- Precipitation: Rain, snow, sleet, hail - Surface Water: Rivers, lakes, ponds, oceans - Groundwater: Water stored in aquifers beneath the Earth's surface
Man-made Sources:
- Dams and Reservoirs: Collect and store surface water - Desalination Plants: Convert saltwater into freshwater - Aquifer Recharge: Injecting water into aquifers to replenish groundwater supplies - Rainwater Harvesting: Collecting and storing rainwater for later use - Greywater Recycling: Reusing water from sinks, baths, and showers for non-drinking purposes - Industrial Wastewater Treatment: Treating industrial wastewater to make it suitable for reuse or discharge