Assessment of Environmental Risks from the Impact of Domestic and Industrial Effluents

Abstract

A comprehensive assessment of the ecological state of the surface water body in the study area was carried out using the method of calculating the water pollution index, which allows obtaining an integral assessment of the ecological state of surface waters based on the frequency of exceeding the MPC of individual components. It was established that the wastewater of the utility enterprise worsens the water condition of the Siverskyi Dinets River, since the values of the water pollution index of the WPI 500 m before the discharge site (fluctuations in the range from 6.30 to 8.08) are greater than the WPI values at the same time 500 m below the site reset (fluctuations in the range from 6.93 to 8.15), especially this applies to the warm period of the year. The environmental risk assessment depends entirely on the values of the WPI, and is obtained by arithmetic operations with an index and certain constants. The results of the calculation of environmental risk show that the impact of wastewater of a municipal enterprise increases the value of the environmental risk for the Siverskyi Dinets River, in particular for July - September - from acceptable to unacceptable (values from 0.000000881 to 0.00000157).