Table III.
Results of the Bacteriological Examination of the Tytam Water Supply for the year 1914.
Rate of Sample. Date. Total Colonies on Salt Peptone Agar in 1 cc Filtra-tion. MacConkey's Lactose Neutral Red Bile at 37°C. for 24 hours. cc. Presence of the Coli Group. 2 cc. 5 cc. 10 cc. 20 cc. 50 cc. Unfiltered, 5-1-14. 125 + + + + + +++++ Filtered, 5-1-14. 646 60 + + + + + + Unfiltered, 7-1-14. 100 + + + + + +++ Filtered, 7-1-14. 646 35 + + + + + Negative up to 5 cc. Unfiltered, 9-1-14. 130 + + + + + 50 Filtered. 9-1-14. 640 30 + + + + + 35 Unfiltered, 6-4-14. 75 + + + + + 2 Filtered, 6-4-14. 790 34 + + + + + > Unfiltered, 8-4-14. 85 + + + + + " Filtered, 8-4-14. 790 30 + + + + + 50 Unfiltered, 10-4-14. + + + + + Group I in 2 cc, Negative in 50 cc. Filtered, 10-4-14. 790 + + + + + Group II in 1 cc. Negative in 50 cc. Unfiltered, 6-7-14. + + + + + Group I in I cc. Negative in 50 cc. Filtered, 6-7-14. 576 + + + + + Groups I and IV in 2 cc. Negative in 50 cc. Unfiltered, 8-7-14. 110 + + + + + Group IV in 1 cc. Filtered, 8-7-14. 780 45 + + + + + II "" Unfiltered, 10-7-14. 115 + + + + + "" Filtered, 10-7-14. 507 60 + + + + + ++FF++ Unfiltered, 5-10-14. 65 + + + + + " Filtered, 5-10-14. 776 15 + + + + + 15 Unfiltered, 7-10-14. 1 + + + + + III To cc. II 1 cc. Filtered, 7-10-14. 783 55 + + + + + 19 Unfiltered, 9-10-14. 50 + + + + + II 10 cc. Filtered, 9-10-14. 621 20 + + + + + Negative up to 10 cc.All samples taken either immediately before or immediately after filtration.
The rate of filtration is given by the Water Authority in gallons per square yard per day. Classification of the Coli Group is that of MacConkey,
+ Acid and Gas;
+ Acid only;
No change.
- L 88