Table V.
Results of the Bacteriological Examination of the Pokfulam Water Supplies for the
year
1921.
All samples were 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.
Table V.
Results of the Bacteriological Examination of the Pokfulam Water Supplies for the
year
1921.
Sample.
Date.
Rate of 'filtra-
tion.
Total Colonies
Coliform Organisms.
on Agar
in lee
at 37° C.
20 c.c.] 10 c.c. 5 e.c. J
0.0. [0·1 c.c.
Unfiltered, 3-1-21.
47
Group IV type in 5 c.c.
Filtered,
3-1-21.
7
Absent from 60 c.c.
Unfiltered.
1-2-21.
45
Group II and III present in 5 c.c.
Filtered,
1-2-21..
1
Absent from 60 e.c.
Unfiltered,
7-3-21.
90
Filtered,
7-3-21.
Unfiltered,
4-4-21.
133
Filtered,
4-4-21.
Unfiltered.
2-5-21.
23 105
Filtered.
2-5-21.
7
Unfiltered,
6-6-21.
866
Filtered.
6-6-21.
12
Unfiltered,
4-7-21.
936
Filtered,
4-7-21.
35
Unfiltered,
8-8-21.
1,760
Filtered,
8-8-21.
111
Unfiltered,
5-9-21.
946
Filtered,
5-9-21.
38
Unfiltered,
3-10-21.
uncountable,
Filtered,
3-10-21.
28
Unfiltered,
7-11-21.
117
Filtered,
7-11-21,
14
Unfiltered,
5-12-21.
IB3
Filtered,
5-12-21,
11
+ + 1 + 1 + 1+++ + + + 1 + 1 + 1 +
+1 +1 +1 +1 +1 + + + !+ 1 + 1 | 1
+ i + + + + +1 +1 +1 +1 | |
wwww....
+1 +1 +1 +1 +1 +1
+1 +1 +1 | |
Enteritidis
sporogenics.
Streptococci.
1
+++++
Presence of the Coli group.
Group II.
Group IV.
Group IV.
Group II and III.
Group III.
+
Group I.
Group 3.
All samples were 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. Classfication of the Coli group is that of MacConkey, + = Acid and Gas. Acid only, = No Change.
Neid 1
M (1) 30
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