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Understanding What Area Sampling Tells Your Household

The U.S. Geological Survey has sampled six wells in Lake County’s aquifer 110DUNED area, collecting 52 total dissolved solids (TDS) measurements between September and November of 2014. These results represent general groundwater quality trends for the aquifer zone rather than any single residential well’s condition. Without testing your own well water, you cannot know its specific TDS level or other characteristics. Area data provide a broader context for understanding potential water quality challenges and planning treatment.

Seasonal and Multi-Year Variation in Groundwater Quality

Although the samples were taken over a short period in late 2014, variability within that timeframe is visible. The range of TDS values spans from as low as 1.0 tons per acre-foot to as high as 4620.0 tons per acre-foot. This shows that even within a few months, groundwater quality can vary substantially from well to well or source to source. For homeowners with complete wells drawing from this aquifer, TDS concentrations may fluctuate due to seasonal recharge, groundwater flow patterns, and other hydrogeologic factors.

The Influence of Plumbing Materials and System Age on Water Quality

Your home's plumbing and water system components can alter water characteristics independently of source water quality. Older pipes or fittings may interact with water causing staining or taste changes that area aquifer data cannot reflect. Selecting effective water treatment depends not only on source water TDS levels but also on how water chemistry interacts with your household’s plumbing materials over time.

Clarifying Median, Range, and Detected in the Sampling Records

The area aquifer sampling reported a median TDS of approximately 370 tons per acre-foot. Median indicates the middle value of all samples collected and helps to understand typical conditions. The full range—from 1.0 to 4620.0 tons per acre-foot—illustrates wide variation. All 52 samples detected TDS, meaning measurable amounts were present, but this is common and not a safety concern. Half of the samples exceeded an aesthetic secondary standard of 500 mg/L TDS, which relates only to taste and staining, not safety.

What Long-Term Neglect of Treatment for Elevated TDS Means

If total dissolved solids remain unmanaged in your complete well water, over years you may notice impacts such as scaling in pipes and appliances, changes in taste, and possible staining on fixtures. These effects result from the mineral content associated with TDS and can affect household comfort and maintenance costs. Treatment can address these concerns by reducing mineral deposit buildup and improving water aesthetics without implying health risks.

Considerations for Larger or Seasonal Households

Households with higher water demand or those using their well seasonally should consider treatment capacity accordingly. Variations in usage influence how treatment systems perform and how often maintenance or recharging cycles are required. Understanding the aquifer’s typical and extreme water quality helps in selecting a system with enough capability to handle peak needs without over-sizing.

Interpreting the Median and Range for Your Treatment Decision

With a median TDS near 370 tons per acre-foot but some wells reaching up to 4620.0 tons per acre-foot, treatment systems should be selected for flexibility and capacity. For example, a system rated with 32,000 grains of capacity can handle substantial dissolved solids and provide effective conditioning for a residential complete well in this area. Testing your own water will confirm specific concentrations and help refine this choice.

Closing Summary and Data Source

This briefing summarized total dissolved solids data from six wells 25 to 30 feet deep sampled in Lake County, Indiana’s aquifer 110DUNED area during late 2014. These results inform but do not define your complete well water’s exact profile. For detailed analysis, individual well testing is essential. The original groundwater sampling data can be reviewed via the U.S. Geological Survey monitoring location 413921087290103.

Where this information comes from

Source: USGS groundwater sampling. Sampled 2014-11-06. 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 Total dissolved solids in the 110DUNED aquifer (Lake County): 52 results from 6 wells, median 369.645 tons/ac ft, range 1.0-4620.0 tons/ac ft; 26 above an AESTHETIC secondary standard only (secondary standard 500.0 mg/L (aesthetic)) - not a health finding