Which of the following can negatively impact water quality in distribution systems?

The presence of biofilms and sediments in water distribution systems can significantly deteriorate water quality. Biofilms are layers of microorganisms that can form on the inner surfaces of pipes. These microorganisms can produce harmful substances, including pathogens and metabolic by-products, which can contaminate the drinking water supply. Sediments can also harbor contaminants, and their accumulation in pipelines can lead to corrosion and reduced water flow, further impacting water quality. Managing these formations is crucial because they can lead to waterborne diseases and other public health issues.

In contrast, consistency in temperature typically helps in maintaining water quality, as it can prevent conditions that promote bacterial growth. Regular maintenance checks are essential practices that contribute positively, ensuring that any issues with biofilms and sediments are identified and addressed promptly. Similarly, the use of advanced filtration technology is designed to improve water quality by removing impurities and contaminants before they enter the distribution system.