Where do feaces go?

Feaces, in other words poo, goes directly to the sea, it is horribly disgusting. It goes down the toilet to the sea by a drenage pipe that goes all over the city(it is underground) and because poo is made of bacteria(bad) and undigested food, it kills sea life, sometimes these are near beaches, so imagine yourself havind fun in the sea without knowing you are ontop of feaces. We have to stop this.