Pentair Blue-Green Copper Stains Filter

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This week, you need to decide what class of treatment suits your household's copper stain concerns based on the documented water quality in Grant County aquifer 112GLCV.

Common Belief: Copper Levels in Local Wells Stay Consistent Year-Round

The U.S. Geological Survey sampled 12 wells in Grant County's aquifer 112GLCV between July 2010 and September 2023. Over this multi-year period, 26 copper concentration results ranged from 0.73 to 38.0 micrograms per liter (µg/L), with a median of 1.7 µg/L. Approximately half the results detected copper above reporting thresholds, while the rest were below those limits. This range reflects natural fluctuations over seasons and years rather than a single constant value.

Common Belief: The Median Copper Level Represents What a Household Should Expect

Interpreting the median of 1.7 µg/L helps frame what homeowners might commonly face. For example, half the samples measured less than this level, and half were higher. The highest recorded value was 38.0 µg/L, about 20 times the median, showing occasional spikes within the sampled wells. But these numbers are from various wells sampled at depths between 21 and 112 feet, not from your individual well. To know your household's exact copper level that could cause staining, having your own water tested is essential.

Common Belief: Grant County’s Copper Data Can Be Directly Compared to Nearby Counties

While it’s reasonable to reference copper sampling data from neighboring areas to get a broader view, differences in geology and aquifer characteristics mean direct comparisons should be cautious. For example, similar sampling in adjacent counties may report different ranges and medians. Using Grant County's aquifer 112GLCV data as the primary reference ensures your treatment decision aligns with your area's specific conditions.

Common Belief: Any Detection Above Secondary Standards Is a Health Concern

Federal guidelines classify copper under an aesthetic secondary standard focusing on taste, staining, and corrosion, not a health-based limit. None of the 26 samples surpassed any federal safety thresholds. Detection alone does not indicate unsafe water or a violation. Rather, copper presence at the levels found may cause blue-green staining on sinks and fixtures, which is often the trigger for treatment consideration.

Common Belief: You Can Choose the Right Treatment Without Specific Household Water Demand or Measurements

Before seeking treatment advice, write down relevant details: your household water use, staining severity, plumbing type, and if possible, results from your own copper water test. These factors help select a treatment system with capacity and features tailored to your needs.

Common Belief: Secondary Standards Are Health Limits

Aesthetic secondary standards like those for copper address appearance and plumbing impact rather than health risks. Copper can cause characteristic blue-green stains on porcelain and metal surfaces, detracting from appearance and causing maintenance issues. Understanding this distinction clarifies the treatment goal is stain control and water appearance improvement, not a health remediation.

For households in Grant County aquifer 112GLCV facing copper stains, the Pentair Blue-Green Copper Stains Filter ships ready to configure and is designed to meet demand levels you determine through your household use assessment. This documented system provides an effective technical approach to controlling copper-related staining based on your measured conditions.

Where this information comes from

Source: USGS groundwater sampling. Sampled 2023-09-28. 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 112GLCV aquifer (Grant County): 26 results from 12 wells, median 1.7 ug/L, range 0.73-38.0 ug/L; none above any federal threshold