This chapter presents the ecosystem approach to manage the quality of water and therefore preserve and protect the ecosystem for the benefit of society. It presents different sources of wastewater as the potential alternative as a water source. It gives an outline regarding the effects of wastewater on the environment and the means of treating wastewater using gas hydrate technology. Seawater desalination, wastewater treatment, and heavy metal processing are all part of the proposed hydrate-based technology, which can be applied to widespread applications. Gas hydrate technology is a good way to mitigate the heavy metal concentrations in wastewater. © 2022 John Wiley & Sons, Inc.