Table II.
Results of the Bacteriological Examination of the Kowloon Water Supply for the year 1916.
Rate Total Colo- Sample. Date. nies on Agarin 1 cc Filtra- at 37°C. for tion. 24 hours. cc. MacConkey's Lactose Neutral Red Bile Salt Peptone Water. Presence of the Coli Group. 1 cc. 2 cc. 5 cc. 10 cc. 20 cc. 50 cc. Unfiltered, 4-1-16. 5 + + + + + + Filtered, 55! 4-1-16. Groups I, III, & IV in 20 cc. Negative in 50 cc. Unfiltered, 6-1-16. 35 + + + + + + Filtered, 552 6-1-16. 5 Groups II, III & IV in 2 cc. Negative in 50 cc. Unfiltered, 8-1-16. 40 + + + + + + Filtered, 553 8-1-16. 10 Group II in 2 cc. Group III in 50 cc. Unfiltered, 4-4-16. 85 + + + + + + Filtered, 527 4-4-16. 25 Group IV in 2 cc. Unfiltered, 6-4-16. 60 + + + + + + Filtered, 534 6-4-16. 15 Groups I & IV in 20 cc. Unfiltered, 8-4-16. 50 + + + + + + Filtered, 540 8-4-16. Groups III & IV in 2 cc. Unfiltered, 4-7-16. 70 + + + + + + Filtered, 560 4-7-16. Groups I & IV in 50 cc. Unfiltered, 6-7-16. Filtered, 441 6-7-16. Unfiltered, 8-7-16. Filtered, 565 8-7-16. Groups I, III & IV in 2 cc. Negative up to 50 cc. Unfiltered, 3-10-16. Filtered, 624 3-10-16. Group IV in 2 cc. Unfiltered, 5-10-16. Filtered, 610 5-10-16. Group IV in 50 cc. Unfiltered, 7-10-16. SS + + + + + + Filtered, 608 7-10-16. 15 Group III in 2 cc.Filtered,
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.