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9
SANITARY CIRCUMSTANCES OF THE DISTRICT.
Water Supply.
Water is supplied by the Metropolitan Water Board, and is
of excellent purity.
Most of the houses now have a supply from the main, and of
sufficient quantity.
Rivers and Streams.
Apart from the Thames there are few watercourses in the
Borough, and the only trouble experienced is in connection with
the ditches in the southern end of the Borough in the region of
the Docks.
Drainage and Sewerage.
The? drainage of the Borough is on the separate system, the
surface water flowing to the water course and the sewage to the
Council's own Works and Pumping Station. The sewage at
first passes through a screening chamber into a pump-well beneath
the engine house, from which it is pumped into precipitation tanks,
where it is treated with lime (9 grains to each gallon of se'wage).
There are two continuous-flow precipitation tallies. Only one tank
is in use at a time during dry weather. The effluent from these
tanks is treated with Ferric sulphate in liquid form (4. 7 grains per
gallon of sewage). It then flows into one of the three quiescent
tanks and is allowed to rest for two or three hours, and afterwards
pumped on to the bacteria beds. The effluent from the bacteria
beds flows through a humus basin to allow suspended matter to
settle, and is finally discharged into the River Roding, a tidal
tributary of the Thames. The effluent is frequently analysed, and
no complaints have been made during the year as to its character.
It contains very little trade effluent.
Closet Accommodation.
This consists of water closets-
Scavenging.
The collection of House Refuse is carried out weekly and is
carted partly by Electric Motor Vans, and otherwise by contract
with Horse Carts, to the Destructor which adjoins the Sewage
Disposal Works. The heat of combustion arising therefrom is
applied to the generation of steam required for the Works.
Where a dustbin is not provided a notice is served upon the
owner of the property to supply one.