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How Public-System Records Differ from Private-Well Testing in What They Establish

USGS Data Reflects Area Aquifer Conditions, Not Individual Wells

The U.S. Geological Survey collected arsenic data from nine wells in Lee County's 230SDMR aquifer during 2012. These samples indicate arsenic was measurable in every tested well, but none exceeded federal thresholds. This information describes the aquifer broadly—it does not specify arsenic levels in your own household well or tap water. To understand your home's water quality, direct testing of your water is necessary.

Public Records Inform Regional Averages, Not Household Risk

The median arsenic value was 1.1 micrograms per liter, with individual values ranging from 0.14 to 4.8 micrograms per liter across sampled wells at depths from 100 to 325 feet. While this shows arsenic is present at low levels in the aquifer, these figures do not diagnose safety or risk for any single household.

What Distinguishes This Problem from the Two Problems Most Often Confused with It

Arsenic Is a Naturally Occurring Element, Not a Microbial Contaminant

Unlike bacteria or viruses that can cause immediate health issues, arsenic is a chemical element that can appear naturally in groundwater due to geological conditions. Its presence is not indicative of biological contamination but rather a long-term chemical factor.

Arsenic Differs from Iron and Manganese by Its Potential Health Impact

Common water issues such as iron or manganese often affect taste, odor, and staining but are generally aesthetic concerns. Arsenic can have health implications with prolonged exposure, which means addressing it may be a priority if confirmed in household water.

What Changes for a Large Household, a Second Home, or a Seasonal Property

Larger or Multiple Properties Increase Water Treatment Volume Needs

A household with more occupants or additional properties drawing from the same well will require treatment equipment sized to handle increased water demand. This ensures arsenic levels remain reduced consistently for all users.

Seasonal Vacation Homes May Need Retesting After Periods of Inactivity

Water quality, including arsenic concentration, can vary over time. For seasonal properties, periodic water testing is recommended to confirm current conditions before regular use resumes.

What 'Detected', 'Median' and 'Range' Mean in the Sampling Record on This Page

'Detected' Means Arsenic Was Measured—Not That the Water Is Unsafe

All nine samples found arsenic at levels measurable by laboratory instruments. Detection does not imply a violation of any safety standard or that the water is unsafe to use. It simply confirms arsenic's presence.

'Median' Is the Middle Value of the Sample Set

The median arsenic concentration of 1.1 micrograms per liter means half the wells had values above this number and half below it. This helps summarize the typical arsenic level in the area’s sampled wells.

'Range' Shows the Spread Between Lowest and Highest Values

Values ranged from 0.14 up to 4.8 micrograms per liter among the nine wells. This spread shows variability within the aquifer, illustrating that arsenic concentrations can differ significantly from well to well.

What Happens When This Problem Is Left Untreated for Years, Stated Without Exaggeration

Long-Term Exposure to Elevated Arsenic May Affect Health

If arsenic is present at levels above recommended guidelines in household water, continued consumption or use could increase risks of certain health effects. The data here show low levels in the aquifer, but individual testing is necessary to confirm your situation.

No Immediate Effects Occur from Typical Lee County Aquifer Levels

Because the sampled arsenic concentrations were all below federal thresholds, water drawn from this aquifer generally does not pose immediate health risks from arsenic. Still, awareness and testing remain important.

How Seasonal or Multi-Year Variation Shows in the Record (Dates and Ranges Given)

Sampling Dates Spanned Less Than a Month in Spring 2012

USGS data were collected from May 14 to June 8, 2012, providing a snapshot of arsenic levels during that period. Seasonal changes occurring outside this window are not reflected in these samples.

Multi-Year Trends Require Broader Data Sets

With only nine samples from a limited timeframe, this record does not show longer-term trends. If arsenic levels vary over years or seasons, household water testing at multiple points in time is the best way to observe changes.

Understanding arsenic presence in Lee County’s 230SDMR aquifer involves recognizing regional sampling data versus household water quality. This overview clarifies terms like detected, median, and range, and distinguishes arsenic from other common water concerns. Testing your own water is essential to determine if treatment is needed. For households requiring arsenic reduction, the Fleck Arsenic Filter ships ready to configure to manage arsenic levels effectively.

Where this information comes from

Source: USGS groundwater sampling. Sampled 2012-06-08. 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 230SDMR aquifer (Lee County): 9 results from 9 wells, median 1.1 ug/L, range 0.14-4.8 ug/L; none above any federal threshold