Current Water Quality Status: In recent years, surface water quality has deteriorated, and pollution has become increasingly severe. There are many sources of pollution, and the main causes of online water quality testing are: land-based pollutants. According to statistics, every year, China discharges up to 6 billion tons of sewage and industrial wastewater into rivers and oceans, especially in the eastern coastal areas, where many newly developed areas and population clusters are concentrated, putting enormous pressure on local water resources and the environment.

    Pollutants emitted by ships. During navigation, ships produce a lot of oily wastewater, which is very detrimental to the health of freshwater resources. Moreover, with China's rapid economic growth, the number of motorized vessels is increasing every year, with some foreign vessels entering ports, totaling hundreds of thousands, severely threatening water resources.

    Manual dumping of waste pollution. For a long time, many people have used water as the best "machine" for waste disposal, handing over all the waste and pollutants from various days to water for treatment. This phenomenon is very evident in coastal cities, where pollutants are often dumped into rivers and flow into the sea, gradually devouring human living environments.

    Implementing surface water quality monitoring is a very important link in addressing current environmental pollution. By using effective methods to detect, reflect, and control social environmental resources, and to improve environmental and resource issues, we can fundamentally achieve economic benefits while also balancing ecological and environmental benefits.