What Do the Terms 'Detected', 'Median', and 'Range' Mean in the Sampling Record on This Page?
Government water-quality data show fluoride was detected in all three samples collected within Marquette County's aquifer 112SDGV. Detection means fluoride was measurable, but it does not indicate any safety issue or legal violation. The median concentration of 0.04 mg/L represents the middle value among these samples, while the range from 0.04 to 0.05 mg/L shows the span of measurements recorded.
How Does Fluoride Enter Groundwater or the Distribution System in This Region?
In Marquette County, fluoride naturally occurs in groundwater due to local geological formations. As water passes through mineral-containing rocks at depths of approximately 41 to 67 feet, small amounts of fluoride dissolve into the water. The recorded fluoride levels reflect this natural process rather than contamination from external sources.
How Many Samples and Wells Stand Behind These Figures, and What Does a Small Sample Size Mean?
These figures come from three sample results collected between 2013 and 2024 from two different wells within aquifer 112SDGV. While the data provide an overview of fluoride presence in the region's groundwater, the limited sample size means it offers only a snapshot rather than a comprehensive profile. Individual well water may differ, so household testing is essential for accurate fluoride assessment.
How Should a Homeowner Interpret the Record's Median and Range?
A median fluoride level of 0.04 mg/L falls well below federal fluoride limits for drinking water, indicating no recorded exceedances in these samples. The narrow range from 0.04 to 0.05 mg/L suggests consistent low-level fluoride presence in the tested wells. This information helps homeowners understand general regional fluoride conditions but should not replace testing of their own water supply.
What Questions Might a Commercial or Industrial Operator Add That a Household Does Not?
Operators managing large or variable water demands may inquire about treatment capacity and system design considerations for fluoride removal at scale. They often require detailed performance data and maintenance schedules tailored to higher flow rates and operational complexity, beyond typical household use cases.
What Should a Homeowner Write Down Before Seeking Treatment Advice?
- Results of a recent water test specific to their well or supply
- Information about water usage rates and household size
- Any known water quality concerns besides fluoride
- Local water source details such as well depth and aquifer identity
Having these details clarifies treatment needs and helps select appropriate equipment.
For households in Marquette County relying on aquifer 112SDGV, the Fleck Fluoride Filter offers a ready-to-configure solution for addressing fluoride concerns detected through testing. It employs proven water treatment technology to reduce fluoride concentrations as needed.
The fluoride data summarized here represent three samples collected from two wells in Marquette County's 112SDGV aquifer between 2013 and 2024, reported by the U.S. Geological Survey groundwater monitoring program.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2024-08-21. 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 Fluoride in the 112SDGV aquifer (Marquette County): 3 results from 2 wells, median 0.04 mg/L, range 0.04-0.05 mg/L; none above any federal threshold