Government Sampling Results for Arsenic in Bexar County
Recorded Arsenic Concentrations
The U.S. Geological Survey sampled 48 wells in Bexar County's aquifer 218EDRDA from July 2010 through December 2022. Among 139 results, arsenic was consistently detected with a median of 0.42 micrograms per liter (µg/L) and a range from 0.21 to 1.1 µg/L. None of these measurements exceeded any federal arsenic threshold.
Potential Effects of Long-term Arsenic Presence
Arsenic Exposure Without Treatment
When arsenic remains untreated in household water over many years, it can gradually introduce inorganic arsenic into consumption or use. Although the local aquifer samples are below federal limits, long-term exposure to arsenic at elevated levels may affect health. Understanding personal water test results is key to assessing individual risk.
Seasonal and Multi-year Variability in Arsenic Levels
Changes Observed Over Time
Sampling data collected over more than a decade indicate arsenic levels in Bexar County's aquifer remain relatively stable, ranging from 0.21 to 1.1 µg/L between 2010 and 2022. This suggests that seasonal or annual fluctuations in arsenic content at sampled depths (180 to 2326 feet) are minor within this area.
Impact of Property Use and Household Size
Differences for Large or Seasonal Households
Households with multiple residents or seasonal homes may experience varied water usage patterns, which can influence the demand on filtration or treatment approaches. Although arsenic concentrations in the aquifer are steady, larger or intermittently used properties might consider consistent water quality testing to verify their specific tap water status.
Changes in Water Quality After Treatment
Effects of Filtering Arsenic
Once the Fleck Arsenic Filter is applied, arsenic is specifically targeted and reduced from the household water supply. This results in improved water quality at the tap, lowering arsenic content to levels aligned with safe consumption standards. The system ships ready to configure for immediate use.
Interpreting Arsenic Concentrations vs Federal Standards
What The Measured Range Indicates
The federal maximum contaminant level for arsenic in drinking water is 10 micrograms per liter. Measured arsenic concentrations in Bexar County's aquifer wells fall considerably below this threshold. Detection of arsenic does not indicate a violation or unsafe water but underscores the benefit of personal water testing to confirm specific household conditions.
Identifying Symptoms Related to Arsenic in Household Water
What May and May Not Point to Arsenic Issues
Some household signs potentially associated with arsenic include unusual staining on fixtures or appliances and changes in taste. However, many other water quality factors can cause similar symptoms. No direct visual or sensory symptom definitively signals arsenic presence, so testing is essential to diagnosis.
For households seeking to address arsenic levels matching their own measured demand, the Fleck Arsenic Filter offers a documented solution designed to reduce arsenic efficiently, improving water safety and quality at the tap.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2022-12-14. 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 Arsenic in the 218EDRDA aquifer (Bexar County): 139 results from 48 wells, median 0.42 ug/L, range 0.21-1.1 ug/L; none above any federal threshold
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