The sea water might've turned sweet due to mixing up of large amount of chemicals in the sea water and also due to the garbage,factory wastes that mix up with sea water.I dont think it's some sort of miracle or God's holy water.I had seen a mother making her infant to drink that water just bcause she thought it was a holy water.I'd like the govt. must be a bit more serious about this particular matter as it may harmthe healthof future generation.