How Many Samples and Wells Stand Behind the Figures, and What a Small Sample Means
The manganese data for Sussex County comes from 31 groundwater samples collected over a 13-year period, from 2011 to 2024. These samples originate from 7 different wells tapping the 121BVDM aquifer, with depths ranging from 11 to 60 feet. Although this number of samples provides useful regional insight, it represents only a subset of the total wells in the area. The limited number of wells and samples means conclusions should be viewed as general trends rather than definitive statements about any individual well or home water supply.
How the Constituent Enters Groundwater or the Distribution System in This Region
Manganese naturally occurs in many geological formations and can dissolve into groundwater as it flows through aquifer materials. In Sussex County’s 121BVDM aquifer, the manganese presence is influenced by local mineralogy and water chemistry conditions that control manganese solubility. It can enter residential water through private wells drawing directly from this aquifer, and in some cases may be present in municipal water sourced locally. Understanding this natural origin is important when considering treatment options.
What the Measured Range Means Against the Relevant Federal Standard, and What It Does Not Mean
The manganese concentrations measured in Sussex County wells range from 0.93 to 132.0 micrograms per liter, with a median of 2.65 micrograms per liter. None of these values exceed any federal health-based thresholds for manganese. It is important to note that detection of manganese is not a violation or indication of unsafe water. Instead, manganese levels influence aesthetic qualities like taste, staining potential, and discoloration, which may justify treatment depending on household priorities.
What 'Detected', 'Median' and 'Range' Mean in the Sampling Record on This Page
The term "detected" means the measurement instrument found manganese in 29 of the 31 samples. The "median" value represents the middle point where half of the samples had concentrations above 2.65 micrograms per liter and half below. The "range" from 0.93 to 132.0 micrograms per liter shows variability among wells and sampling times but does not imply an upper safety limit was crossed. These statistics describe the area's groundwater conditions, not any one well or home.
A Worked Example: Reading the Record’s Median and Range as a Homeowner Would
As a homeowner evaluating manganese levels in Sussex County, the median of 2.65 micrograms per liter suggests that many wells in the aquifer have low manganese presence. However, occasional higher readings reaching 132.0 micrograms per liter mean your own well could have higher or lower manganese concentration. Since these are general area samples, testing your home water specifically is necessary to make informed treatment decisions.
How Public-System Records Differ from Private-Well Testing in What They Establish
Public water systems often conduct regular manganese monitoring and must meet regulatory standards, offering documented water quality for consumers. Their records cover treated water supplies but do not reflect private well conditions. Private wells draw directly from the aquifer without centralized treatment. Therefore, the regional data serves as an informative background, but individual well testing is required to understand your household’s manganese level and whether treatment is indicated.
In response to manganese concerns, household water treatment options include technologies like the C-Series Black Manganese Stains Filter, which ships ready to configure and is designed to reduce manganese-related staining and discoloration effectively.
What You Should Not Conclude from Area Data
While the government’s sampling in Sussex County provides valuable baseline information, it does not indicate the exact manganese concentration in your well or tap water. Detection in this context is not a violation or a statement of risk. Only a water test from your household can establish your specific manganese level. Decisions about water treatment should be based on your well’s test results and personal water quality goals rather than area median or range figures alone.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2024-08-27. 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 121BVDM aquifer (Sussex County): 31 results from 7 wells, median 2.65 ug/L, range 0.93-132.0 ug/L; none above any federal threshold