Question

Effects of dumping untreated sewage into a river​

Answer 1

Dumping untreated sewage into a river can have a number of negative impacts on the environment and human health. The sewage can pollute the water, affecting aquatic life, and can lead to the spread of disease-causing pathogens. The pollutants in the sewage can also cause algal blooms, which can reduce water clarity and oxygen levels, causing fish kills. In addition, the presence of sewage can cause an unpleasant odor and can lead to increased levels of bacteria, which can make the river unsafe for swimming and other recreational activities.

Answer 2

Life-threatening human pathogens carried by sewage include cholera, typhoid and dysentery. Other diseases resulting from sewage contamination of water include schistosomiasis, hepatitis A, intestinal nematode infections, and numerous others.