Filtering water is a bit of a minefield nowadays, but buying a filter can significantly cut down your intake of toxic compounds. You could buy bottled water but that soon adds up: it’s often cheaper in the long run to get an under the sink solution.
If you are thinking of doing that at any point, this new Water Filter Guide from the Environmental Working Group is a really helpful run-down of the pros and cons of each type.
Personally, I have an under the sink Reverse Osmosis with a double carbon filter system for cooking and drinking water, a chlorine whole house filter and a special shower head to minimise water use. Do I feel smug? Yep.
You can see the water filter one I have and recommend here, along with other lifestyle stuff I have found to be excellent over the years.
Great reporting from EWG as usual, do support them if you can.