The origin of tap water

Tap water for domestic use is mainly drawn from rivers, lakes and groundwater through the water pumping station of the water plant, surface water, by the water plant in accordance with the "National Health Standards Related to Drinking Water", after precipitation, disinfection, filtration and other processes, and finally through the distribution pumping station to the various users.

Tap water has a variety of sources: groundwater, reservoir water, river water, if the depth of treatment, sewage, seawater can be, just different treatment costs.

The general process: reaction, precipitation, filtration, disinfection, it can be sent to the pipe network. According to the different water sources, control of different indicators for the design of the relevant process. For example: softening, deodorization (such as water pollution, bad smell), depth filtration and so on.

Water plant building according to the process is generally: distribution wells, reaction sedimentation tank (coagulation and precipitation, reduce turbidity), non-valve filter (filtration and post-filtration disinfection), clear water tanks, pipe network.

Expanded Information:

There are some problems with the water. p>Tap water has the following problems:

One, heavy metal pollution

China about 50% of surface water sources are contaminated, hundreds of organic compounds, heavy metal ions into the water source, groundwater sources exist fluoride, arsenic, iron, manganese and other exceeding the standard and other problems.

Second, the poor quality of water pipe network

Survey shows that the quality of China's urban water supply network is generally poor, does not meet the national standard of grey cast iron pipe accounted for 50.80% of the ordinary cement pipe accounted for 13%, galvanized pipe, etc. accounted for 6%. The old pipe network leakage is serious, often burst pipe, from the point of view of water quality, easy to secondary pollution.

Baidu Encyclopedia - Tap Water