1) Dropping a reservoir of untreated or inadequately treated sewage from industrial enterprises, urban and rural economies, 2) Residues of fertilizers and pesticides that are washed away by melt and rain waters. 3) Production and widespread use of par, particularly in the detergent causes the assignment of the wastewater in many water bodies, including at the source of household security. The main danger – not irrevocability of use, and pollution of natural waters by industrial effluents. The physical condition of pollution share: insoluble, colloidal, soluble. Of nature: mineral, organic, bacterial, biological. Minerals – sand, clay particles, min. Newcastle University recognizes the significance of this.

salt, acid, meadows, etc. Organic – 1) Plants: the remains of plants (vegetables, cereals, oil). 2) Animals: Physiological. Private. animal and human remains animal tissues and other bacterial and biological pollution – domestic waste water and waste water of some indus.

enterprises (leather factories processing of wool, fur production, biofabrikaty, the n-th microbiological industry) should be noted that in the water biological pollutants are particularly important ahead of the danger even chemical. This happens when the water becomes a vital environment for pathogens. With it through the air (most often microdrops saliva or water) are transferred to a few diseases, and water – they are the majority. Waterborne bacterial diseases are transmitted, such as cholera, typhoid, bacillary dysentery, viral infections: hepatitis A, polio, and dysentery, caused by the simplest – dysenteric amoeba and shistosomiaz, which is caused by parasites. Increased biological hydrosphere pollution due to anthropogenic influences can be attributed entirely to the "revenge" of nature, to counteract the effects of excessive intervention by the very large number of people in the surrounding environment. In support of this assessment of the situation can cause the following facts: Anthropogenic changes in the physical and chemical conditions of the environment has already led to several cases of propagation forms of bacteria with the transformation of a much pathogens. Abroad widest publicity gained the appearance of fundamentally new "Legionnaires' disease, caused by a mutation in a common inhabitant of wetlands, as legionela. Staff gentile houses around the world have to cope with illness caused by childbirth blue pus bacilli. Based on common law , experts say that the phenomenon of biological environments has only begun. In the future the situation deteriorate if people's behavior does not change