London's Victorian sewers were designed to serve 4 million people.
![](/media/3301/vic-1.jpg?anchor=center&mode=crop&width=540&height=290&rnd=132052385630000000)
Now nearly 9 million people send a stinking amount of poo through London's sewers daily.
![](/media/3302/vic-2.jpg?anchor=center&mode=crop&width=540&height=290&rnd=132052385630000000)
Did you know, London's population is estimated to increase to 16 million by 2160?
2m
![person](/dist/images/person.png)
![person](/dist/images/person.png)
1860
4m
![person](/dist/images/person.png)
![person](/dist/images/person.png)
![person](/dist/images/person.png)
![person](/dist/images/person.png)
1920
8.8m
![person](/dist/images/person.png)
![person](/dist/images/person.png)
![person](/dist/images/person.png)
![person](/dist/images/person.png)
![person](/dist/images/person.png)
![person](/dist/images/person.png)
![person](/dist/images/person.png)
![person](/dist/images/person.png)
2019
16m
![person](/dist/images/person.png)
![person](/dist/images/person.png)
![person](/dist/images/person.png)
![person](/dist/images/person.png)
![person](/dist/images/person.png)
![person](/dist/images/person.png)
![person](/dist/images/person.png)
![person](/dist/images/person.png)
![person](/dist/images/person.png)
![person](/dist/images/person.png)
![person](/dist/images/person.png)
![person](/dist/images/person.png)
![person](/dist/images/person.png)
![person](/dist/images/person.png)
![person](/dist/images/person.png)
![person](/dist/images/person.png)
2160
1860
1920
2019
2160
These sewers overflow into the River Thames when it rains.
![](/media/3299/tw-5.jpg?anchor=center&mode=crop&width=540&height=290&rnd=132052385630000000)
Sewage is the last significant source of pollution in the river.
![](/media/3300/tw-6.jpg?anchor=center&mode=crop&width=540&height=290&rnd=132052385630000000)
The Super Sewer is the solution to tackle these problems.
25km long and 7.2 metres in diameter, it will be completed in 2025.
![](/media/3297/tw-3.jpg?anchor=center&mode=crop&width=540&height=290&rnd=132723840180000000)
The Thames Tideway Tunnel will protect the river for at least the next 100 years.
![](/media/3298/tw-4.jpg?anchor=center&mode=crop&width=540&height=290&rnd=132052385620000000)