This won't directly tell you if your pipes are bad (and Atlanta does have some areas that used lead pipes from the county supply to the home) but it's a pretty good indicator of the water quality in my area.
If you're really concerned, it's almost always a better investment to get your tap water tested and fix the pipes than it is to buy bottled.
Hell, in my county this information is easily available online and in libraries and is broken down by measurements in the processing plant vs measurements in the distribution network. http://www.fultoncountyga.gov/images/stories/WR2/2017/CCR_20...
This won't directly tell you if your pipes are bad (and Atlanta does have some areas that used lead pipes from the county supply to the home) but it's a pretty good indicator of the water quality in my area.
If you're really concerned, it's almost always a better investment to get your tap water tested and fix the pipes than it is to buy bottled.