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Why do aesthetic secondary standards for total dissolved solids differ from health-based limits?

Secondary standards for total dissolved solids (TDS) address aesthetic qualities such as taste, odor, and staining, rather than health concerns. In Morehouse Parish’s aquifer 124SPRT, U.S. Geological Survey data show some TDS measurements exceed the aesthetic guideline of 500 mg/L, but this does not imply a health risk. These standards help homeowners understand potential impacts on water’s appearance and flavor rather than safety.

What does the measured range of total dissolved solids indicate compared to federal standards, and what does it not mean?

The total dissolved solids in this area range from about 1.47 mg/L to 1120 mg/L across sampled wells. While the aesthetic secondary standard is 500 mg/L, exceeding this number simply suggests possible changes in taste or water staining; it is not a violation or health hazard. This range reflects variability in mineral content but does not indicate unsafe water quality.

How many samples and wells provide the basis for these figures, and what are the implications of a small sample size?

The data are based on 32 total samples collected from two wells between 600 and 774 feet deep from 2010 through 2018. Though limited to two wells, this sampling provides regional insight for aquifer 124SPRT but cannot represent every private well’s water quality in Morehouse Parish. Individual well testing is necessary for specific assessment.

How does seasonal or multi-year variation appear in the sampling record?

Sampling took place over more than eight years, showing that TDS levels can fluctuate over time in this region’s aquifer. The presence of both low and high values across dates indicates natural variability rather than a stable condition, emphasizing the importance of current testing to understand your well’s water.

What do the terms 'detected,' 'median,' and 'range' mean in the context of this sampling record?

"Detected" means the instrument measured some concentration of TDS; it does not signify a health concern. The "median" value of 1080 mg/L represents the middle value of detected concentrations, giving a sense of typical levels in this area. The "range" shows the spread from the lowest to the highest measured levels, illustrating variability rather than compliance with a limit.

What is the recommended process for ruling out water quality problems in a residential complete well?

Start with basic checks such as visual inspection and noting changes in taste or staining, then move to laboratory analysis for total dissolved solids and other constituents. These steps help identify whether treatment is advisable and what type fits your water’s profile.

For households drawing from Morehouse Parish’s aquifer 124SPRT, the Fleck Complete Well System offers a documented solution for treating water with elevated total dissolved solids. This system provides a treatment capacity of 32,000 grains, suitable for residential use, and ships ready to configure without requiring professional setup.

Deciding on water treatment involves understanding regional data, recognizing the limits of those data, and testing your own well. The pathway outlined here helps clarify when treatment like the Fleck Complete Well System can address water quality concerns effectively.

Where this information comes from

Source: USGS groundwater sampling. Sampled 2018-09-20. 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 124SPRT aquifer (Morehouse Parish): 32 results from 2 wells, median 1080.0 mg/L, range 1.47-1120.0 mg/L; 14 above an AESTHETIC secondary standard only (secondary standard 500.0 mg/L (aesthetic)) - not a health finding