Generally, mechanical filtration requires no electricity and it requires about a minimum of 30 psi water pressure. A high-grade mechanical filter is sufficient to remove most impurities that people are concerned with today. Chlorine, lead, cysts, VOCs, THMs and all kinds carcinogens and industrial pollutants. Generally, mechanical filtration is not a good choice for the reduction of Fluoride, Nitrates, Sodium or hardness minerals. For these problems Distillation or Reverse Osmosis is recommended.
Distillation is a process of filtration by which water is boiled.
The water is caused to evaporate. The evaporation is then trapped and cooled. Distilled water is basically condensation. Because the water is boiled and then cooled, the water seems to taste somewhat flat. Keep in mind that distillers require maintenance, much like a coffee maker or humidifier.