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(c) Bulk Supply.—This water is taken directly from the
Metropolitan Water Board Mains to make up the
deficiency in the yield from the Corporation's own
sources of supply.
(d) River water is pumped directly from the Thames and
distributed by a system of mains entirely distinct from
the domestic supply mains. It is used for flushing
sewers, watering streets and gardens, and for some
trade purposes.
A constant supply is given to all parts of the Borough with the
exception of the upper parts of the houses situated on the highest
parts of Richmond Hill—here the cisterns are filled in the morning
by increasing the pressure in the pumping main for about an hour.
The average consumption of water per head per day for all
purposes is about 36 gallons and is an increasing quantity in spite
of a continuous system of waste detection. The increase appears
to be due almost entirely to a growing carelessness in the use of
water.
The total consumption from the various sources for the twelve
months ending March 31st, 1921, was: —
Gallons.
Deep Wells 66,348.000
Petersham Well 138,738,000
Metropolitan Water Board 201,216,000
Total Domestic Water 406,302,000
River Water 64,161,000
Total Consumption 470,463,000
Drainage and Sewerage.
All house dr???s discharge into the sewers. The construction of
drains for new buildings is upervised by the staff of the Borough
Surveyor, after plans for the erection of new buildings have been
approved by the Highways Committee,