Government groundwater sampling in Richland County, South Carolina, aquifer 211MDDF found copper present in most tested wells, with concentrations ranging from 0.24 to 13.0 micrograms per liter (ug/L) and a median of 0.685 ug/L. None of the measurements exceeded federal thresholds for copper in water.
Does Plumbing Material and Age Affect Copper Stains Separately from Water Source?
Copper stains in a home often come from the water reacting with your household plumbing, which may include copper pipes and fixtures. The age of your plumbing can influence how much copper leaches into your water after it leaves the aquifer. New or older copper plumbing may release differing amounts of copper, but this effect is separate from copper naturally present in the source water.
What Does the Range of Copper Concentrations Mean Compared to Federal Standards?
The copper levels found in sampled wells across Richland County were all below federal action levels designed to protect health. These levels are not safety violations; rather, they represent amounts measured in regional groundwater. This means the copper detected is at concentrations considered acceptable for consumption according to federal guidelines.
How Does Copper Enter Groundwater or Distribution Systems in This Area?
Copper can naturally enter aquifer water through the weathering of minerals in soils and rocks. In Richland County’s aquifer 211MDDF, groundwater sampled at depths between 9 and 140 feet showed variable copper concentrations, indicating natural geological variation. Additionally, water distribution systems and plumbing materials can contribute copper after water leaves the aquifer.
Does Copper Concentration Change with Seasons or Over Multiple Years?
The data collected between August 2011 and September 2016 shows some variation in copper levels in area wells, reflecting natural fluctuations over time. The range from 0.24 to 13.0 ug/L indicates copper concentrations do not remain constant but vary within a limited band with no clear seasonal pattern indicated by the sampling dates.
What Happens If Copper Stains Are Not Addressed Over Time?
Unaddressed copper stains can accumulate on sinks, bathtubs, fixtures, and plumbing, causing visible discoloration that can be difficult to remove. While these stains are primarily an aesthetic issue, persistent copper presence may also lead to minor corrosion in plumbing components, potentially affecting their longevity.
What Do ‘Detected,’ ‘Median,’ and ‘Range’ Mean in This Copper Sampling Record?
- Detected means copper was measured at or above the minimum level the instrument can reliably quantify in 22 of 30 samples.
- Median (0.685 ug/L) is the middle value of all measurements, showing central tendency but not the highest level found.
- Range (0.24 to 13.0 ug/L) shows the span from the lowest to the highest detected copper concentrations in the sampled wells.
These terms describe measurements across a sample of area wells; they do not reveal the copper concentration in any individual household’s water without specific testing.
For households in Richland County experiencing copper stains, assessing your water’s copper concentration through a certified water test is recommended. The C-Series Blue-Green Copper Stains Filter ships ready to configure and is designed to reduce copper-related staining based on your measured water demand, providing a practical step toward clearer fixtures and fixtures longevity.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2016-09-01. 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 211MDDF aquifer (Richland County): 30 results from 26 wells, median 0.685 ug/L, range 0.24-13.0 ug/L; none above any federal threshold