Ask where the water quality in Beijing is not good.

This is a big problem, because different communities have different water supply methods, and even if they are close, the water quality will be different.

Let's talk about the general distribution of water quality in Beijing:

Beijing water hardness can be roughly divided into five areas.

East: Jianguomen, Shuangjing, Panjiayuan and other areas, the water quality is hard. The hardness is generally 200-280 mg/L;

Southern region: Xuanwu, Fengtai, Daxing and other regions have poor water quality, and the hardness is generally 450-800 mg/L;

West area: Balidian, ganjiakou, Yangfang and other areas have high water hardness, generally 350-450 mg/L;

North area: Asian Games Village, Wangjing, Zuojiazhuang, Anzhen and Heping Street have good water quality, and the hardness is generally120-180 mg/L;

Central area: Muxidi, Fuxingmen, Sanlihe and other areas have hard water, and the hardness is generally around 400 mg/L.

(Water hardness is above 170mg/l, and scaling occurs. )

Generally speaking, the water quality in the old town of Wanaji is very poor, especially in Cheng Nan. Now people in Jiugong area dare not boil water by themselves, and all use pure water. It is said that the proportion of patients with stones is much higher than that in other areas. It is recognized that the water quality in the northwest suburb is good, and the emperor drinks the water from Yuquan Mountain.

Of course, the specific situation is different. If the building is located in the old site of a chemical plant or a landfill, and groundwater is used, it will be very tragic. Old pipes are old, and rust or secondary pollution is also terrible. Some buildings have water storage tanks on the roof, but pollutants such as dead animals are common and will affect the water quality. So to sum up, pure water should be drunk directly, and it must be cautious.