Are there any concerns for customers using drinking water with a pH outside the EPA recommended range of 6.5 to 8.5?
From a health effects standpoint, a wide range of pH values can be tolerated by persons consuming water. However, values outside the range of the secondary standards of 6.5 to 8.5 can cause increased corrosivity. Corrosive water tends to dissolve metals (e.g., lead, copper) with which it comes into contact. Elevated levels of metals such as lead in drinking water are known to cause adverse health effects. Additionally, at high pH values, the ability of chlorine to provide disinfection protection diminishes and the formation of halogens (e.g., trihalomethanes) increases (42 FR 17143; March 31, 1977).
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