The sixth Sustainable Development Goal of the United Nations calls for increased water use efficiency, improved water quality, wastewater treatment and reuse, and integrated water resource management systems to ensure water sustainability. This research explores sustainable water management techniques that can be adopted in Al Qarayen1, an urban community in Sharjah, United Arab Emirates, by integrating rainwater harvesting and greywater reuse systems to reduce dependency on desalination. Using a population-based calculation method, the study projects future water demand and proposes a water management model that reuses greywater collected from rainwater to meet water demands. Results indicate that implementing these strategies could lead to a 49.2% decrease in irrigation water requirements and a 26.7% reduction in domestic water demand from the Sharjah Electricity and Water Authority (SEWA). The study emphasizes the importance of routine monitoring and adherence to water quality standards also to ensure water sustainability in the study area.