What is a key benefit of implementing a robust multiple barrier system in water treatment?

Implementing a robust multiple barrier system in water treatment significantly enhances contaminant removal processes. This approach involves using several treatment steps or barriers, such as physical, chemical, and biological methods, to effectively eliminate or reduce various contaminants present in the water. Each barrier targets different types of pollutants, ensuring that a wide range of contaminants is addressed. For example, one barrier might concentrate on sediment removal, while another may focus on disinfection or chemical removal.

This multilayered strategy not only increases the chances of achieving high water quality but also provides a safeguard against system failures. If one barrier becomes less effective due to unforeseen circumstances, others remain in place to continue protecting water quality. This redundancy is crucial, especially in safeguarding public health and complying with regulatory standards. In contrast, the other options suggest drawbacks or singular approaches that do not align with the principal advantage of a multiple barrier system.