What should be the desired performance of a modern water purifier?

The need of the hour is to have a purification technology which effectively removes harmful dissolved impurities such as Pesticides, Rust, Heavy Metals, Arsenic, Fluoride, etc apart from other impurities like bacteria and viruses. At the same time, the purifier should retain essential natural minerals in drinking water. It should also work efficiently over a long period of time.

Thankfully, such a purification technology is available today!