Interpreting the Median and Range of Arsenic Found in Local Wells
In Lake County, the 110QRNR aquifer is a significant underground water source feeding many private wells. According to the U.S. Geological Survey’s sampling between 2010 and 2023, arsenic was detected in all six measurements from three wells ranging from 20 to 150 feet deep. The median concentration found was 1.55 micrograms per liter (ug/L), with a range spanning from 1.0 to 5.1 ug/L. This means that half of the results were below 1.55 ug/L and half were above, with individual samples showing some variation within the stated range.
For a homeowner, these numbers are a starting point to understand potential arsenic presence in groundwater near their property. However, these figures reflect area-wide data, not a specific household’s water. To know the exact arsenic level in your own supply, a certified laboratory test of your well or tap water is necessary.
Maintenance Rhythm of the Fleck Arsenic Filter for Home Use
The Fleck Arsenic Filter system, designed for home water treatment, operates with a straightforward maintenance schedule. Its technology removes arsenic effectively by filtering water through specialized media. Routine upkeep typically involves replacing filter media and checking system performance at intervals recommended by the manufacturer. Maintaining the filter ensures continued removal efficiency and reliable water quality. The system ships ready to configure for your household’s needs, enabling direct purchase without requiring professional setup services.
Understanding the Range Versus Federal Arsenic Standards
None of the sampled wells in Lake County’s 110QRNR aquifer have arsenic levels above the U.S. Environmental Protection Agency’s (EPA) maximum contaminant level (MCL) for arsenic, which is set at 10 ug/L. The range from 1.0 to 5.1 ug/L detected in this area is well below that federal threshold. This indicates no violation of the standard has been recorded by these tests. However, detecting arsenic—even below the MCL—means the constituent is present and may warrant attention, especially if your own water test shows higher values or rising trends.
How Public-System Sampling Differs from Private Well Testing
Government sampling reflects arsenic levels averaged across several wells representing the local aquifer, but it does not establish the water quality of any single home’s well or tap. Public water systems generally monitor compliance with federal standards and report results publicly. Private well owners must test their own water independently to understand their specific conditions since groundwater composition can vary widely over short distances and depths. Local records serve as a useful guide but do not replace direct testing of household water sources.
Distinguishing Aesthetic Secondary Standards from Health-Based Arsenic Limits
Arsenic is regulated by a health-based federal standard, primarily because of its long-term effects when present at elevated levels. This differs from aesthetic secondary standards that address issues like taste, staining, and odor, which do not apply to arsenic. In Lake County’s 110QRNR aquifer, arsenic levels detected are below health-based limits but still require awareness. The EPA’s arsenic standard is designed to protect public health, whereas secondary standards address water appearance or household system impacts.
The Impact of Plumbing Material and Age on Arsenic Levels
The type and age of household plumbing generally do not affect arsenic concentrations in water. Arsenic originates from the source groundwater, not from pipes or fixtures. However, old or corroded plumbing may influence other water quality parameters like metals, but arsenic presence depends on aquifer characteristics and well construction. Understanding this distinction helps clarify that treatment focus should be on source water contaminants rather than household plumbing modifications.
What You Should NOT Conclude From Area Sampling Data
The USGS data for Lake County’s 110QRNR aquifer provides valuable regional context but does not determine your home’s water arsenic level. Presence of arsenic in local wells does not mean your water exceeds any federal standard or is unsafe. Only a certified test of your own well or tap water accurately establishes your water’s arsenic concentration and guides treatment decisions. For arsenic removal, products like the Fleck Arsenic Filter ship ready to configure to suit household needs and provide reliable reduction when needed.
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