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Arsenic Monitoring in Highlands County Aquifer 120UFAQ

The U.S. Geological Survey has conducted groundwater sampling focused on the 120UFAQ aquifer beneath Highlands County, Florida. This sampling included two distinct wells at depths between 1,520 and 1,530 feet, with three measurements taken from April 2015 through January 2026. Arsenic was detected in all three results, with a median concentration of 0.27 micrograms per liter (ug/L) and a range from 0.22 to 0.28 ug/L.

It is important to emphasize that these results reflect the measured arsenic levels in wells within the aquifer area—not the arsenic concentration in any individual home’s water supply. No measurement in this data set surpassed federal arsenic thresholds established for drinking water.

What Arsenic Detection Means for Residential Water

Arsenic naturally occurs in some groundwater sources and can affect water quality. While low-level detection like that reported for Highlands County wells is common in many aquifers, actual concentrations in household water require testing of that specific water source. Detection alone does not indicate contamination requiring alarm but does warrant awareness and consideration of treatment options if ongoing testing shows elevated levels.

Arsenic exposure through drinking water over long periods can pose health risks, which is why regulatory thresholds exist. However, the federal limits are set to protect general public health and are supported by extensive research and monitoring.

The Importance of Testing Your Own Water

Since arsenic concentrations can vary significantly even between neighboring wells, the only way to determine if your household water contains arsenic near or above recommended levels is to have a certified laboratory analyze a water sample from your tap or well.

How Reverse Osmosis Addresses Arsenic in Home Water

For households seeking to reduce arsenic levels in their water, proven water treatment technologies are available. Reverse osmosis (RO) is one such solution, utilizing a semipermeable membrane to remove many contaminants, including arsenic.

The 1400 gallons per day (GPD) Commercial Reverse Osmosis system offered by WaterSoftenerPlus ships ready to configure and features a 5x40 gallon tank size, making it suitable for residential use where elevated arsenic might be a concern. This system effectively reduces arsenic concentrations to levels well below federal guidelines, enhancing water quality and peace of mind.

Because water chemistry varies widely, pairing reverse osmosis with periodic water testing ensures the system continues to perform as expected and your household water remains safe and comfortable for everyday use.

Summary

• U.S. Geological Survey sampling in Highlands County aquifer 120UFAQ detected low levels of arsenic (median 0.27 ug/L) in deep groundwater wells sampled between 2015 and 2026.
• These measurements do not represent your well’s arsenic level; testing your own water source is necessary to confirm arsenic presence and concentration.
• Arsenic is a naturally occurring element that can impact water quality if concentrations are elevated, but federal limits aim to protect health.
• The 1400 GPD Commercial Reverse Osmosis system is an effective technology to reduce arsenic and other contaminants in residential water supplies.
• Maintaining water quality requires a combination of testing and appropriate treatment technology configured for your household needs.

Where this information comes from

Source: USGS groundwater sampling. Sampled 2026-01-26. 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 120UFAQ aquifer (Highlands County): 3 results from 2 wells, median 0.27 ug/L, range 0.22-0.28 ug/L; none above any federal threshold

The documented solution

1400 GPD Commercial Reverse Osmosis