a 100mL sample was inoculated into the 97-well IDEXX tray with its
corresponding reagent (Colilert®) and incubated at 35°C for 24 hours. The result of IDEXX Quanti-Tray® was
then read to determine the most probable number (MPN) of total coliform and E.coli. For the H2S test, 20 mL of the
water from each sample was inoculated to the test and incubated at ambient temperature for 24 and 48 hours