What aspects does water pollution include?

1. Plant nutrient pollutants: industrial sewage such as papermaking, food, oil refining, leather and synthetic detergent. They are all domestic sewage, phosphate fertilizer and nitrogen fertilizer, containing nitrogen, phosphorus, potassium and other substances. If this sewage enters the water in large quantities, it will increase nutrients and lead to the explosive reproduction of algae and other oil slick organisms, which is called "red tide organisms". This creature will multiply and cover the water and attach to squid. Dead red tide organisms are decomposed by microorganisms, consuming dissolved substances in water. Some red tide organisms and their substitute products contain biotoxins, which often lead to the death of aquatic organisms and endanger human health through the food chain.

2. Aerobic pollutants: sewage from water, paper and video industries. These liquids will contain organic substances such as oil, protein and carbohydrates. After these substances enter the water, microorganisms need to consume dissolved oxygen in the water in the process of decomposing them, which will lead to the decrease of oxygen content in the water, thus affecting the survival and reproduction of aquatic organisms. When the dissolved oxygen in the water is exhausted, the organic matter in the water will produce anaerobic jokes and produce hydrogen sulfide, methane and so on. And it smells bad, which will do harm to the creatures in the water.

3. Pathogen pollution: domestic sewage, livestock and poultry farm wastewater, hospital sewage, etc. They all contain pathogens, including viruses, germs and parasites. If these sewage flows into the water improperly, it will cause the spread of various germs and endanger human health.

4. Highly toxic pollutants: mainly heavy metals, fluorides, cyanide and refractory organic substances, all of which are wastewater from mining and smelting. There will be radioactive pollution after entering the water. Salt pollution, all kinds of inorganic compounds of acid, alkali and salt enter the water, which will affect the water quality.

legal ground

People's Republic of China (PRC) Water Pollution Prevention and Control Law

Article 1 This Law is formulated for the purpose of protecting and improving the environment, preventing and controlling water pollution, protecting water ecology, ensuring the safety of drinking water, safeguarding public health, promoting the construction of ecological civilization and promoting sustainable economic and social development.