Government groundwater samples taken across Sedgwick County, Kansas, from aquifer 112PLSC provide a clear regional snapshot of copper levels in local wells. According to the U.S. Geological Survey, 192 samples from 27 wells between 2010 and 2016 found copper detected only 5 times, with values ranging from 0.69 to 13.0 micrograms per liter (ug/L), and a median measurement of 1.0 ug/L. Importantly, none of these results exceeded any federal copper thresholds.
Comparing Sedgwick County's Copper Findings with Neighboring Areas Without Overreading
When looking at Sedgwick County's copper data, it is common to want to compare it with nearby counties or other aquifers. However, care is needed not to assume that differences in measurement are necessarily significant or indicate safety concerns. Variations can result from differences in the sampled wells' depths, locations, or sampling times. Therefore, while Sedgwick County's recorded copper range and median provide a regional context, they are not a direct indicator of an individual home's water quality or risk relative to nearby counties.
What Happens When Copper is Left Untreated Over Time
Copper is an essential trace element for health but can cause household challenges if present above certain taste, staining, or plumbing corrosion thresholds. Although the regional data does not show levels exceeding federal limits, long-term exposure to elevated copper in water may lead to blue-green stains on plumbing fixtures and potential metallic taste. For households seeking to avoid these issues, addressing copper presence proactively can prevent these minor but noticeable impacts.
Understanding 'Detected,' 'Median,' and 'Range' in the Sampling Record
The terms used in the sampling report each hold specific meaning:
- Detected means the test method measured copper at or above the instrument's reporting limit; it does not mean the water is unsafe or violates any standards.
- Median is the middle value of all copper measurements, showing a central tendency but not the full spread of potential concentrations.
- Range captures the lowest and highest copper values found among all samples, reflecting variability between wells but not consistent levels in any single location.
Together, these terms describe the aquifer's overall profile based on many wells rather than any single household.
A Worked Example: Interpreting the Median and Range for a Homeowner
Suppose a homeowner in Sedgwick County reads the median copper level is 1.0 ug/L and the range is from 0.69 to 13.0 ug/L. This means that in most wells sampled, copper was near 1.0 ug/L, but some wells showed higher readings up to 13.0 ug/L. Because these levels remain below federal copper thresholds, the homeowner's water may well be safe regarding copper content. However, since copper levels differ across wells, the homeowner would need a specific water test from their own source to know their exact situation.
Additional Questions Commercial or Industrial Users Add
While residential households focus on health and household effects, commercial and industrial users often ask additional questions, such as copper’s impact on manufacturing processes, equipment longevity, and regulatory compliance for discharge or product quality. They may require more frequent or specialized testing to manage copper levels effectively in their applications.
In summary, Sedgwick County's regional copper measurements show that copper is generally low and below federal concern thresholds in aquifer 112PLSC. Homeowners interested in confirming their individual water quality should conduct specific tests, while the Fleck Heavy Metals Filter offers a direct-purchase option to address detected heavy metals if needed. This approach walks through understanding the regional data, the meaning of key terms, the difference between detected levels and safety standards, and practical next steps for water management.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2016-09-15. 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 112PLSC aquifer (Sedgwick County): 192 results from 27 wells, median 1.0 ug/L, range 0.69-13.0 ug/L; none above any federal threshold