[image credit: Chemical & Engineering News]
Why flush our toilets with drinking water?
Cities around the world are purifying water to a drinkable state, only for it to be flushed down toilets. Not only could this waste of water and other resources be better used elsewhere, but the resulting runoff tampers with the salinity of nearby marine ecosystems.
Solution: Use more plentiful saltwater sources for toilet flushing
A separate saltwater distribution system was built for Hong Kong in the 1950's, and it is used to this day to provide water for toilets and other "grey water" uses. In addition to conserving Hong Kong's limited freshwater reserves, the treated saltwater is less harmful to the local marine ecology when it is introduced back into the harbor.
- Chemical & Engineering News | Flushing Toilets With Seawater Could Protect Marine Life