. Which is the biggest source of water on earth? Share with your friends Share 0 Priya Singh answered this Oceans are the biggest source of water on earth. It consists of 97 % water resource, which is saline. Rest 3% is fresh water. 0 View Full Answer Yasoswini answered this Oceans 0 Yasoswini answered this Oceans 0 Bilal Bin Faisal Khan answered this Sea 0 Ashik Paul answered this oceans or sea is biggest source of water on earth. 0 Priyanka Sahu answered this Oceans are the biggest source of water on earth 0 Vansh Mehta answered this OCEANS 0 Varshita Kolipaka answered this oceans but the biggest ocean is the pacific ocean 0