Overview of Well Water and Groundwater Treatment Systems 　　Well water and groundwater refer to water bodies that are buried underground and exist in the pores of rocks and soil, allowing them to flow. With the continuous acceleration of industrial processes, environmental pollution is becoming increasingly severe, and groundwater is inevitably contaminated. In terms of pollution level, northern cities generally have heavier pollution than southern cities, with more pollution elements and higher exceedance rates, especially in the North China region where pollution is most prominent. From the perspective of pollution elements, "three nitrogen" pollution is prominent throughout the country and is widely affected by pollution; Mineralization and total hardness pollution are mainly distributed in Northeast, North, Northwest, and Southwest regions; Iron and manganese pollution are mainly distributed in southern regions. Process methods for treating well water and groundwater The treatment of well water and groundwater is mainly aimed at removing harmful substances such as iron, manganese, ammonia nitrogen, sediment, and scale, so that the treated water quality meets the national drinking water standards. At present, the main treatment for well water and groundwater is to remove iron and manganese. In China, the high content of iron and manganese in groundwater is quite common. The removal of iron and manganese is mainly carried out through aeration and filtration. The filtering media used for filtration are usually quartz sand and manganese sand, which are then filtered through activated carbon and precision filters. After treatment, the water quality can basically meet the national drinking water standards. Ammonia nitrogen is mostly filtered using ultrafiltration or reverse osmosis processes, while sediment and scale can be filtered using multi-media filtration and ion exchange softening devices.