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37
Sewer Treatments.
Treatments of sewers were carried out on two occasions. The co-operation of
the Borough Engineer's staff in relation to these treatments was appreciated.

Water Supplies.
The Metropolitan Water Board is responsible for all main water supplies in the
Borough and samples of water, as supplied by the Board, were taken during the year
and found to be satisfactory. Thanks are due to the Metropolitan Water Board
for its co-operation and whole-hearted assistance during the year.
Upon a complaint being received in respect of numerous organisms infesting a
storage tank in one of the Council's prefabricated bungalows, the case was referred
to the Metropolitan Water Board who, after the receipt of a report from the Board's
representative, reported that the organisms had been identified as "spring tails"
(Isotoma Palustris). The cistern in question was situated above the hot water
system. The particular feature in this case was the fact that partially submerged
in the water was a heavily gummed label, which was covered with "spring tails,"
and it appeared from the results of the Board's investigations that the label provided
most of the nutritional needs for their multiplication. The cistern was cleaned out,
disinfected and properly covered, and no further trouble has arisen.
The number of bore holes, including wells known to exist in the Borough is 28,
18 of which have been abandoned, leaving 10 bore holes capable of being used. One
of these was out of commission during the year, and samples from the remaining 9
were taken for chemical and bacteriological examination. From the reports received,
and as none of the water from these bore holes is used for dietetic purposes, the
position in regard to underground water in the Borough is satisfactory.
In accordance with the requirements of Section 95 of the Public Health (London)
Act, 1936, 30 applications for Water Certificates were received and 30 Certificates
were issued in respect of 019 premises.