I was in the industry for a decent amount of years. I know the operators of the water plants around me. I never hesitate to drink the tap water in my area. At home it goes through the filter in my fridge, which manages the runoff taste in the spring, and keeps the water cold.
Might be this dude; it is not free, just very affordable in their market. It turns out making it affordable also brings in a lot of revenue.
https://youtu.be/44Do5x5abRY