276
Sample IX.—Kodappamund Reservoir.
(a) Total colonies on agar at 37°-1,890.
(b) Bile salt lactose medium.
+
—
I tube 20 cc. of water taken
..
1 ..
2 tubes 10 cc.
,,
..
2 . .
4
5 cc.
,,
. .
4 ..
5
„
1 cc. ,,
..
5 ..
5 ,,
•1 cc.
,,
..
5 ..
5
., •01 cc.
,,
..
.. 5
(c) Faecal bacilli in •1 cc. and upwards.
(d) Sporogenes milk test —
in 20 c.c.
col ony
No. Saccher ose. Dul c i t .
Ad o n e t .
Inul i n.
V o g e s o r p r o s k . Mobi l i t y.
G r o u p .
Bacillus.
Group a n d R e m a r k s .
B. Lactis ærogenes or
capsulatus.
B. Coscoroba.
B. Cloacæ.*
B Grunthal.*
B. lactis ærogenes or
capsulates
B. Cloacæ.*
B. lactis æ rogenes or
capsulatus.
Do.
I
2
3
4
5
7
8
9
10
+
+
+
+
+
— +
+
+ +
+
—
+
— — — — — — —
— + — — — — + —
+
+
— — — — — — — — — —
+
+
+
— + — + + + +
— — — — — — — —
—
—
III
IV
III
IV
IV
I
IV
IV
IV
IV
Group I
,,
I I
, , I I I ,
" IV,
REPORT.
Dodabetta, Upper.—This water is now very good ; it contains no fœcal bacilli in 50 cc. This is an improvement O n
quarter ; evidently at that time the early washings of the catchment area had polluted the water to a considerable e
The heavy rains and the intervals of sunshine have produced an improvement.
Dodabetta, Lower.—There is not the same improvement in this reservoir ; fœcal bacilli are present in 1 cc
quarter in • 1 cc. But the pipe line still shows the same very striking improvement ; for there are no fœcal bacilli in
This is an example of the beneficial influence of pipes on water.
Tiger Hill.—The water at this time of year contains fœcal bacilli in • 1 of a cc., last quarter in 5 cc. Then'
marked falling off in quality. It is quite impossible to explain these variations ; all these catchment areas are preserved
equal care and all are on the sides of Dodabetta, a hill that has no inhabitants at that altitude. The Tiger Hill pipe line,
the Dodabetta Lower, yields a water containing one fœcal bacilli in 50 cc.
Marlimund Reservoir.—Contains fœcal bacilli in 1 cc. This is worse than last quater. The pipe line
them in 5 cc.
Of all the supplies in Ootacamund the Marlimund is the worst. It is the only supply in which true coli command
are found. Further, it is the only supply that deposits silt in the pipes. Unlike the other supplies, the water in the
is worse in quality than that in the reservoir because the silt in the pipes is adding objectionable bacilli to a water ;
disappeared from the reservoir by this time by sedimentation and action of the sun.
The reason for this state of affairs is not far to seek. The catchment area is extremely badly preserved
inspection shows. At my visit I found that there had been nine men sawing up timber for a period of over two months with
a hundred yards of the lake. A great proportion of the work on which these men were engaged, viz., cutting up
could have been done outside the catchment area. Felling trees may be a necessity , but the sawing of beams need
done near the lake. Further, there is a path that is evidently frequently used running from the Marlimund Rosd
Ootacamund. It is a short cut to the town ; the guard do not stop people who go by this road.
Recommendations—
(i) Preserve the catchment area properly ; allow as few people as is absolutely necessary to go to the forest
;out trespassers and stop the use of the foot-path.
(ii) Wash oat the pipe line with the Tiger Hill water by opening the stop cocks as often as water can be spard
Kodappamund water is not so good as last quarter, fœcal bacilli being present in •1 cc.
Old Ootacamund also shows a slight falling off as it contains fœcal bacilli in 5 cc.
Chemically the waters are all of them very soft and good waters particularly those from Dodabetta. Marlimund
the least satisfactory of the lot and could not be called a first-class water.