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WATER SUPPLY
1 am indebted to Dr. E. Windle Taylor, Director of Water Examination for the
Metropolitan Water Board, for the following report on the condition and supply of
water to the Borough during 1971:—
1. (a) The supply was satisfactory both as to (i) quality, and (ii) quantity
throughout 1971.
(b) All new and repaired mains are disinfected with chlorine; after a predetermined
period of contact the pipes are flushed out and refilled; samples
of water are then collected from these treated mains; and the mains are
returned to service only after the analytical results are found to be
satisfactory.
The quality control from these laboratories is carricd out by means
of daily sampling from sources of supply, from the treatment works or
well stations, from the distribution system, and through to the consumer.
Any sign of contamination or any other abnormality is immediately
investigated.
(c) (i) The Board has no record of the number of structually separate dwellings
supplied in your area, but the population supplied direct according to the
Registrar-General's estimates at 30th June, 1971, was 264,800.
(ii) No houses were permanently supplied by standpipe.
(d) No artificial fluoride is being added, and where the fluoride content is
indicated in the analyses it represents the naturally occurring fluoride in
the water.
2. (a) The supply was derived from the following works and pumping stations:-
River Thames-derived water from Hampton, Kempton Park, Surbiton and
Walton works.
Well water from Bexley, Darenth, Deptford, and Wilmington Pumping
Stations.
No new sources of supply were instituted and there were no changes
to the general scheme of supply in your area.
The number of samples collected and the bacteriological and chemical
analyses of the supply from the above sources after treatment are shown on
the attached sheets.
(b) On account of their hardness content and alkaline reaction the Board's
river and well water supplies are shown to be not plumbo-solvent. It should,
however, be appreciated that all types of water pick up varying amounts
of metal from the material of water piping particularly when it is newly
installed; this applies to copper, zinc, iron and also to lead.
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