The EWG has a tap water database [0] that I used to get a rough estimate of my tap water quality. Since it was above their recommended levels in several chlorine-containing chemicals and a few radioactive elements, I decided to get an under-sink Aquasana water filter (I’d have gotten while home if I didn’t rent). The one I got is certified for pretty much every known harmful substance, at the highest certified level, as far as I am aware. I haven’t gone full mistrust and tested my water after the fact to ensure it works as advertised, but the water tastes noticeably different and I have personally noticed changes in my energy levels since adding the filter. There are too many unhealthy compounds that are not monitored for, or are under-monitored for, to justify skipping out on water filtration IMO.

[0]: https://www.ewg.org/tapwater/