Do you collect rain water?

this is the water I am living from, there is a water cistern built underneath the house. There is a terrace where the water flows from the roof, and through basic filtering it moves to the cistern. Then I use one of those commercial water filters in a kind of jug to filter it before drinking it.

i collect it for my plants.. i wouldn't drink it.. maybe far out somewhere else if i desperately needed water but unlikely