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What does the measured iron range in Portage County's 100SDGV aquifer tell you, and what does it not?

Between August 2011 and August 2024, groundwater sampling overseen by the U.S. Geological Survey in Portage County’s 100SDGV aquifer reported iron levels ranging from 3.8 to 2860 micrograms per liter (ug/L) across 59 tests from 27 wells. Fourteen of these results showed iron detected above the instrument’s reporting limit, while 45 were below it. No iron readings in this dataset exceeded federal limits, which means the levels found do not indicate a violation of health-based standards. However, this does not imply all wells in the area have identical iron concentrations; each well’s water quality can vary. Detection signifies that iron was measurable by testing equipment—not that it is unsafe or necessarily troublesome.

How many wells and samples underpin these measurements, and what should you consider about sample size?

The 59 samples represent a substantial but not exhaustive snapshot, coming from 27 wells at depths between roughly 12 to 140 feet. This diversity provides a useful regional view but cannot substitute for testing your own well water to confirm specific conditions. A smaller number of samples may leave variability less defined, so it's important to understand that individual well results might differ significantly depending on local geology, well depth, and water use.

What should households with larger water demands or seasonal use keep in mind?

Larger households or those with seasonal occupancy can experience different water needs affecting treatment system performance. Systems designed for typical residential consumption may require adjustments to handle more extensive daily water use or periods of inactivity characteristic of seasonal homes. The capacity of any water treatment equipment, including the grain capacity specifying the volume of iron or other contaminants it can handle before maintenance is needed, plays a crucial role in matching household demand.

How does the data show seasonal or multi-year variation in iron levels?

Sampling over more than a decade indicates some wells experience fluctuation in iron concentration over time. The range from just above detection to over 2800 micrograms per liter across different dates and locations highlights natural temporal and spatial variability in groundwater quality within the aquifer. Understanding these variations can help in selecting a treatment that adapts to changes rather than a fixed condition measured once.

How does the water you use change once the Fleck Complete Well System is operational?

The Fleck Complete Well System, featuring a grain capacity of 32000, is designed to reduce iron and related compounds effectively. Once configured, it conditions the water to improve clarity and taste, addressing common issues associated with elevated iron such as staining or metallic flavor. Because it operates based on measurable capacity rather than fixed concentrations, it provides flexibility in managing water quality variations typical of Portage County well conditions.

By reviewing regional iron data, sample size, household water demands, and water quality trends over time, you gain a comprehensive view of how to approach treatment choices. Confirming your own water’s condition through testing will ensure the Fleck Complete Well System fits your needs and sustains your household’s water quality effectively.

Where this information comes from

Source: USGS groundwater sampling. Sampled 2024-08-20. 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 Iron in the 100SDGV aquifer (Portage County): 59 results from 27 wells, median 5.55 ug/L, range 3.8-2860.0 ug/L; none above any federal threshold