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Seasonal and Multi-Year Variation in Manganese Sampling

Government records from six wells in Cleveland County's aquifer 318GRBR provide manganese results collected from May 7, 2012, through May 1, 2013. The samples, taken at depths from 360 to 698 feet, show manganese concentrations fluctuated between 0.24 and 10.7 micrograms per liter (ug/L) during this period. These data suggest some variation over months to a year but do not establish trends beyond this timeframe.

Interpreting Detected, Median, and Range in the Sampling Record

Within 41 samples, manganese was detected in 28 and below the reporting limit in 13. The median value, 0.59 ug/L, represents the midpoint concentration of all results with detected values included. The range describes the lowest and highest measured levels, indicating variability in the aquifer’s manganese content across locations and times within Cleveland County.

Comparing Cleveland County’s Data With Adjacent Areas

Without referencing any specific neighboring counties, it is important not to overinterpret manganese data between areas. Differences in geology, depth of wells, and sampling times can affect concentrations. A higher median or wider range in one region does not directly predict conditions in Cleveland County or any individual household well.

Manganese Levels and Federal Standards: What the Data Indicates and Does Not

None of the manganese results for Cleveland County wells exceeded any federal health-based or secondary standards. This confirms that manganese presence in the local aquifer, while measurable, does not constitute a regulatory violation or direct health hazard. Instead, manganese primarily contributes to water aesthetics such as taste and staining potential.

Understanding Certified Laboratory Tests for Manganese

A certified laboratory test for a household water sample will report manganese concentration usually in micrograms per liter or milligrams per liter. Such a test reflects the specific well or tap water quality. It will also indicate if the level is below detection, detected, or quantified. This report helps identify whether manganese may be a cause of metallic taste in that household.

Information to Gather Before Seeking Treatment Advice

Before considering treatment options, the homeowner should note any laboratory results specific to their water source, including manganese levels. They should also record water usage patterns, symptoms such as metallic taste occurrence frequency, and any other water quality concerns. This information supports tailored recommendations.

One documented treatment solution is the Fleck Metallic-Tasting Water Filter, which ships ready to configure for residential use in homes like those in Cleveland County. This system addresses metallic taste resulting from manganese and related factors.

Recommended Next Step to Resolve the Question

To determine the right treatment class for their household, the homeowner should order a certified laboratory test measuring manganese concentration in their own water supply. A reading that confirms elevated manganese levels relative to taste thresholds would support selecting a specialized treatment system such as the Fleck Metallic-Tasting Water Filter. Without a specific test result, regional data provides only general guidance.

Where this information comes from

Source: USGS groundwater sampling. Sampled 2013-05-01. 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 Manganese in the 318GRBR aquifer (Cleveland County): 41 results from 6 wells, median 0.59 ug/L, range 0.24-10.7 ug/L; none above any federal threshold