What Government Sampling Reveals About pH in St. Clair County Aquifer 112SDGV
Groundwater samples taken from wells in St. Clair County's aquifer 112SDGV show a median pH of 7.8 standard units, with values ranging narrowly from 7.7 to 8.1. These results, gathered from three samples over six years between 2016 and 2022, indicate water that is neither acidic nor below the Environmental Protection Agency's (EPA) secondary aesthetic pH standard of 6.5 to 8.5. It is important to note that these findings reflect the water in sampled wells 127 feet deep, not any individual household well.
Seasonal and Multi-Year Variation Observed in pH Records
The USGS data spans multiple years, showing consistent pH values in a narrow range without falling below the lower EPA aesthetic standard. This stability suggests little seasonal or multi-year fluctuation in the pH of groundwater from this specific aquifer within the sampling timeframe. Homeowners considering water treatment should still verify their own water's conditions as local variations outside the sample locations may occur.
Potential Effects of Untreated Acidic Water Over Time
When water exhibits acidity (pH below 6.5), it can gradually increase corrosion in household plumbing systems, leading to staining, metallic tastes, or damage to pipes and fixtures. Since the sampled pH levels in this area do not fall below this threshold, these issues may not be common here, but testing individual water is essential to confirm localized acidity.
Influence of Well and Sample Depth on pH Expectations
The sampled wells are moderately deep at approximately 127 feet. Groundwater pH can vary with depth, so shallower or deeper household wells might have different pH profiles. Understanding your well’s depth and water source type helps set expectations for potential acidity and informs treatment decisions.
Changes in Water Characteristics After Treatment with the C-Series Acidic / Low-pH Water Filter
When acidic or low-pH water is present, the C-Series Acidic / Low-pH Water Filter adjusts the water’s pH closer to neutral levels before it reaches taps. This treatment reduces potential corrosivity and the likelihood of negative effects associated with acidic water without introducing other additives. The system ships ready to configure for household use, providing a practical method to address low-pH water where it exists.
Distinguishing Aesthetic Secondary Standards from Health-Based Limits for pH
The EPA’s secondary standard for pH, ranging from 6.5 to 8.5, focuses on aesthetic aspects like taste and plumbing impacts rather than direct health concerns. None of the sampled groundwater pH values in St. Clair County aquifer 112SDGV fall below this range. This distinction clarifies that acidic water presence is a concern for home maintenance and comfort, not necessarily a health risk.
Distinguishing Acidic Water from Frequently Confused Household Water Conditions
Acidic water (low pH) differs from hard water, which involves mineral content like calcium and magnesium, and from colored or cloudy water, which relates to sediments or organic matter. Recognizing this difference helps households explore targeted solutions like pH adjustment rather than unrelated treatments.
In summary, St. Clair County’s groundwater sampling shows pH values within the EPA’s aesthetic range, indicating that acidic water is not broadly detected in the area. Homeowners should test their own water to determine if low pH is a local issue and consider using the C-Series Acidic / Low-pH Water Filter to correct acidity if needed.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2022-10-20. 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 112SDGV aquifer (St. Clair County): 3 results from 1 wells, median 7.8 standard units, range 7.7-8.1 standard units; EPA secondary standard for pH is 6.5-8.5 (aesthetic/corrosivity, not health-based); 0 of 3 sampled results fell below 6.5