may worsen eczema symptoms or other sensitivities, emphasizing the need for careful water treatment.

Scope and Limitations of the Delta County Aquifer Data

Based on Three Samples from Two Wells

The dataset comprises only three results from two distinct wells, which may not represent all variations across the entire aquifer or household-specific water.

Data Does Not Identify Individual Well Conditions

These area-wide findings do not confirm or predict the exact mineral content in any private well; specific water testing is necessary for precise household data.

No Federal Thresholds Exceeded in This Dataset

All measured mineral levels were below any federal action levels. These findings relate to water composition but do not indicate unsafe or non-compliant water quality.

What Not to Conclude from Area Aquifer Mineral Data

Do Not Assume Your Water Shares These Exact Levels

Groundwater can vary widely across locations and depths; individual well testing is required to understand personal water quality.

Detection Does Not Signal a Violation or Health Risk

The presence of minerals Ca and Mg at these concentrations is typical and not defined as unsafe or a regulatory violation.

Area Data Alone Cannot Diagnose Skin Issues

While mineral levels may influence sensitive skin, other factors such as plumbing conditions and personal skin responses also play a role.

Suggested Approach for Sensitive Skin Households in Delta County

Test Personal Water to Determine Exact Mineral Levels

Laboratory analysis of your well or tap water is essential to confirm mineral concentrations and inform treatment needs.

Consider a Water Treatment System with Adequate Capacity

The Fleck Sensitive Skin & Eczema System, with a grain capacity of 32,000, ships ready to configure and addresses elevated minerals that may affect skin comfort.

Evaluate Usage Patterns to Choose Proper System Size

Households with multiple residents or frequent high water demand should size treatment equipment to maintain consistent water quality beneficial for sensitive skin care.

Where this information comes from

Source: USGS groundwater sampling. Sampled 2015-07-29. 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 368PRDC aquifer (Delta County): 3 results from 2 wells, median 227.0 mg/L, range 219.0-237.0 mg/L; none above any federal threshold