Distinguishing Area Records from Your Private Well Results
Government samples reflect a limited number of wells, not your specific source
Darke County’s aquifer 112OTSH was sampled three times between 2011 and 2020 from two wells 19 to 24 feet deep. These samples provide a regional snapshot and do not measure your household water directly.
Sampling data does not determine your private well’s arsenic levels
Concentrations found nearby give context but cannot substitute for testing your own well to identify arsenic presence or concentration.
Preparing Information Before Seeking Treatment Advice
Record your household well depth and type
Knowing your well’s depth helps compare it with the sampled wells from the area, since depth influences arsenic presence.
Obtain your own water test results for arsenic
Only a certified laboratory test on your water can confirm arsenic levels specific to your home.
Note any existing water quality concerns or changes you observe
Details about taste, staining, or plumbing issues can be relevant when discussing treatment options.
Understanding Sample Size and Area-Wide Data Limitations
Three samples from two wells form the arsenic data set
The data’s small size limits how broadly it applies; it documents detections but cannot capture full area variability.
Median arsenic concentration is 25.1 micrograms per liter
This midpoint indicates typical levels found in sampled wells but does not set a health-based threshold or imply your well’s value.
All measurements were below federal arsenic limits
No sampled value exceeded federal safety levels, emphasizing that detections alone do not mean unsafe water.
Interpreting Median and Range for Your Household Context
Range of arsenic detected spanned 1.1 to 26.6 micrograms per liter
Your well’s arsenic could plausibly fall anywhere within or outside that range.
The median indicates half the samples were above and half below 25.1 micrograms per liter
This helps anticipate typical detection but not individual results.
Potential Consequences of Untreated Arsenic Presence
Long-term exposure to arsenic above safe levels may affect health
While area data shows no exceedances, testing your water confirms whether treatment is prudent to reduce any risk.
Arsenic can be present without visible changes to water appearance or smell
Its presence is often undetectable without testing, underscoring the need for laboratory analysis.
Additional Considerations for Commercial or Industrial Water Users
Operators may require more comprehensive water quality profiles
Larger water usage or regulatory compliance needs may call for additional sampling and treatment planning.
System capacity and flow rates become important factors
Industrial settings often need equipment matched to specific volume and contaminant load conditions.
Next Steps for Homeowners Concerned About Arsenic
After testing your private well water, consider a treatment option verified to reduce arsenic effectively. The Autotrol Arsenic Filter ships ready to configure and can address arsenic at levels consistent with those measured in Darke County’s aquifer. Reference your test results to ensure the system meets your household demand and water quality needs.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2020-07-30. 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 Arsenic in the 112OTSH aquifer (Darke County): 3 results from 2 wells, median 25.1 ug/L, range 1.1-26.6 ug/L; none above any federal threshold
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