The recommended daily water intake for adults generally ranges between 2 to 3 liters, depending on factors like activity level and climate. This equates to about 8 to 12 cups of water a day. Hydration is vital for numerous bodily functions, including temperature regulation, nutrient transport, and waste elimination. Staying adequately hydrated improves physical performance, enhances focus, and supports overall health. Increased physical activity can elevate hydration needs, making it essential for active individuals to drink more water. Monitoring thirst and the color of urine can help maintain proper hydration levels.