I must chime in here, as a distributor of Multi Pure water filters.
They make a "point of use" unit which connects under the counter and
has its own faucet. The filter uses a solid carbon block to remove impurities, contaminants and even chlorine. I drink water right out of the stream and have used the Multi Pure for many years to safely remove giardia, e-coli, and other nasty stuff from my drinking water.
There is also a counter-top model which attaches to the faucet, but I find these quite cumbersome. It is also dangerous to accidentally flow hot water thru these types as the toxins may dissolve back into hot water.
It is so convenient to draw a glass (or coffee pot, or jug...)of water right from the "tap". (without having to pour water into pitchers, or lift huge bottles, or wait for it to trickle thru devices)
I can provide more information if anyone is interested...
Some of my customers get these filters to improve the taste of the
water in a town that uses a high amount of chlorine. They also have tubes that go to the ice maker of your freezer for pure ice.
I welcome P.M. or e-mail to veraloe at gotsky.com (replace at with @)