175
Chemical Analyses.
SAMPLE No. II.
SIMPLE No. I.
Physical
appearances.
Colour and
Transparency.
Colourless and clear.
Colour less and clear.
Smell.
None.
None.
QUANTITATIVE.
Total solids
..
..
..
..
.. Parts per 100,000
40.400'
45.200
Temporary hardness ..
.. ..
Do.
..
20.000
23.000
Permanent hardness ..
..
..
..
Do.
..
1.000
5.000
Total hardness
..
..
..
..
Do.
..
21.000
28.000
Chlorine
..
..
..
..
..
Do.
..
3.195
3.017
Ammoniacal Nitrogen
..
..
..
Do.
. .
Trace.
0.003
A l b u m i n o i d N i t r o g e n
. .
. .
. .
Do.
. .
0.011
0.003
Oxygen absorbed ( Tidy's Process) ..
..
Do.
. .
0.013
0.008
Nitric Nitrogen
..
..
..
Do.
..
0.050
0.200
QUALITATIVE.
Nitrites
..
..
..
..
..
..
..
..
Nil.
Nil.
Sulphates ..
..
..
..
..
..
..
..
..
Present.
Present.
Phosphates..
..
..
..
..
..
Nil. Nil.
Iron, poisonous metals ..
..
..
Nil, Nil.
Nil, Nil.
SAMPLE NO. IV.
Physical
appearances.
Colour and
Transparency.
Colourless and. clear.
Smell.
N o n e .
QUANTITATIVE.
Total solids
..
..
..
..
.. Paits per 100,000 ..
41.000
Temporary hardness ..
..
..
..
Do.
..
20.00
Permanent hardness ..
..
..
..
Do.
..
2.500
Total hardness
..
..
..
..
Do.
..
23.000
Chlorine
..
..
..
..
..
Do.
..
3.195.
Ammoniacal Nitrogen
..
..
..
Do.
. .
Trace.
Albuminoid Nitrogen.
..
..
..
Do.
..
Trace.
Oxygen absorbed ( Tidy's Process) ..
..
Do.
..
0.008
Nitric Nitrogen..
..
..
..
..
Do.
. .
0.087
QUALITATIVE.
Nitrites
..
..
..
..
..
..
..
..
..
N i l .
Sulphates
.. . .
P r e s e n t .
Phosphates
..
..
. .
Nil.
Iron, poisonous metals .. .. .. .. .. .. ..
Nil, N i l .
REPORT.
In this quarter the water-supply has been derived from both sources, the infiltration gallery
and the deep well, and as was found on previous occasions the latter source of supply proves to
be very inferior to the former. The water from the infiltration gallery shows a very high total
count of microbes and contains excremental germs in as small a quantity as one-tenth of a cc.
The varieties of fœcal germs present are, however, not very objectionable in themselves and
seem to point to a considerable amount of natural purification having gone on in the water.
Chemically the water is very hard but otherwise satisfactory enough. The deep well water
shows all the objectionable features of the gallery water and some more special to it. It is also
v e r y h a r d a n d i n a d d i t i o n t h e f i g u r e s f o r a m m o n i a c a l a n d a l b u m i n o i d n i t r o g e n a r e t o o h i g h , a n d
give evidence of recent pollution. This evidence of pollution is amply sustained by the results
of the bacteriological examination. Here we have all the signs of recent extensive and most
objectionable pollution. The number of germs so high that it could not be properly estimated,
the presence of susceptible organisms of Class I, and a great variety of species represented. The
water is not safe for a drinking supply, and if as reported no other is obtainable, some form of
treatment should be adopted in the interests of the public health. Even if such treatment could
be applied only to that portion of the water to be used for drinking or culinary purposes, it
w o u l d b e s o m e t h i n g g a i n e d . I n t h e s a m p l e d r a w n f r o m F o u n t a i n N o . 1 0 ,
D r o u p a d i A m m a n
Street, there has been a great reduction of the total number of germs present, but unfortunately
this reduction has affected the fœcal organisms only in slight degree, and these remain, both in
quantity and kind, objectionably evident.