How Public-System Records Differ from Private-Well Testing in What They Establish
Government sampling reflects area aquifer conditions, not individual wells
The U.S. Geological Survey samples wells across Roane County′s aquifer 317DKRD to provide general information on groundwater quality. These results represent multiple wells sampled in a defined area but do not specify manganese levels in any single household’s water supply. Private testing is necessary to determine your home's specific manganese concentration.
Sampling depth does not indicate your well’s exact depth or water composition
The sampled wells ranged between 71 and 460 feet deep. Your well’s depth and conditions may differ, affecting manganese presence. The government data offers a regional snapshot rather than a direct measure of your tap water.
What “Detected”, “Median” and “Range” Mean in the Sampling Record on This Page
Detection simply means manganese was measured, not that it’s a problem
All four samples detected manganese, ranging from 5.14 to 84.1 micrograms per liter (µg/L). Detection indicates the presence of manganese but does not imply levels exceed any health or safety thresholds.
The median value shows a typical concentration but not your exact level
A median of 7.065 µg/L means half the samples were above and half below this concentration. This statistic summarizes regional data but cannot predict your own water’s manganese content.
What the Measured Range Means Against the Relevant Federal Standard, and What It Does Not Mean
No sample exceeded federal manganese standards according to USGS data
Federal guidelines include health-based and secondary aesthetic standards relevant to manganese. None of the Roane County samples from aquifer 317DKRD surpassed these benchmarks, indicating no federal-level concern detected in this dataset.
Range variability shows natural differences in manganese but not risk levels at your location
The wide range from about 5 to 84.1 µg/L reflects natural variability due to geology and well conditions but is not evidence of contamination or an exceedance requiring action without your own water test.
Why Aesthetic Secondary Standards Differ from Health-Based Limits, Applied to This Constituent
Secondary standards relate to taste, staining, and corrosion, not safety
For manganese, secondary standards focus on water appearance and potential for staining fixtures or laundry. These are not health safety limits. Exceeding secondary thresholds may warrant treatment for aesthetics, not because the water is unsafe.
Knowing your water’s manganese level helps decide if aesthetic treatment is desired
If you experience discoloration or staining in your home, testing your specific well or tap water will clarify if manganese is the cause and how treatment may improve appearance.
What Changes for a Large Household, a Second Home, or a Seasonal Property
Water use patterns affect treatment needs and equipment sizing
Homes with higher water demand or intermittent use, such as seasonal properties, may require tailored solutions to manage manganese effectively. Understanding daily usage helps in planning treatment capacity.
Treatment options like the C-Series Black Manganese Stains Filter ship ready to configure for various household sizes
This system is designed to address manganese-related water issues and can accommodate different volumes and usage patterns to improve water quality at the tap.
In summary, the U.S. Geological Survey’s 2018 sampling in wells from 71 to 460 feet deep within Roane County′s aquifer 317DKRD found manganese was detected in all samples with a median of 7.065 µg/L and a range of 5.14 to 84.1 µg/L. No measured value exceeded applicable federal standards. These findings provide a regional context but do not replace testing your own water. For detailed information, visit the official USGS monitoring location at waterdata.usgs.gov.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2018-07-18. 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 Manganese in the 317DKRD aquifer (Roane County): 4 results from 4 wells, median 7.065 ug/L, range 5.14-84.1 ug/L; none above any federal threshold