If you consider how many samples and wells underlie Lake County’s arsenic data
The U.S. Geological Survey has sampled arsenic concentrations in Lake County’s aquifer 110QRNR from three separate wells, with six total test results spanning from 2010 to 2023. These wells range in depth from 20 to 150 feet. Because the dataset is limited to these few wells, it offers an overview of arsenic presence in the area aquifer but not a definitive measure of any individual household well.
The median arsenic concentration in this limited sample set is 1.55 micrograms per liter, with values ranging from 1.0 to 5.1 micrograms per liter. Each measurement detected arsenic, but none exceeded federal arsenic standards. A small number of samples like this can indicate general trends in the aquifer but may not capture localized variations or spikes.
If your household size or usage pattern is larger or more variable
Larger households or properties with second homes and seasonal use should consider that arsenic treatment needs scale with water consumption. Systems with higher flow demands must handle the total arsenic load effectively to maintain consistent water quality. A residential arsenic filter system configured according to your daily water usage ensures proper contaminant reduction without overburdening the equipment.
Seasonal properties might not draw water continuously, which can affect how treatment equipment functions and maintains arsenic removal efficiency over time. Matching system capacity to your actual demand helps preserve performance whether your home is occupied year-round or intermittently.
If you compare public system records with private well testing
Public water systems regularly monitor arsenic and other constituents and report data representing water delivered to many users. These records indicate compliance with federal standards and the typical experience of customers, but they do not reflect the quality of private wells, which can differ substantially.
Private well owners are encouraged to perform certified laboratory tests on their own water to understand specific arsenic levels and other parameters. This direct testing is essential because area or aquifer data alone cannot confirm your well’s water quality.
If you seek to understand 'detected', 'median', and 'range' in these USGS sampling results
'Detected' means arsenic was measurable in all tested wells, indicating its presence in the aquifer. The 'median' is the middle value of the arsenic measurements, here 1.55 micrograms per liter, providing a central tendency estimate. The 'range' from 1.0 to 5.1 micrograms per liter shows variability among sampled wells.
These terms help summarize the data but do not imply any individual well must have these exact values. Detection does not imply safety concerns by itself — it is simply an observed measurement within the aquifer samples.
If you wonder what the measured arsenic range means relative to federal standards and what it does not mean
The federal maximum contaminant level for arsenic in drinking water is 10 micrograms per liter. None of the tested values from Lake County’s aquifer 110QRNR exceeded this health-based federal limit. This means that while arsenic is present, these samples do not indicate a violation or unsafe condition under federal guidelines.
However, the presence of arsenic, even below regulatory limits, may prompt households to consider treatment for peace of mind or to address localized conditions. Understanding that sample data reflects area conditions is important; it does not predict any single well’s water quality.
One documented treatment option configured for residential arsenic reduction is the Fleck Arsenic Filter. This system operates to reduce arsenic levels and can be selected aligned to your household water use, supporting effective reduction while accommodating your daily demand.
What the area data should not lead you to conclude
Do not assume your household water has arsenic concentrations matching those sampled wells in this area. Only a test from a certified laboratory of your own well water can determine specific arsenic levels. Likewise, detection in the aquifer samples does not imply a health violation or unsafe water in your home. Area data provides context but must be supplemented with individual testing to guide treatment decisions appropriately.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2023-08-08. 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 110QRNR aquifer (Lake County): 6 results from 3 wells, median 1.55 ug/L, range 1.0-5.1 ug/L; none above any federal threshold