Tap water or bottled water?

Hello, everyone! Recently, I’ve been experimenting with this new program (it’s nothing weird, just eating certain natural foods). I’ve decided to cut back on the sugar-y sodas and juices and simply go with water. The thing is, it HAS to purified/filtered water.

I do not have a water filter (yet) since money is so tight. So I ask you all: Which would be better for the time being-tap water or bottled water?

I do not know how contaminated the tap water is in my state (TN), but I’ve found it to be ok. I’m really iffy about drinking bottled water because the plastic can be very harmful, and I can taste the difference (which doesn’t taste like pure water). More importantly, the program won’t do me any good if the chemicals in the plastic enter my body (since I must stay away from pesticides,plastics,etc.).

So, to all you nutrition experts, what’d be better until I get my filter: Tap or bottled? Thanks in advance! :)