Which Fixtures, Appliances, or Processes Are Affected First and Why
Metallic taste in household water is often noticed initially when drinking water from taps or using water in beverages and cooking. Fixtures such as kitchen faucets and appliances like coffee makers or ice machines may reveal this taste most prominently because they come into direct contact with water consumed or tasted frequently. This happens because copper, a metal that can be naturally present in groundwater or leach from plumbing components, may impart an unusual taste when in contact with water, especially during flow or heating.
How Many Samples and Wells Stand Behind the Figures, and What a Small Sample Means
The information on copper levels in water from Connecticut’s aquifer identified as 112DFSF comes from a total of 24 samples taken from 20 separate wells over nearly six years, from 2011 through 2017. These wells ranged in depth from 10 to 155 feet. While this provides a snapshot of copper presence in the area, it is important to recognize that 24 samples represent a modest data set relative to the number of households and wells served. A smaller number of samples means the recorded values show general trends but cannot precisely predict copper levels in any single home’s water without direct testing.
How Public-System Records Differ from Private-Well Testing in What They Establish
Government-monitored data from wells in the 112DFSF aquifer give an overview of copper concentrations across the region but do not substitute for testing private well water. Public or government-sampled wells serve as reference points, reflecting groundwater quality within a larger area rather than individual household water conditions. Private well owners must sample their own water to determine specific copper levels since local plumbing materials, well depth, and usage can cause variation. Public data are useful for identifying potential concerns and trends but cannot confirm the presence or absence of metallic taste in one household.
A Worked Example: Reading the Record's Median and Range as a Homeowner Would
The median copper concentration found in sampled wells of the CT aquifer 112DFSF is 2.1 micrograms per liter (ug/L), with individual sample results ranging from 0.22 to 48.5 ug/L. This median means half the samples had copper levels below 2.1 ug/L and half above. The range shows that values fluctuate significantly between wells. For a homeowner experiencing metallic taste, this means the well water could be at the lower end of the range or near the higher end. The presence of copper detected does not directly indicate a problem but warrants personalized water testing to understand how their specific water compares.
What 'Detected,' 'Median,' and 'Range' Mean in the Sampling Record on This Page
'Detected' means copper was measured using reliable instruments in 21 of 24 samples, while 3 samples were below the level the instrument could report. It is not a statement about safety—detection simply confirms copper presence. The 'median' is the middle value that divides the data set into two halves, providing a central tendency of copper concentration across wells. The 'range' describes the span from the lowest to highest recorded copper concentration among samples. No federal threshold for copper was exceeded in these samples, indicating that although copper was found, the levels did not surpass regulatory limits intended to prevent health risks.
The C-Series Metallic-Tasting Water Filter is designed to address concerns about metallic taste potentially related to copper presence by filtering water after testing confirms the need. It ships ready to configure as a solution for households seeking to improve water taste resulting from metals detected in local groundwater.
This summary reflects copper sampling results in 20 wells from the CT aquifer 112DFSF area reported by the U.S. Geological Survey. For detailed data, visit the official government source at waterdata.usgs.gov.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2017-09-05. 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 Copper in the 112DFSF aquifer (FIPS 110): 24 results from 20 wells, median 2.1 ug/L, range 0.22-48.5 ug/L; none above any federal threshold