“…He also noted that staphylococci could be found in some f airly well-run swimming pools with high chlorine residuals (personal communication, E. C. Dick, 1962 and others (7,8) In a study of the effect of free and combined available chlorine upon bacteria in swimming pools, Mood (10) showed that streptococci were more resistant to both free and combined avail¬ able chlorine than were the coliform bacteria.…”