Industrial pollution sources of water environment refer to production equipment or production sites that have harmful effects on the environment in the process of industrial production and have the following characteristics:

(1) Wide range of pollution, large discharge, discharge mode is complex. Industrial enterprises spread all over the country, pollution range is wide, many products in use will produce new pollution. Industrial production water consumption is large, a considerable part of production water carries raw materials, intermediate products, by-products and end products, and so on out of the factory. The discharge mode of industrial wastewater is complex, including intermittent discharge, continuous discharge, regular discharge and irregular discharge.

(2) There are many kinds of pollutants and their concentration fluctuates greatly. There are a wide variety of industrial products and different production processes. Therefore, a wide variety of pollutants are discharged in the process of industrial production, and there are great differences in the nature and concentration of different pollutants.

(3) Strong toxicity of pollutants, great harm. The wastewater polluted by acid, alkali and toxic substances in the industrial process is irritating and corrosive, and does great harm.

(4) The migration and change rules of pollutants after discharge are very different. The nature of various pollutants in industrial wastewater varies greatly, some of which have strong toxicity, accumulation and stability. Once the pollutants are discharged, the migration and change rules are very different. Some of them are deposited in the water bottom, some volatilize into the atmosphere, some are enriched in the biological body, and some decompose into other substances, and even cause secondary pollution, which makes the pollutants more dangerous.