Fleck Acidic / Low-pH Water Filter

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This week, you are deciding between two technical water treatment approaches to address concerns about acidic water impacting your home in St. Clair County, Illinois.

Acidic Water Is Not the Same as Hard Water or High Chloride Water

Many confuse acidic water with hard water or water high in chloride, but these issues differ significantly. Acidic water refers to a low pH value, indicating it is more acidic and potentially more corrosive. Hard water relates to minerals like calcium and magnesium, while high chloride affects taste and can cause metal corrosion or staining. Government sampling of St. Clair County's aquifer 110QRNR monitored pH levels—not hardness or chloride—and the distinction is important to selecting the right treatment.

Symptoms That Suggest Acidic Water—and Those That Do Not

Signs often linked to acidic water include metallic taste, corrosion of metal plumbing and fixtures, and blue-green staining on copper pipes or appliances. Conversely, cloudiness or spots in water more commonly relate to other water quality issues. While low pH can contribute to damage, the presence of these symptoms alone does not confirm acidic water without testing.

Understanding the Local pH Record: What Homeowners Should Know

The U.S. Geological Survey collected 16 pH measurements from five wells in St. Clair County within aquifer 110QRNR, ranging from depths of 31 to 60 feet, between 2011 and 2026. The median pH was 7.05 standard units, with a range from 6.7 to 7.6. None of these values fell below the EPA’s secondary standard lower threshold of 6.5, which relates to aesthetics and corrosion potential but is not a health-based limit. This data reflects area-wide conditions and does not represent any individual household source.

Steps to Confirm Your Water's pH and Rule Out Other Factors

• Start with a simple pH test kit for your tap or well water to get a preliminary measure of acidity.
• If results suggest low pH, request a certified laboratory analysis for precise pH and related water chemistry.
• Review plumbing and fixture conditions for signs of corrosion or staining, which may corroborate acidity concerns.
• Eliminate other water quality issues such as hardness or chloride that can also affect taste and fixture wear.

Assessing Treatment Capacity Relative to Household Water Use

Before selecting a water treatment device, consider your household’s average daily water demand. The Fleck Acidic / Low-pH Water Filter is designed to adjust pH levels effectively for residential volumes of water. Ensuring the system can handle your flow rate and consumption patterns will help maintain water quality without undue strain on equipment.

Maintenance Needs for the Fleck Acidic / Low-pH Water Filter

This system ships ready to configure and requires routine attention every few months to maintain optimal function. Regular checks involve replenishing filter media and monitoring performance to ensure pH correction is consistent. These maintenance tasks are straightforward and support long-term water quality improvement.

Choosing between treatment options requires clear understanding of local water conditions, preliminary testing to confirm your home’s pH, and consideration of household water use. The Fleck Acidic / Low-pH Water Filter offers a documented approach to adjust acidity in residential water sources when warranted by testing and symptoms.

Where this information comes from

Source: USGS groundwater sampling. Sampled 2026-07-28. 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 110QRNR aquifer (St. Clair County): 16 results from 5 wells, median 7.05 standard units, range 6.7-7.6 standard units; EPA secondary standard for pH is 6.5-8.5 (aesthetic/corrosivity, not health-based); 0 of 16 sampled results fell below 6.5