Water is stored in dams and it is transported by canals to somje bigs tanks.
This metoth didn't exist 60 years ago so that's why the Bogota rive is so contaminated.
Talking about the Bogota river there is a plant that takes some bogotas river water and try to clean it by burning some bacterias and then the pñant returne all the water to the bogota river.
60 years ago because the dirty water of the Bogota river there was a disease called IOFERDEA in wich consisted of getting very sick by drinking very dirty water from the river on wich you have to take water to drink.
There are some images about the water service company in wich their pet is a frog:

This is their pet the frog and logo.