What factor can cause water to be corrosive?

pH is a crucial factor in determining the corrosiveness of water. Water that is too acidic (with a low pH) can lead to increased corrosion of plumbing systems and fixtures, as it can react with metals and other materials in the system. This reaction can result in the leaching of metals, such as lead and copper, into the water supply, posing health risks to consumers.

Conversely, water with a high pH can also lead to corrosive conditions in a different manner, by precipitating out minerals that can protect pipes and surfaces from deterioration. The ideal pH range for preventing corrosion in water systems is typically between 7.0 and 8.5, as this helps to maintain a balance that minimizes the potential for corrosion while keeping the water safe for consumption. Thus, pH is fundamentally significant when assessing water quality and its potential to cause corrosion.