Manganese Levels in Clay County Water: Understanding Local Aquifer Data and What It Means for Your Home
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What a Median of 297 µg/L and Range up to 1880 µg/L Tell a Clay County Homeowner
Clay County’s groundwater comes primarily from the 111ALVM aquifer, where water is accessed from wells between 36 and 105 feet deep. According to U.S. Geological Survey data collected from nine wells since 2010, manganese was detected in every sample. The median concentration measured was 297 micrograms per liter (µg/L), with values ranging up to 1880 µg/L.
For a household, this means manganese is regularly present in the aquifer water feeding your well. However, these figures represent area-wide conditions, not your specific supply. Your water’s manganese concentration could be higher or lower, and only a current test of your own water can establish your individual level.
How Clay County's Manganese Levels Vary Over Time and Wells Sampled
The recorded manganese concentrations come from samples taken over a 16-year period, from June 2010 to May 2026. Such a time span captures seasonal shifts and longer-term variations in groundwater chemistry. Despite this range in sampling times and well depths, manganese was consistently found, illustrating its pervasive presence in this aquifer.
This variability means the manganese you observe at your tap could fluctuate with seasonal changes or differences in well depth and location. Tracking your water’s manganese over time by periodic testing helps you understand any changes specific to your household.
What 'Detected', 'Median', and 'Range' Mean in the Clay County Manganese Sampling Record
Each of the 50 results from nine wells showed manganese above the reporting limit, so all samples detected manganese. 'Detected' means the measuring instruments recorded manganese, not that the amount is excessive or in violation of any standard.
The median value divides the data so half the samples have manganese below 297 µg/L and half above. The range—from 163 to 1880 µg/L—shows the lowest and highest amounts found in any sampled well during the study period.
Importantly, no manganese level measured exceeded any federal threshold. This means the aquifer’s manganese levels are within the limits set for safety and acceptable water quality, although manganese can affect water color and cause staining.
What Different Household Uses Mean for Interpreting Clay County Manganese Data
Larger households with greater water use will pull more volume from the aquifer, but the manganese concentration in supplied water remains governed by the well’s drawn water, not household size. Likewise, a seasonal home or second property drawing water from the same aquifer will face similar manganese presence but might observe some seasonal variation based on when water is used and sampled.
Knowing your own water’s manganese requires sampling your well water, especially if you notice staining or discoloration. Area data provide context but cannot replace your specific water testing.
How to Consider Clay County Manganese Data When Comparing with Nearby Regions
Manganese levels vary naturally by geology and aquifer characteristics. Comparing Clay County’s manganese record with nearby counties can reveal regional trends, but differences in sampling methods, well depths, and geological formations influence results.
A direct comparison should not be overinterpreted to conclude one county has better or worse water quality without considering these factors. Area data are a guide to what might occur locally, not a definitive statement for any single household or well.
Addressing Residential Manganese in Clay County with Documented Treatment
Once you have measured your water’s manganese and found a level that concerns you, a reliable treatment method is the Pentair Black Manganese Stains Filter. This system ships ready to configure and is documented for reducing manganese’s effects such as staining and discoloration, helping maintain water clarity and appliance longevity for your household.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2026-05-12. 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 111ALVM aquifer (Clay County): 50 results from 9 wells, median 297.0 ug/L, range 163.0-1880.0 ug/L; none above any federal threshold