Fleck Black Manganese Stains Filter

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Dark spots or staining around taps are often the first sign of manganese presence for Logan County homeowners using water from aquifer 327KNWH. Recognizing these signs and knowing what regional data shows helps in deciding the right treatment approach.

How Sample Depth and Source Type Affect Expectations

Shallow Wells Show Varied Manganese Levels

USGS samples from wells 10 to 87 feet deep found manganese in all tested locations. These results come from six wells sampled between late June and mid-July 2017. The data indicates manganese appears consistently across well depths in this aquifer.

Groundwater Aquifer is the Source

Since these measurements are specific to aquifer 327KNWH, surface water influences are minimal here. Manganese levels relate to local geologic and soil conditions affecting this groundwater source.

Fixtures and Appliances Affected First

Visible Stains Appear at Faucets and Sinks

Manganese can cause dark brown or black staining on porcelain and fixtures where water is used frequently, such as kitchen and bathroom sinks.

Appliances Using Water May Experience Build-Up

Dishwashers and washing machines may develop spots or deposits inside mechanisms over time from manganese presence, impacting cleaning effectiveness.

Water Quality Changes After Treatment

Fleck Black Manganese Stains Filter Removes Stains and Deposits

Using the Fleck System designed for manganese, water clarity improves at the tap, and staining on fixtures typically stops appearing. The filter targets manganese compounds specifically to reduce visible effects.

Treated Water Maintains Normal Taste and Appearance

Because manganese at regional levels does not usually affect taste or odor, properly filtered water remains pleasant for drinking and cooking.

Understanding 'Detected,' 'Median,' and 'Range' in Local Sampling

'Detected' Means Manganese Was Measured, Not That It Is Unsafe

All six samples from Logan County's aquifer 327KNWH showed manganese present, but none exceeded any federal health threshold.

The Median Concentration Shows Typical Levels

The median manganese concentration in these samples was 44.0 micrograms per liter, a middle-ground value representing the area's common manganese presence.

Range Indicates Variability Across Wells

The lowest concentration recorded was 1.52 micrograms per liter, the highest 273.0 micrograms per liter, showing a wide span of manganese levels among different wells.

Distinguishing Manganese from Other Common Water Elements

Manganese Stains Differ from Iron Stains in Color and Behavior

Manganese stains tend to be darker black or very dark brown, whereas iron stains typically appear reddish-brown, helping to identify the mineral responsible.

Manganese Does Not Cause Rusty Water Like Iron Can

Unlike iron, manganese does not usually tint water red or orange but can cause black specks or particles to appear.

Additional Considerations for Commercial or Industrial Operators

Volume and Flow Rates Affect Treatment Choices

Larger scale water use requires custom sizing of manganese treatment systems beyond household capabilities.

Process Water Quality Standards May Be Stricter

Commercial operations may need lower manganese levels to protect equipment or meet regulatory guidelines, differing from residential needs.

This checklist is based on USGS groundwater data collected from multiple wells in Logan County's aquifer 327KNWH in mid-2017. Visit the USGS website at waterdata.usgs.gov for full details on sampling and water quality records.

Where this information comes from

Source: USGS groundwater sampling. Sampled 2017-07-19. 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 327KNWH aquifer (Logan County): 6 results from 6 wells, median 44.0 ug/L, range 1.52-273.0 ug/L; none above any federal threshold