Rainwater harvesting helps reduce water consumption by capturing and storing rainwater that would otherwise be lost as surface runoff, allowing it to be reused for non‑potable applications. Properly designed systems collect rainwater from rooftops, filter it, and store it for uses such as gardening, flushing, cleaning, and groundwater recharge. By supplementing municipal water supply, rainwater harvesting significantly lowers freshwater demand and supports sustainable water usage, especially in water‑stressed urban environments.