It is best not to live near polluted water bodies. The water body full of water hyacinth and algae shows that the water body has been seriously polluted. Such water will release too many harmful gases, and even give off a bad smell, which will not only affect health, but also affect beauty, which is also unfavorable to wealth. Because individuals cannot change the pollution of public water bodies, it is best to move away from the polluted water sources. The pollution of some water bodies is invisible, so it is necessary to investigate whether there is a pollution source in the upper reaches of the water bodies.