What is the risk of not maintaining proper chlorine residual in the water distribution system?

Maintaining proper chlorine residual in the water distribution system is crucial for ensuring safe drinking water. Chlorine, as a disinfectant, plays a key role in controlling microbial contaminants that can lead to illnesses. If chlorine residual levels drop too low, there is a heightened risk of bacterial growth, including harmful pathogens such as E. coli or Salmonella.

These bacteria can proliferate in untreated water, creating a serious public health concern, particularly for vulnerable populations. Effective disinfection helps to minimize the risk of waterborne diseases, making it essential to keep chlorine levels within the recommended range throughout the distribution system. This is why the risk of bacterial growth is acknowledged as a significant concern when chlorine residuals are not adequately maintained.