How Sample Depth, Well Depth or Source Type Changes What a Reader Should Expect
Samples in this area reflect wells 20 to 66 feet deep
Government sampling in Bristol County’s aquifer 112SRFD includes 14 results from 7 wells ranging between 20 and 66 feet in depth. This depth corresponds to water typically drawn from shallow to moderately deep aquifers. The manganese levels recorded represent what was measured at these depths, not your specific well.
Source type affects manganese presence
Groundwater drawn from aquifers like 112SRFD may naturally contain manganese, but the concentration varies with local geology and water chemistry. Municipal sources or surface water may show different profiles and are not represented in this data set.
What 'Detected', 'Median' and 'Range' Mean in the Sampling Record on This Page
Manganese was detected in all samples
All 14 samples collected from the 7 wells detected manganese, indicating it is commonly present in this area’s groundwater. Detection means instruments found measurable manganese; it is not a safety violation or a guarantee of water quality issues.
The median manganese level was 70.8 micrograms per liter (µg/L)
This median value shows the middle concentration among the samples, meaning half were above and half below this number. It provides a useful central estimate but does not predict your own water precisely.
Range varied from 1.44 µg/L to 339.0 µg/L
The range shows the lowest and highest manganese measurements recorded among the samples. A wide range suggests variability in groundwater manganese depending on exact location and well depth.
How to Compare This Area's Record With a Neighboring County's Without Overreading It
Sampling conditions and data collection periods should be considered
When comparing manganese data from Bristol County to nearby counties, note that differences in sampling dates, well depths, and aquifer characteristics can affect results. Differences do not necessarily indicate worse or better water quality.
Variability is normal across regions
Neighboring counties may have higher or lower median or maximum manganese levels, but these differences reflect natural geological variation rather than individual household conditions.
How Many Samples and Wells Stand Behind the Figures, and What a Small Sample Means
Sample size consists of 14 results from 7 wells over several years
The manganese data comes from a relatively small number of samples and wells collected between 2010 and 2019. This limited sample size offers an indicative but not exhaustive view of manganese presence in this aquifer.
A small sample set requires cautious interpretation
With only 7 wells represented, data may not capture all variations within the aquifer. Individual well conditions can differ significantly from the area median or range.
What a Certified Laboratory Test for This Constituent Reports and How to Read It
Testing measures manganese concentration in micrograms per liter (µg/L)
A certified lab test on your household water will report manganese concentration in units matching government samples. This enables direct comparison to regional figures but always reflects only your specific water source.
Lab results indicate presence, not safety breaches
Detected manganese does not mean your water is unsafe. No federal health-based thresholds were exceeded in the local sampling. However, manganese above certain levels can cause staining or taste concerns, which a test can help confirm.
After measuring manganese concentration in your household water, consider the C-Series Black Manganese Stains Filter. This equipment ships ready to configure and is documented to effectively address manganese in residential settings like yours, helping restore water quality after equipment failure.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2019-09-18. 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 112SRFD aquifer (Bristol County): 14 results from 7 wells, median 70.8 ug/L, range 1.44-339.0 ug/L; none above any federal threshold