Bacteria Drinking water standards  (IS : 10500, 1991) Sources Percentage of water samples exceeding BIS limits (%) in different seasons Winter Summer Monsoon   E. coli   Should be absent per ml Jayakwadi dam 66.67 66.67 100 Bindusara dam 66.67 66.67 100 Bindusara river 100 100 100 Sindhfana river 100 00 100 Tap water 66.67 33.33 66.67   S. typhi   Should be absent per ml Jayakwadi dam 66.67 66.67 66.67 Bindusara dam 66.67 66.67 66.67 Bindusara river 100.00 100.00 100.00 Sindhfana river 66.67 00 100.00 Tap water 00 00 0.00   S. aureus   Should be absent per ml Jayakwadi dam 66.67 66.67 66.67 Bindusara dam 66.67 66.67 66.67 Bindusara river 75.00 75.00 75.00 Sindhfana river 66.67 00 33.33 Tap water 00 33.33 0.00   P. aeruginosa   Should be absent per ml Jayakwadi dam 33.33 66.67 66.67 Bindusara dam 33.33 66.67 66.67 Bindusara river 50.00 75.00 75.00 Sindhfana river 33.33 00.00 66.67 Tap water 00 00 00   B. cereus   Should be absent per ml Jayakwadi dam 33.33 66.67 66.67 Bindusara dam 33.33 66.67 66.67 Bindusara river 100.00 100.00 100.00 Sindhfana river 100.00 00 100.00 Tap water 00 00 00   V. cholerae   Should be absent per ml Jayakwadi dam 00.00 66.67 00 Bindusara dam 33.33 66.67 33.33 Bindusara river 100.00 100.00 100 Sindhfana river 33.33 00 100 Tap water 0.00 0.00 00   T. coliforms   NMT 1/100 ml Jayakwadi dam 100 100 100 Bindusara dam 100 100 100 Bindusara river 100 100 100 Sindhfana river 100 00 100 Tap water 100 100 100   F. coliforms   NMT 1/100 ml Jayakwadi dam 100 100 100 Bindusara dam 100 100 100 Bindusara river 100 100 100 Sindhfana river 100 00 100 Tap water 100 100 100

Table 3: Water quality with reference to standard for drinking water and percentage of samples exceeding BIS limits during different seasons.