Well, it has only few negatives but also serious and important positives.
1) Negative: Jonas is not allowed to discuss his assignment nor his training with his friends, family, and everyone else.
2) Positive: The Giver and the Receiver (Jonas) is the only ones who can understand. They have the privilege to see beyond with the memories which show emotion, colors, music, places, and weather changes. That don't exist in their community because of sameness.
How much water do i waste? Well it's quite easy, we leave the sink on when we are brushing out teeth and whenever we was dishes we never turn off the water.