What a Certified Laboratory Test for pH Reports and How to Read It
Laboratory tests for corrosive water commonly measure the pH level, which indicates how acidic or basic the water is. For Shelby County's aquifer 112TRRC, 112 samples collected between 2011 and 2019 showed pH values ranging from 5.0 to 7.5 standard units. A median pH of 6.2 means that half the samples had values lower than this and half had higher. Each test result specifies the pH of the sample tested—not the entire aquifer—and reflects readings from wells 34 to 93 feet deep. These figures help identify the water’s potential corrosivity but do not specify whether any individual household’s water is corrosive without direct testing of their own supply.
How the Treated Water Differs at the Tap Once the Documented Technology Is in Place
The C-Series Corrosive Water Damaging Pipes Filter is designed to condition water that could damage household plumbing due to acidity. When configured, this system adjusts water characteristics to reduce corrosivity and protect metal pipes by stabilizing pH and reducing the water’s aggressiveness toward plumbing materials. Treated water from such a system will typically be less acidic and less likely to cause leaks, pinholes, or premature pipe wear, promoting system longevity and improving water quality at the tap.
What ‘Detected,’ ‘Median,’ and ‘Range’ Mean in the Sampling Record on This Page
In the government sampling of Shelby County groundwater, 'detected' indicates the presence of a constituent—in this case, pH was recorded for every sample. The 'median' represents the middle value when all measurements are ordered from lowest to highest, showing a typical reading, here 6.2 pH units. The 'range' describes the span between the lowest and highest detected values, covering 5.0 to 7.5 pH units. These terms describe the variation observed in the area samples; they do not establish conditions for any single well or residence.
Why Aesthetic Secondary Standards Differ from Health-Based Limits, Applied to pH
The EPA’s secondary standard for pH in water is 6.5 to 8.5 standard units, established mainly for aesthetic and corrosivity reasons rather than health. When pH dips below 6.5, as seen in 68 of the 112 samples from Shelby County’s aquifer, water is considered acidic and can be more corrosive to plumbing. This standard does not indicate that water below 6.5 is unsafe, only that it may cause staining, metal leaching, or pipe damage. Health-based standards relate to substances that directly affect safety, which differs fundamentally from pH’s role in water quality management.
What Distinguishes This Problem from the Two Problems Most Often Confused with It
Corrosive water is distinct from hardness and microbial contamination, though they may coexist. Unlike hard water, which deposits minerals and causes scale buildup, corrosive water primarily damages pipes by dissolving metal components. Unlike microbial issues, corrosivity is a chemical condition and does not indicate bacterial presence or health risk directly. Understanding these differences helps households choose an appropriate treatment system tailored to corrosion rather than scale or disinfection.
Deciding on the right treatment for corrosive water involves testing your own water to confirm its pH and corrosivity profile. Using area data from Shelby County’s aquifer 112TRRC offers helpful context but cannot substitute for specific testing. The C-Series Corrosive Water Damaging Pipes Filter ships ready to configure and provides a documented approach to managing corrosive water’s effects on household plumbing.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2019-06-11. 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 112TRRC aquifer (Shelby County): 112 results from 24 wells, median 6.2 standard units, range 5.0-7.5 standard units; EPA secondary standard for pH is 6.5-8.5 (aesthetic/corrosivity, not health-based); 68 of 112 sampled results fell below 6.5