 The coastal zone area of Chianghai City is one of the most important coastal zones in the South China Sea. Its water environment has been negatively impacted by human activities like urbanization and industrialization. To protect the water resources and ecology of this region, the water chemistry characteristics of the main watersheds and their causes have been investigated. This study found that the dominant cation in the coastal zone of Chianghai City is sodium chloride with a mean value of 35.001 milligrams per liter. The dominant anion is chloride with a mean value of 30.69 milligrams per liter. Additionally, the dominant cation content in the coastal zone of Chianghai City is sodium greater than calcium greater than magnesium greater than potassium, while the dominant anion content is chloride greater than sulfate greater than bicarbonate greater than carbonate. At the five collection sites in the study area, the ion concentrations varied significantly with the highest concentration in the water samples taken from aquaculture ponds and the lowest concentration in the water samples taken from rivers. The main water, CAM. This article was authored by Juni Jiang, Go Wei Fu, Yu Feng, and others. We are article.tv, links in the description below.