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As an easterner, I wouldn't say that the water quality in the east is the best. At least there are many chemical enterprises in the air, and the water quality is definitely much worse than that in the west without chemical enterprises. Or judging from the smog, the air in the west is very fresh and the smog in the east is serious. Water pollution includes pesticide and fertilizer pollution, air pollution and groundwater pollution. Therefore, we must protect the quality of surface water and air to ensure a good water source. Then this place is at the source of the Yangtze River in China-Sanjiangyuan.
Sanjiangyuan is located in Qinghai Province, which means that the water quality of Sanjiangyuan in Qinghai Province is the best. Isn't it good to have the best protected natural park in the country and a water source in an uninhabited area?
Sanjiangyuan is the birthplace of the three major rivers in China. There is no chemical industry or so-called modern agriculture in this place, but it is virgin forests and mountains. The largest forest park in China, so the water here is the best and the air is fresh. But this topic is not about mineral water, so it only talks about water quality, so it can only be said that the water quality in Sanjiangyuan is the best, that is, the water in the upper reaches of the Yangtze River is the best. Because the Yangtze River is pregnant with many people's drinking water problems, and there is also the third line of South-to-North Water Transfer Project. Everybody right?
The areas with excellent surface water quality in China are mainly distributed in the Qinghai-Tibet Plateau and its surrounding areas. Most of these areas are no man's land, with good vegetation coverage and no industrial pollution. Fortunately, as the source of the Three Rivers, the water quality in Qinghai Province is very good, otherwise the water quality in the lower reaches of the Yangtze River, Yellow River and Lancang River will be even worse. However, after the study, it will be found that these areas with excellent water quality basically belong to mountainous areas or sparsely populated areas, and human beings have little impact on the environment. On the contrary, the water quality in economically developed and densely populated areas is relatively poor. In some places, the economy has not developed and the environment has been destroyed, which is really not worth the candle.