What issue does dissolved carbon dioxide cause in a water distribution system?

Dissolved carbon dioxide can lead to corrosion in a water distribution system primarily due to its ability to form carbonic acid when it reacts with water. This acid can lower the pH of the water, making it more acidic. In a more acidic environment, metals such as iron, copper, and lead, which may be present in piping materials, are more susceptible to corrosion. As the protective oxides on the metal surfaces are compromised, this can lead to increased leaching of metals into the water supply, potentially affecting water quality and safety.

Additionally, corrosion can cause structural issues within the distribution system, leading to leaks and maintenance problems. Monitoring dissolved carbon dioxide levels can be essential for preventing these harmful effects and ensuring the longevity of water infrastructure.