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WATER SUPPLY
I am indebted to Dr. E.Windle Taylor, Director of Water Examination for
the Metropolitan Water Board who kindly supplied the following reports:-
"The supply was satisfactory both as to quality and quantity
throughout 1971.
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.
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 1971 was 184,435.
No houses were permanently supplied by standpipe.
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.
The supply was derived from the following works and pumping
stations:-
River Thames - derived from Ashford Common, Hampton and
Surbiton works.
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.
On account of their hardness content and alkaline reaction the
Board's river and well water supplies are shown to be not plumbosolvent-
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 "
B.19