In Hong Kong, 80% of homes flush with seawater [0]. It's provided for free by the government to encourage people to connect to that supply rather than the drink

In Hong Kong, 80% of homes flush with seawater [0]. It's provided for free by the government to encourage people to connect to that supply rather than the drinking water supply. I'm sure this can be done elsewhere. [0]: https://www.wsd.gov.hk/en/core-businesses/water-resources/seawater-for-flushing/index.html https://www.wsd.gov.hk/en/core-businesses/water-resources/se...