(3) Impact on residents' health

Groundwater and fresh water in the sea (salty) water intrusion area are polluted and become salty, so it is very difficult for people and animals to drink water and the living environment tends to deteriorate. To this end, the local government and the masses have spent a lot of money and taken many measures, such as digging a deep well more than 200 meters deep after the shallow fresh water in Weibei Plain was polluted. In some places, there is no fresh water or the F- content is too high, so there is no condition to transfer water from other places, so we can only drink salt water or high fluorine water.

Drinking inferior water for a long time leads to an increase in the incidence of some water-related diseases. According to the health department's investigation in seven urban areas, including Hanting and Longkou, along the coast of Laizhou Bay in the early 1990s, the number of people suffering from goiter, dental fluorosis, skeletal fluorosis, brucellosis and liver fluke disease reached 455,000. Among them, the number of patients with endemic fluorosis in Shouguang increased from 200,000 to 400,000, and the number of patients with dental fluorosis in Laizhou increased from 3,076 in 1.978 to 1.5000, an increase of nearly five times.