<prompt> Which of the following is a bacteriological indicator of water quality?Staphylococcus aureusClostridium tetaniE.coliYersinia pestis  <response>: Coliform organisms: Primary most reliable bacterial indicator for water quality. E. coli is most impoant coliform indicator. Fecal streptococci: Indicate recent contamination of water. Clostridium perfringens: Indicate remote contamination of water. 