Tap water - used wastewater - sewers - drains - sewage treatment stations -discharged into the natural river,
In this process, the sewage treatment station assumes a very key role, all the city's sewage has to be purified here to be discharged, which exists in the consumption of a lot of manpower, electricity and financial resources, every year, the state for the treatment of sewage to spend a large sum of money, but also like this treated Water is not equal to the absolute clean water, there is still a certain amount of pollution of the environment, if you want to secondary use, but also have to carry out decontamination deodorization treatment, the cost is higher. If we do not save water, first of all, the cost of sewage treatment is higher, and secondly, the downstream water quality caused by pollution.
No matter whether it is a big city or a small city, or a rural area, if you don't pay attention to this, it will affect the water quality of the whole country, and the global water quality.
So it's important to conserve as much water as possible.