This WATER Tunnel In Singapore's Is CRAZY!

The national water agency of Singapore, PUB, came up with the idea for the Deep Tunnel Sewerage System (DTSS) more than 20 years ago. It is a motorway for spent water that is vital to a small city-state with a growing urban population.
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In order to meet Singapore's long-term demands for used water collection, treatment, reclamation, and disposal, it captures water from residential blocks, commercial premises, and industrial estates and recycles it.
With a network of tunnels, pipelines, water reclamation facilities, and ocean outfalls, Singapore's Deep Tunnel Sewerage System (DTSS) would entirely replace the sewerage infrastructure of the tiny island nation.

[@mhmdnazel1]

Many water plants and soil/clay can naturally cleanup sewage and disinfect the water.. It has been so for millions of years.. just like the sump tank in an aquarium.... in addition to the DTSS

[@apakansaja8505]

*Malaysia has much to learn from Singapore. Shud build tunnel and large water reservoir underground during rainy season to store water and flood prevention and to utilise the same when facing yearly occurrence of drought season.*

[@perryrivera9033]

PUB’s deep tunnel sewerage system is an impressive feat of engineering and long-term water infrastructure which other countries should copy. Kudos to PUB team! I also chanced upon a similar engineering marvel in the city of Chicago where a deep tunnel was constructed to reclaim and treat wastewater as well as reverse the flow river which used to pollute the great lakes. Guess when was the project?… it was completed in 1920, 100y ago! Kudos to the Americans for their grand design and superb engineering skillset.