What is an on-site non-potable water reuse system?

An on-site non-potable water reuse system involves the collection, treatment, and use of water that is generated and treated on the premises. This system is designed to recycle wastewater for purposes that do not require drinking water quality, such as irrigation, toilet flushing, or industrial processes. This approach not only conserves water but also reduces the demand on municipal water systems.

In contrast, the other choices do not accurately define what an on-site non-potable water reuse system entails. For instance, disposing of wastewater does not involve the treatment or reuse of the water, while a public water distribution network is designed for delivering potable water to the public and does not pertain to treatment or reuse of non-potable water on-site. A rainwater harvesting system is a different concept that specifically pertains to the collection and storage of rainwater, rather than the treatment of generated wastewater for reuse. Therefore, choice B represents the correct understanding of an on-site non-potable water reuse system.