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APPENDIX I.
A SUMMARY OF THE RESULTS OF EXAMINATION OF THE MUNICIPAL
WATER-SUPPLIES IN THE PRESIDENCY FOR THE YEAR 1920.
Ad ō ni .—The water of the Ramjella spring which is used as an augmenting source wa
s o f a v e r y f a i r q u a l i t y . T h e t a n k w a t e r w a s r i c h i n o r g a n i c m a t t e r a n d t h e s a n d f i l t e r s d i d n o t
effect any improvement.
Berhampur.—The water of the tank showed an excess of organic matter. The filters.
functioned more satisfactorily this year, but the water suffered a good deal in transit, the
service reservoir and pipeline having evidently been fouled. The beneficial effect of filtra
¬ t i o n w a s n u t t h e r e f o r e , m a n i f e s t i n t h e w a t e r a s s u p p l i e d t o t h e c o n s u m e r .
Bezwada .—The water-supply was of a very fair quality at both the examinations but at
the pumping station the water showed an excess of free ammonia, due to some local disturb-
ance in the gallery.
Chidambaram .—In January, the raw water of the Rajan channel was found to be of a
very fair quality. The filtrate was at least five times worse than the raw water and the dose
of alum was absolutely inadequate. When the Filter Beds Committee inspected the water
works they discovered that along with other defects, insufficiency of the coagulant was.
responsible for the bad results. In February, another examination was conducted, the dose
of alum having been slightly increased and the results were found to be better, though not
up to the mark. Laboratory experiments with the raw water showed that flocculation
commenced only when 4 grains per gallon had been added. In August, when the supply was
examined for the third time, there was a noticeable improvement as regards the bacterial
flora but the organic matter present in excess in the raw water remained practically unaltered.
after filtration. A further increase in the dose of alum was indicated.
Cocanada .—In November 1919, poor filtration results were recorded ; the examination
in May of the present year revealed a tendency towards improvement but in. November 1920,
there was a marked falling off and the effect of sand filtration was not apparent.
Conjeeveram. — T h e r e w a s a f l u c t u a t i o n i n t h e q u a l i t y o f t h e s u p p l y ; i t w a s v e r y g o o d i n
April, but not so good in October.
Coonoor .—The water of the Bandami reservoir showed at both examinations an excess of
organic matter of vegetable origin. In distribution the water improved in quality and was
found potable.
Cuddapah. —The infiltration gallery was found to be functioning fairly well.
Dindigul.—The supply was examined thrice during the year ; at the first examination
there was a slight deterioration over the previous ones, but at the subsequent examinations
the water-supply was in very fair order. The deep well which occasionally augmented the
supply in former years, was not used this year.
Ellore.—The water of the Kistna canal showed evidence of gross pollution. Storage
improved the water to a marked extent. The effect of sand filters was not manifest in the
water as supplied.
Erode.—The results of both examinations showed that there was only a very slight
improvement in the quality of the water as a result of filtration and that sufficient alum had
not been used for coagulation.
Gudiyā ttam.— T h e c o n d i t i o n o f t h e w a t e r s u p p l y a t t h e f i r s t e x a m i n a t i o n w a s f a i r , b u t a t
the second there was deterioration. The quality of the water suffered further in transit as a
result of a dirty pipeline.
Guntū r.— At both examinations there was a deterioration over the results of 1919.
Kodaikānal.—At the first examination there was a definite allround improvement over
the previous years' results. But in September, as a result probably of continuous rain for
three days prior to the date of sample collection, there was a marked deterioration in the
quality of the water.
Kumbakōnam.— During the June examination the borehole yielded as usual water of
great bacterial purity with a phenomenally high figure for free ammonia. At the December
examination, there was a marked deterioration from the bacteriological point of view. The
very heavy and incessant rains that fell during the months of October and November
evidently accounted for this deterioration.
Kurnool.—The filtered water from the outlet of sand filters was of a passable quality at
both the examinations although it did not come up to the standard of a proper sand-filter
filtrate. In distribution the water deteriorated.
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