The difference between Yanjiao water and Beijing water.

Different water sources and different geographical environments. The main source of water supply in Beijing is the water resources of the North Canal, the South Canal and the surrounding reservoirs, while Yanjiao relies on groundwater. Beijing is a big city, affected by industrial emissions, traffic pollution and other factors, which will have a certain impact on water quality. Yanjiao is relatively suburban, and the environment is relatively good, but pollution should be prevented.