Understanding What 'Detected', 'Median' and 'Range' Indicate in Washington County Aquifer Sampling
The U.S. Geological Survey has tested groundwater from 14 wells in Washington County’s 112MRVA aquifer, collecting 26 pH measurements between 2010 and 2020. The median pH recorded is 7.0 standard units, with the full range from 6.4 to 8.4. The term 'detected' means a pH was measurable in each sample, not that a problem exists. Among these samples, two measured below the EPA secondary standard minimum of 6.5, indicating zones where slightly acidic conditions have been noted; this standard relates to potential impacts on taste and plumbing, not health risks. These figures reflect area results, not any individual well’s water profile.
How the Pentair Acidic / Low-pH Water Filter Treats Low pH Water
This system focuses on neutralizing acidic water by balancing pH levels to reduce potential corrosivity and improve water characteristics related to taste and plumbing preservation. Using media designed to increase the pH closer to neutral levels, the system addresses water that falls near or below the lower pH range recorded in the aquifer. The technology conditions the water without altering its fundamental mineral content, preparing it for typical household use. It ships ready to configure and operate as part of a home's water treatment setup.
Consequences of Leaving Acidic Water Untreated Over Time
If low pH water is left untreated in a household setting, it may contribute to accelerated wear on plumbing fixtures and metal pipes, potentially leading to staining or discoloration. Such conditions can affect water taste and cause metal leaching, which may stain laundry or fixtures. However, these effects develop gradually and vary widely depending on individual water chemistry and household plumbing materials. Acidic water is not a health hazard by itself but can compromise infrastructure and aesthetics.
Information to Collect Before Seeking Treatment Recommendations
Before selecting equipment, homeowners should obtain a current water test specific to their household supply, including pH measurement and other parameters of interest. Additionally, it's helpful to note the depth and type of well, as these can influence water chemistry. Understanding household plumbing materials can also guide treatment choice. A clear record of observed water characteristics—such as taste, staining, or pipe corrosion—will assist in selecting an appropriate system.
The Role of Sample and Well Depth in Interpreting pH Variation
The wells sampled ranged from 39 to 120 feet deep, representing typical residential well depths. Variations in pH can occur with depth, as water chemistry may change in different aquifer zones. Deeper wells might show different pH values than shallower ones due to geochemical conditions. Therefore, a homeowner’s water pH might differ from these area figures. Understanding the well’s depth and source helps in anticipating the need and type of treatment.
Washington County’s aquifer 112MRVA pH data comes from 26 samples across 14 wells collected over a decade, reflecting regional groundwater quality trends. For detailed source data, visit the U.S. Geological Survey groundwater monitoring location at https://waterdata.usgs.gov/monitoring-location/331654090501402/.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2020-07-22. 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 pH in the 112MRVA aquifer (Washington County): 26 results from 14 wells, median 7.0 standard units, range 6.4-8.4 standard units; EPA secondary standard for pH is 6.5-8.5 (aesthetic/corrosivity, not health-based); 2 of 26 sampled results fell below 6.5
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