Typically the waste brine is pumped back out to sea. Its spread over a wide(ish) area to attempt to minimize the environmental impact. There are varying opini

Typically the waste brine is pumped back out to sea. Its spread over a wide(ish) area to attempt to minimize the environmental impact. There are varying opinions about whether enough is done to avoid damaging the environment. https://en.wikipedia.org/wiki/Desalination#Environmental https://en.wikipedia.org/wiki/Desalination#Environmental