Government records from the U.S. Geological Survey report manganese concentrations found across Washington County aquifer wells, based on 129 samples collected from 16 wells between March 2010 and April 2025.
Sample Size, Wells, and Data Limitations
The manganese data set consists of 129 measurements drawn from 16 distinct wells that range in depth from 75 to 1000 feet. While this provides a good regional snapshot, it is not a substitute for testing your specific household water source. Variability in manganese levels can occur within and between wells, so personal testing is necessary to know your water’s exact condition.
How Well Depth and Source Affect Manganese Presence
These wells tap into the aquifer at varying depths, which influences manganese presence and concentration. Deeper wells may encounter different mineral layers than shallow ones, potentially affecting manganese levels detected in samples. Knowing the depth and source type of your water can help interpret test results in context.
Certified Laboratory Testing Explained
To establish manganese levels in your water, a certified laboratory analysis is required. Such tests report manganese concentration in micrograms per liter (ug/L). Reading these results involves comparing values against known regional data and understanding that detection alone does not imply any violation or unsafe condition.
Interpreting Manganese Measurements and Federal Standards
The recorded manganese range in this area spans from 0.19 to 2480.0 ug/L, with a median of 0.84 ug/L. Notably, none of these samples exceeded federal health-based thresholds for manganese. This means that while manganese is detected, it is within regulatory limits and should not be interpreted as a health hazard by itself.
Signs That Suggest Manganese Issues in Household Water
Manganese can cause staining on fixtures, clothes, and appliances and may affect taste or odor at higher concentrations. However, these aesthetic effects do not necessarily indicate a health risk. If you observe such symptoms in your home water, verifying manganese concentration through lab testing can clarify whether manganese is the cause.
Comparing Washington County with Neighboring Areas
Nearby regions may have different manganese profiles. When comparing data, it is crucial not to assume that your water shares the same characteristics as the broader area's data or nearby counties’ records. Each aquifer and well is unique, so regional data should inform but not determine your water quality assumptions.
In summary, regional manganese data from Washington County’s aquifer reflects a range of concentrations with no federal health limit exceedances in the sampled wells. Testing your own water using a certified laboratory is the only way to confirm your individual manganese level and its possible impact. For those needing to manage manganese staining, the C-Series Black Manganese Stains Filter system ships ready to configure and addresses manganese-related staining effectively.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2025-04-23. 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 aquifer (Washington County): 129 results from 16 wells, median 0.84 ug/L, range 0.19-2480.0 ug/L; none above any federal threshold