Most toilets in Hong Kong are flushed with seawater in order to conserves the city’s scarce freshwater resources.

In Hyderabad also recycled water is in use in new colonies.
In newly built apartments & gated communities , drainage water generated in that particular premises is treated with the help of sewage treatment plants. this water is used for toilet flushing & gardening, landscaping purpose. this will reduce the load on the already scarce ground water.