what I learned from this presentation

The main thing that I learned from this presentation is that the water we drink every day is very clean we have multiple filter in my house and the water we drink may be cleaner then the water from bottled water it can also keep us healthy by people adding florid. I also found that the water coming out of the water treatment plan is cleaner then the water in the bark rive. I think that drinking water from the tap is very clean and fine to drink.