With huge problems in keeping Marinas clean, Eco Tank has come up with a viable solution for fighting against water pollution.
Their solution- instead of boats dumping waste, hassling with going to pumping stations, they bring the pump to the boat.
Personally speaking, this is great- living by harbors and loving to swim, I will definitely be pushing local marinas to look into this option- you know all that waste floats!
Future Provision of water is also depends on the safety of our water resources. Which are in danger due to pollution caused by industries and other sources. I think you should consider recycling of Industrial water. There many Industrial water treatment consultant including JNB who are providing great services.