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(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,
1970, was 284,690.
(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 via Hampton, Walton
and Surbiton Works, and some well water from Honor Oak and
Merton 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 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.
INFECTIOUS DISEASES
The requirements relating to the notification to the Medical Officer of
Health of certain diseases are contained in Sections 47 to 49 of the Health
Services and Public Health Act, 1968 and the Public Health (Infectious Diseases)
Regulations 1968, and in addition to food poisoning the following infectious
diseases are required to be notified to the Medical Officer of Health:-
Acute encephalitis
Acute meningitis
Acute poliomyelitis
Ophthalmia neonatorum
Paratyphoid fever
Plague
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