<prompt> Not seen in faecal pollution -StaphylococcusStreptococcusE. ColiClostridium perfringens  <response>: The primary bacterial indicators of contamination of water are the coliform group. Supplementary indicators include faecal streptococci and sulphite-reducing clostridiaC.perfringens Parks Textbook of Preventive and Social Medicine, 25th edition, Page No. 780,781 