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116
WATER SUPPLY
I am indebted to Dr. E. Windle Taylor, Director of Water Examination,
Metropolitan Water Board, for the following report on the water supplied by
the Board to the London Borough of Lambeth during the year
I refer to the Department of Health and Social Security Circular No. 1/73
and have pleasure in giving below and on the attached sheets the required information
as far as it relates to the Board's direct supply to your administrative area
and its several parts. You will understand that this information does not relate to
private supplies or to supplies derived from or through other Water Undertakings
(if any).
1. (a) The supply was satisfactory both as to (i) quality, and (ii) quantity
throughout 1972.
(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 carried 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 structurally separate
dwellings supplied in your area, but the population supplied
direct according to the Registrar-General's estimates at 30th
June, 1972, was 301,686.
(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 the Thames Valley group of
works.