In the water supply industry, there has always been a debate about who is the earliest water supply city. Shanghai is one of them, because it established the first water plant in China at 188 1. In fact, the history of tap water in Dalian can be traced back to 1879. (The water supply construction in the following table 1 has nothing to do with the China municipal government and is not included in the ranking).

At the end of the Qing Dynasty, Li Hongzhang, Minister of Beiyang, played "Chiseling Stones to Get Springs" to the Qing court, and built the first set of water supply facilities in China in Yinglongquan, Lushun Navy, which initiated the water supply in modern China. This water supply project took 10 years, with 1 pool built, 728m tunnel built, and 6180m water pipes made of ceramics and cast iron, which can supply water for more than 20,000 people. Its water supply function lasted for 100 years.

In the National Archives, you can find the complete inscriptions of Li Hongzhang's memorial and Long Yinquan. At present, it is generally believed that Dalian is the first water supply city in modern China.

Tap water is drinking water produced by professional equipment through many complicated technological processes. The treatment process of tap water is as follows:

First of all, the water source must be pumped from rivers and lakes to water plants (the amount of water taken in different regions is different, and the water source directly affects the drinking water quality in a region);

Then after coagulation, sedimentation, filtration and disinfection, it is pumped into the tap water pipeline by the water pump under high pressure. Generally, the main pipeline adopts prestressed concrete pipe, steel pipe, PE pipe, ductile iron pipe and other pipes;

Finally, it is diverted to the user's faucet. The whole process has to go through many water quality tests, and some places have to go through secondary pressurization and secondary disinfection before they can enter the user's home. Rank city water supply time and sponsor coverage area. Remarks 1 Hong Kong 1963 S.B. Luoning City, King's Home Engineering Department, is not included in the overall ranking. 2 Dalian 1879 Li Hongzhang, Qing government, 7 km artificial river channel +6 km pipeline, 20,000 people benefited from 3 Shanghai 1883.08.0 1 British businessman J.W. Hedfa Concession, with a daily water supply of 3,698 cubic meters; 4 Tianjin 1899, with a daily water supply of British businessman Yan Chai Foreign Company 1363 cubic meters; more than 20 households benefited from 5 Changchun/KLOC-0. Kloc-0/899 Freshwater Town, Goto, Governor General of Taiwan Province Province, the first city with tap water in Taiwan Province Province 7 Qingdao 1899 German colonial government 8 Keelung 1902 Governor General City of Taiwan Province Province 9 Harbin 1903 Middle East Railway. Bureau Qinjiagang Railway Station 10 Guangzhou 1908. 10 Guanqing-Shanghai Business Co-organized Zengbuhe Area to supply water to more than 600 households nearby1Taipei 1909.04 Governor's Office City of Taiwan Province Province104. 0 ton 13 Chengdu 1909 urban area 1926 No.1 water plant closed 14 Beijing 19 10.03 More than 3,000 people in Dongzhimen area of Cixi benefited from the Qing government 15 Shenyang/kloc. Kloc-0/7 Chongqing 1932.03.0 1 Chongqing Commercial and Port Department Pan Wenhua City1933.04.11Nanjing National Government's daily water supply is about 65438.