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Public Cleansing.
In spite of increased mechanisation and consequent reduction in the
necessity for manual labour, the shortage of workers has caused difficulties in
operating the street sweeping and refuse collecting sections.
Refuse Disposal.
The new works at Charlton have been in operation some time and after
the initial " teething troubles " the works are operating satisfactorily.
The works have proved of considerable interest and have been visited by a
number of other Authorities and Organisations.
WATER SUPPLY
I am indebted to E. Windle Taylor, Esq., M.A., M.D., D.P.H., M.R.C.S.,
L.R.C.P., Barrister-at-Law, Director of Water Examination, Metropolitan
Water Board, for the following report:—
The source of the water is the River Thames abstracted at the Wraysbury,
Walton and Laleham intakes and stored in the Thames Valley reservoirs at
Staines, Littleton and Walton. After storage the water is treated at the
filtration works at Hampton.
The water is filtered by means of primary or rapid filtration followed by
secondary or slow sand filtration. All the water is finally chlorinated before it
leaves the works. In order to provide adequate contact to ensure complete
action by the chlorine a contact tank is provided at the works. The water is
treated by a method of controlled superchlorination by maintaining a fixed
residual of free chlorine after a given period of contact. The chlorination
process is now entirely automatic both in regard to changes in quality as well
as changes in quantity of the filtered water.
Samples of water are collected at all stages of the purification process at
least five times each week and analysed at the laboratories of the Metropolitan
Water Board.
All new and repaired mains are disinfected with chlorine before being
restored to supply and samples of water from them are tested to establish
that its quality is up to that normally supplied.
The supply is not plumbo-solvent.
The average results of chemical and bacteriological analysis of the water are
shown in Table No. 9.
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