Can someone Help please List the methods you think is used to treat water for contaminants before it gets to your faucet.

the mantle

explanation:

earth is divided into three layers: the crust or the outermost layer on which we live; the underlying, middle layer - the mantle - and the core (the innermost layer of earth).

the answer to this question is 3.

i think is conclusions.i think so

i belive it is water