153
DINDIGUL.
WATER SAMPLES TAKEN—11TH NOVEMBER 1912.
Remarks.—Water is derived from two sources (1) an infiltration gallery and. (2) a deep we
ll. Infiltration gallery was used as a source of supply when samples were taken.
The supply is intermittent. There has been about 15-98 inches of rain since last
analysis.
Bacteriological Analyses.
SAMPLE 1.—TAP IN FRONT OF PUMPING STATION (DEEP WELL).
Number .
L a c t o s e .
S a c c h a r o s e .
D u l c i t e .
A d o n i t e .
I nul i ne.
V o g e s a n d P r o s k .
Indol.
Mo t i l i t y G r o u p
Name of Bacilli.
Group and
Remarks.
Total colonies per cc. on agar at 37° C.—6,150.
Bile salt lactose, medium.
+
-
1. tube of 20 cc.
...
...
. . .
1
. . .
1
+
+
- - -
- +
- IV B. Coscoroba
. . . Group I, nil.
2 tubes of 10 cc.
. . .
. . .
. . .
. . .
2
. . . 2 + + - - - - + - IV
Do.
. . .
„ II, nil.
3
„
5 cc.
...
. . .
. . .
. . .
. . .
3
. . .
3 + + - - - - + - IV
Do.
... „ nil.
3
„
1 cc.
. . .
. . .
. . .
...
2 1
4 + + - - - - + - IV
Do.
. . .
„ IV, 10.
3
„
.1 cc.
... ... ... ...
1
2
5 + + - - - - + - IV
Do.
3
„
.01 cc.
. . .
. . .
. . .
. . .
1
2
6 + + - - - - + - IV
Do.
Fœcal bacilli present in 5 cc. and upwards.
7 + + - - - - + - IV
Do.
8 + + - - - - + - I V
Do.
... Class I, nil.
9 + + - - - - + - IV
Do.
„ II, 10.
No vibrios in 100 cc.
10 + + - - - - + - IV
Do.
. . .
„ III, nil.
SAMPLE II.—FOUNTAIN NO. 19 IN EASTERN END.
No lactose fermenters.
Total colonies per cc. on agar at 37° C.—200.
Bile salt lactose, medium.
+
-
1 tube of 20 cc.
...
...
..
...
. . .
1
2 tubes of 10 cc.
...
...
...
...
. . .
2
3
„
5 cc.
...
...
... ...
. . .
3
3
„
1 cc.
....
...
...
...
. . .
3
3
„
1 cc.
...
...
...
...
. . .
3
3
„
.01 cc.
...
...
...
. . . 3
Fœcal bacilli not present in 60 cc.
No vibrios in 100 cc.
SAMPLE III.—FOUNTAIN No. 10 IN DROUPADI AMMEN STREET.
1 +
- +
- - - + - II B. Schaefferi
... Group I, nil.
Total colonies per cc, on agar at 37° C.—80.
2 +
- + - - - + _ II
Do.
. . .
„ II, 9.
3 + + + + - + - - III B. 67...
..
„ III, 1.
Bile salt lactose, medium.
+
-
4 + - +. - - - + - II B. Schaefferi ...
„ I V ,
n i l .
5 + - + - - - + - II
Do.
6 + - + - - - + + II B. Coli Communis..
1 tube of 20 cc.
...
...
. . . 1
. . .
7 + - + - - - + - II B. Schaefferi.
8 + - + - - - + - II
Do.
. . . Class I, 9.
2 tubes of 10 cc.
...
...
...
. . .
. . .
2
9 + - + - - - + + II B. Coli Communis ... „ II, 1.
3
„
5 cc.
...
...
. . .
. . . 3
. . .
10 + - + - - - + - II B. Schaefferi
...
„ III, nil.
3
„
1 cc.
...
...
. . .
. . .
. . .
3
3
„
.1 cc.
...
...
. . .
...
. . .
3
3 „ .01 cc.
...
...
...
. . . . . .
3
Fœcal bacilli in 5 cc. and upwards.
No vibrios in 100 cc.
REPORT.
Sample No. I is evidently well water and shows a huge total count and one fœcal germ to the cc. It is
rather softer than the water as distributed. The supply was however being derived from the infiltration
gallery and as found from fountain No. 19 in the Eastern end was of quite exceptional purity. Far other-
wise is it however in Droupadi Ammen Street here we find pollution, not very large in amount but of a most
objectionable kind. The fœcal germs belong almost entirely to Class I, which are indicative of recent and
potentially dangerous pollution. It is notable that pollution of this type and in even less amount occurred
in this situation at this season last year. It suggests very slight defects in the pipe joints through which
pollution is sucked during the periods of negative pressure due to the intermittency of the service. To what-
ever cause due it should be seen to as soon as possible as such a state of affairs might lead to results of a
very serious kind.
Chemically the water is very hard but otherwise fair.