Common indicator organism of water pollution is:

Step-by-step solution

The most common indicators are Coliforms, E. coli, and Enterococci. The presence of bacteria commonly found in human faeces, termed coliform bacteria (e.g., E. coli), in surface water is a common indicator of faecal contamination. Related Theory Indicators of potential human or fecal contamination or of possible presence of pathogens include Staphylococci, Escherichia coli, fecal coliforms, Enterococci and Pseudomonas aeruginosa. Indicator organisms are used to assess overall sanitation or environmental conditions