Scientists created a mobile desalination unit that can convert salt water into drinking water without filters – MIT, USA

Rather than filtering water, the ICP method uses an electrical field to apply to membranes above and below a water channel.

Negatively and positively charged particles, like viruses, salt molecules, and bacteria, are repelled by the membranes as they pass by. The charged particles are channeled into an additional stream of water, which is released later.