What Regional Data Tells You About Manganese in Your Water
Government sampling from the U.S. Geological Survey in Connecticut's FIPS 170 area, specifically aquifer 112DFSF, provides a snapshot of manganese levels in local groundwater. This data is based on three samples collected between 2011 and 2017 from two wells approximately 19 to 24 feet deep. The samples detected manganese concentrations ranging from 0.6 to 180.0 micrograms per liter, with a median of 0.8 micrograms per liter. However, these figures represent area averages and cannot define the manganese content in your home's water without private testing.
How Manganese Enters Groundwater in This Connecticut Aquifer
Manganese is naturally occurring in the soil and rocks of the 112DFSF aquifer region. Over time, it dissolves into groundwater as water interacts with the geological materials underground. This process is influenced by factors such as mineral composition and redox conditions within the aquifer. Manganese presence in water depends on these natural geochemical interactions, not on human contamination here.
Interpreting the Measured Manganese Range and Relevant Federal Standards
The detected manganese levels in this aquifer are well below federal health-based guidelines. None of the samples exceeded any federal manganese threshold. It is important to understand a detection or concentration level does not imply a violation or unsafe water. Instead, manganese at certain concentrations can affect water's taste, stain plumbing fixtures, or discolor laundry, which are aesthetic considerations addressed by secondary standards, not safety standards.
Identifying Household Signs Related to Manganese in Water
Households dealing with manganese may notice subtle discoloration of water, such as a faint brown or black tint, or staining on sinks, tubs, or laundry. These signs suggest manganese presence but do not alone confirm a health risk or specific manganese concentration. Other common water quality issues can cause similar symptoms, so professional water testing is advised to confirm manganese and quantify its level.
Influence of Sample and Well Depth on Expected Manganese Levels
The sampling done in FIPS 170 focused on wells 19 to 24 feet deep, which is relatively shallow for groundwater. Deeper wells may exhibit different manganese concentrations due to variations in geochemical conditions with depth. Therefore, the government data applies primarily to groundwater at depths comparable to those sampled. If your water source differs significantly in depth or type, manganese levels could also differ.
Understanding Certified Laboratory Reports for Manganese Analysis
A certified laboratory test for manganese will report the concentration in micrograms per liter (µg/L) or milligrams per liter (mg/L). The report will include detection limits and whether the manganese was detected or below those limits. Reading these results requires comparing the reported values against federal or local aesthetic guidelines to understand potential impacts and whether treatment is warranted.
Comparing Public-System Records and Private-Well Testing for Manganese
Public water system reports provide regular monitoring data reflecting compliance with health-based standards for many constituents, including manganese. These records typically show no health-based violations for manganese in this region. In contrast, private wells are not subject to routine testing and can vary widely. Therefore, private well owners should obtain individual water tests to determine their specific manganese levels and treatment needs.
Summary and Further Resources
The manganese data discussed here is drawn from area groundwater sampling in Connecticut's FIPS 170 aquifer 112DFSF, reflecting conditions at sampled wells 19 to 24 feet deep. This information helps contextualize manganese presence but does not replace direct testing of your home's water. For more detailed groundwater data, visit the U.S. Geological Survey site monitoring location 412422072460401.
For residential water treatment addressing manganese, the C-Series Black Manganese Stains Filter ships ready to configure as a practical option to reduce manganese-related aesthetic effects when your water test shows a relevant presence.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2017-09-06. 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 112DFSF aquifer (FIPS 170): 3 results from 2 wells, median 0.8 ug/L, range 0.6-180.0 ug/L; none above any federal threshold