Fleck Arsenic Filter

Buy Now

View full details

1. Understanding Sample Size and Well Variation in Local Arsenic Data

The U.S. Geological Survey (USGS) has collected arsenic samples from four distinct wells within the Johnson County area aquifer 111ALVM. These five measurements, taken over a multi-year period from 2011 to 2017, recorded arsenic concentrations ranging from 0.06 to 3.2 micrograms per liter (µg/L), with a median value of 1.5 µg/L. While this dataset provides a regional snapshot, it is important to recognize that the small number of samples and the variation in well depths — ranging between 17 and 177 feet — mean individual wells may have different arsenic levels. Therefore, these figures should not be used to assume the exact condition of a specific household’s water.

2. Plumbing Materials and Their Influence Separate From Source Water Quality

Arsenic presence in Johnson County’s water primarily stems from natural elements in the aquifer rather than household plumbing. The composition and age of plumbing materials can affect other water quality factors, but do not alter the arsenic content originally found in groundwater. Understanding this distinction helps homeowners pinpoint the source of arsenic and distinguish it from other water issues, such as metals leached from pipes.

3. Differentiating Arsenic From Similar Water Concerns

Arsenic is often confused with other contaminants or water characteristics like iron or manganese due to some overlapping effects, such as discoloration or taste changes. However, arsenic does not cause staining or odor. Recognizing these differences ensures proper focus on testing and treatment specifically for arsenic rather than unrelated issues.

4. Origin and Entry of Arsenic into Johnson County Groundwater

In Johnson County’s aquifer 111ALVM, arsenic enters groundwater through natural geologic deposits. It dissolves into water over time where certain rock types contain arsenic-bearing minerals. This natural release process is influenced by local geology and groundwater movement rather than human activity, explaining why arsenic levels detected remain below federal regulatory thresholds in government sampling for the area.

5. Special Considerations for Large or Seasonal Residences

Households with high water demand, multiple dwellings, or seasonal occupancy may face different treatment needs based on volume and usage patterns. Arsenic concentrations may remain stable but the capacity and configuration of treatment equipment should match these variations to maintain effective reduction and water availability.

6. Variability of Arsenic Levels Over Time in Government Monitoring

Sampling dates from 2011 to 2017 reveal some fluctuation in arsenic concentrations, with values consistently detected but ranging moderately. This reflects natural variability in groundwater chemistry rather than sudden contamination events. Recognizing this helps households anticipate potential changes and underscores the importance of periodic water testing to confirm arsenic levels in their own supply.

The data discussed represents five results from four wells sampled by the USGS within Johnson County aquifer 111ALVM, providing an area-wide overview rather than a household-specific assessment. For detailed water quality information, individual water testing is necessary. To address arsenic presence identified through testing, the Fleck Arsenic Filter ships ready to configure for residential use, offering a documented solution to reduce arsenic effectively from household water.

Where this information comes from

Source: USGS groundwater sampling. Sampled 2017-08-28. 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 111ALVM aquifer (Johnson County): 5 results from 4 wells, median 1.5 ug/L, range 0.06-3.2 ug/L; none above any federal threshold