After the earthquake, large areas of buildings in the disaster areas collapsed, centralized water supply was interrupted, and water supply facilities were severely damaged. Decentralized water supplies and rural water supplies were also damaged to varying degrees, such as sand accumulation in water pipes, well casing misalignment and cracking, etc. It was extremely hot at that time, and people urgently needed drinking water and water for other uses. In the absence of drinkable and suitable water sources or water transportation tools, people had no choice but to take various unhygienic water sources nearby, including rainwater, puddle water, pond water, river water, swimming pool water, and even industrial wastewater, etc. As a result, the incidence of intestinal infectious diseases among residents rose sharply.