Which factor does NOT typically affect the pH of water?

The pH of water is influenced by various factors, including the presence of substances that can donate or accept hydrogen ions. Industrial discharges can introduce pollutants that alter water chemistry, thus affecting pH levels. Natural mineral content also plays a significant role, as different minerals can impact acidity and alkalinity. Rainfall can influence pH, particularly in areas where acid rain occurs, as it adds substances to water bodies.

While water temperature can affect the solubility and chemical reactions occurring in water, it does not directly influence the pH level. The pH level itself is a measure of hydrogen ion concentration, and while temperature can affect reaction rates and the equilibrium of some chemical processes, temperature alone does not change the pH. Thus, it is accurate to say that water temperature is the factor that does not typically affect pH in the same direct manner as the other listed factors.