How to compare this area's record with a neighbouring county's without overreading it
It's common to assume that fluoride detected in one area closely predicts the condition in a nearby county or in your household well. However, regional fluoride concentrations can vary significantly depending on local geology and aquifer characteristics. For Grafton County's aquifer 112SRFD, government data show fluoride was measured at low levels between 0.02 and 0.3 mg/L. When comparing this to an adjacent county, it's important not to assume your water matches theirs exactly. Each area's groundwater chemistry depends on specific local factors, so regional data serve as a guide but not an exact match for your well.
What 'detected', 'median' and 'range' mean in the sampling record on this page
The U.S. Geological Survey collected three fluoride samples from separate wells 73 to 174 feet deep in this Grafton County aquifer from June to July 2017. All results detected fluoride, with a median concentration of 0.07 mg/L and a range from 0.02 to 0.3 mg/L. 'Detected' means the instruments measured fluoride at or above the reporting level, but it is not a finding of unsafe water or a violation of any limit. The median represents the middle value in this small dataset, while the range shows the lowest and highest values found. These numbers indicate typical fluoride levels in this aquifer but do not reflect any one specific well's condition.
How the documented treatment technology removes or neutralises the constituent
The Pentair Fluoride Filter is designed to reduce fluoride concentrations in residential water. It utilizes specialized filtration media that adsorbs fluoride ions, lowering their presence in water entering the home. This system ships ready to configure for your household needs, providing a reliable method to manage fluoride based on your own water test results. Because fluoride levels vary by well, testing your water is the essential first step before using this treatment technology.
How sample depth, well depth or source type changes what a reader should expect
In this region, the sampled wells ranged from 73 to 174 feet deep. Well depth influences groundwater chemistry because deeper wells often access older, more geochemically distinct water. Shallow wells might show different fluoride levels due to surface influences or different rock formations. Source type also matters; private wells tap local aquifers, while public systems may blend multiple sources. Understanding your specific well characteristics helps interpret how regional data relate to your water’s fluoride content.
What the measured range means against the relevant federal standard, and what it does not mean
The federal standard for fluoride in drinking water is 4.0 mg/L, intended to prevent dental fluorosis and protect health. The Grafton County aquifer samples measured fluoride well below this level, from 0.02 to 0.3 mg/L. This confirms that fluoride concentrations in these wells are low relative to the federal threshold. These measurements do not indicate any violation or unsafe condition; rather, they provide a context for understanding regional fluoride presence. Individual well testing is necessary to determine your home's exact fluoride level.
How public-system records differ from private-well testing in what they establish
Public water system monitoring reports fluoride levels averaged over large service areas and often multiple sources. These records represent regulatory compliance but may not capture localized variations. In contrast, private-well testing offers specific data for your water but requires independent sampling and laboratory analysis. Use the regional sampling data from government sources as a background reference, and test your well water directly to determine precise fluoride concentrations for your household.
In summary, the fluoride data for Grafton County's aquifer 112SRFD come from three wells sampled mid-2017, showing low fluoride levels well below federal limits. This regional snapshot is useful background but cannot replace personal water testing. After testing, the Pentair Fluoride Filter provides a documented treatment option to reduce fluoride as needed. Government data details are available from the U.S. Geological Survey monitoring location 440417072002501.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2017-07-18. 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 Fluoride in the 112SRFD aquifer (Grafton County): 3 results from 3 wells, median 0.07 mg/L, range 0.02-0.3 mg/L; none above any federal threshold