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Overview of Bartholomew County Water Source

The water in Bartholomew County commonly comes from aquifer 112PLSC, where groundwater is drawn from wells generally between 49 and 111 feet deep. This aquifer supplies many residential households, and its water quality is monitored through periodic sampling to help understand regional water characteristics affecting skin and household water uses.

Number of Samples and Wells Behind the Data

Eight samples from two distinct wells

The water quality figures for hardness elements calcium and magnesium are based on a small set of eight samples collected from two separate wells. This limited sampling means the results provide a regional view rather than a detailed map of variation within Bartholomew County. Individual wells may differ.

Seasonal and Multi-Year Variation in Water Quality

Sampling dates span May through November 2023

The USGS samples were collected between early May and mid-November 2023. This captures some seasonal variation during spring to late fall but does not reflect winter conditions or year-to-year changes. Seasonal shifts can influence mineral levels due to factors like water table depth and recharge rates.

Household Symptoms Related to Water Quality

Dry skin linked to water hardness minerals

Calcium and magnesium, measured as water hardness, can affect skin hydration by interacting with soaps and leaving mineral residues. Although dry skin can result from many causes, in a household with failed conditioning equipment, elevated hardness is a common consideration. However, dry skin alone does not confirm water quality as the cause.

Symptoms not explained by hardness data

Issues like rashes, redness, or allergic reactions require specific testing and medical evaluation; hardness data does not address these conditions directly. Also, no health-based violations were found in the area’s water record.

Understanding Key Terms in the Sampling Record

'Detected' means measurable presence, not a health concern

All eight samples detected calcium and magnesium levels well below any federal health thresholds. Detection indicates instruments measured these minerals, not that a problem exists.

'Median' and 'range' show typical values and variability

The median calcium plus magnesium concentration recorded is 377.0 mg/L, with a range from 343.0 to 394.0 mg/L. These figures help establish the expected hardness level homeowners might encounter from this aquifer.

Effect of Well Depth and Water Source Type

Water drawn from 49 to 111 feet deep

Sampled wells range in depth, influencing mineral content since deeper groundwater can dissolve different amounts of minerals. Private wells at different depths may have varying hardness levels distinct from the public record.

What the Measured Range Means Compared to Federal Standards

All samples below federal limits

The USGS results confirm that calcium and magnesium concentrations are below any related federal thresholds for drinking water. This means the hardness levels, while present, do not constitute a regulatory violation or health risk.

Important Conclusions and Next Steps

Bartholomew County’s aquifer 112PLSC data provides a regional snapshot indicating that water hardness is detected but not excessive by regulatory standards. Homeowners experiencing dry skin symptoms after their equipment failed should not assume the area’s water is unsafe or out of compliance. Instead, testing of their own well water is needed to determine exact mineral levels impacting their household. Specialized systems like the Pentair Dry, Itchy Skin System ship ready to configure and are designed to address hardness-related dry skin issues effectively when properly matched to the water conditions revealed by testing.

Where this information comes from

Source: USGS groundwater sampling. Sampled 2023-11-13. 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 112PLSC aquifer (Bartholomew County): 8 results from 2 wells, median 377.0 mg/L, range 343.0-394.0 mg/L; none above any federal threshold