Yes, the sewage water does contain its own microflora. However, often enough, these microbes do not have the capability to effectively degrade the vast spectrum of pollutants that contribute to the organic load in sewage water. Not just this, they could be pathogenic in nature as well. Microbes in sewage treatment require to be versatile, tenacious and capable of adapting to shockloads as well. Addition of specially selected microbes in sewage treatment like those present in Cleanmaxx STP help in improving the efficiency of sewage water treatment by accelerated degradation of a variety of organic pollutants present in it.