Government sampling of groundwater in Uvalde County, specifically from aquifer 218EDRDA, found total dissolved solids (TDS) detected in every sample from 14 wells, ranging from 0.3 to 332.0 mg/L, with a median of 250.0 mg/L. None of these results exceeded federal thresholds over a monitoring period starting in late 2010 through 2022. These findings provide a general picture of water quality in this area but do not define the condition of your own well.
Do Commercial or Industrial Water Use Questions Apply to Your Household Well?
Commercial or industrial operators typically evaluate water quality with considerations beyond those common in households. They assess factors like chemical-specific limits for equipment longevity, specialized contaminants for health compliance, and volume-based treatment capacities. As a household, your primary questions may focus on taste, staining, or equipment wear concerns rather than multi-constituent regulatory compliance or high-volume throughput. This distinction means your evaluation and treatment needs tend to be simpler and more focused on visible or performance symptoms.
Is Exceeding Secondary Aesthetic Standards a Safety Concern for TDS?
Total dissolved solids influence water’s taste, odor, and potential to stain fixtures or affect plumbing materials but are governed under secondary aesthetic standards, not health-based legal limits. Exceeding these aesthetic guidelines is not a violation nor an indicator of unsafe water. The U.S. Geological Survey data from Uvalde County show TDS levels well below any federal health thresholds. Therefore, concerns about TDS primarily relate to water quality perception and household convenience rather than health.
What Is the Recommended Process to Evaluate Your Well Water Quality?
- Start with basic observation of water clarity, taste, and any staining on fixtures.
- Check any household water treatment equipment functionality or maintenance records.
- Obtain laboratory testing focused on TDS and other relevant constituents specific to your well to know actual concentrations rather than relying solely on regional data.
- Consider consulting resources for interpreting certified laboratory results to understand what detected levels mean for your household use.
How Do Sampling Depth and Well Characteristics Affect Expectations for Water Quality?
The 14 Uvalde County wells sampled ranged from 130 to 1211 feet deep, showing a wide depth distribution that influences constituent concentrations. Deeper wells may encounter different mineral layers affecting dissolved solids, while shallower wells might show more surface influences. This variability means your well’s depth is an important factor in anticipating water quality issues but cannot replace direct testing for your specific source.
Why Regional Sampling Data Differs from Private Well Testing in Defining Your Water Quality
Publicly available records from regional aquifer sampling give useful background on the typical water quality range for an area but do not reveal the precise condition of any individual private well. Only well-specific laboratory analysis can measure your water’s actual concentrations of total dissolved solids and other constituents. Regional data should guide your understanding of what to expect but always be supplemented by your own testing to make informed treatment decisions.
For households in Uvalde County facing complete well water treatment questions, the Fleck Complete Well System offers a documented solution with a grain capacity of 32,000, suitable for addressing total dissolved solids issues consistent with regional water compositions. It ships ready to configure as a reliable option once tested needs are established.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2022-10-19. 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 218EDRDA aquifer (Uvalde County): 59 results from 14 wells, median 250.0 mg/L, range 0.3-332.0 mg/L; none above any federal threshold