What does the term "water recycling" refer to in potable water supply?

The term "water recycling" in the context of potable water supply specifically refers to the process of treating wastewater so that it can be reused as drinking water. This process involves various treatment stages that remove contaminants and ensure that the water is safe to meet health and safety standards necessary for potable use.

In many communities, water recycling is a crucial part of sustainable water management, especially in areas facing water scarcity. By treating and purifying wastewater, municipalities can increase their water supply without drawing more from natural sources. This reclaimed water can then be integrated into the potable water supply system, contributing to the overall resilience and sustainability of water resources.

The other options refer to different concepts related to water but do not accurately describe water recycling. For example, collecting rainwater for drinking is a method of water conservation but does not involve the treatment of wastewater. Similarly, the natural cycling of water in ecosystems is a fundamental process in nature but does not pertain specifically to the treatment or recycling of water for human use. Lastly, the reuse of bottled water relates to waste minimization but is not an established method of treating or recycling water.