I worked in a water plant for 5 yrs. , some of u guys a full of it ! They use chemicals in a controlled amount to clean and dis infect the water. Tulsa has had one of the top 5 cleanest water systems in the nation off and on for yrs...
Not on Tulsa water , but I run two filters , my fridge filter doesn't get dirty after 1 1/2 yrs. It cost over $40 to replace, and the warning light comes on every 6 months, glad I cut the last one open, wasn't squat in it !