View report page

dwellings supplied in your area, but the population supplied direct
according to the Registrar General's estimates at 30th June 1967, was
300,720.
(ii) No houses were permanently supplied by standpipe.
(d) No fluoride was 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 via Hampton, Walton and Surbiton. Honor Oak well.
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
in the following tables.
(b) The Board's river and well sources have not been considered to have a
plumbo-solvent action, on account of their hardness content and alkaline
reaction. It should, however, be appreciated that all types of water pick
up varying amounts of metal from piping, particularly when it is newly
installed; this applies to copper, zinc, iron and also lead.
Tests for lead have been carried out in connection with chemical
analyses of samples of running water collected from premises in the
distribution system and I set out below the information obtained over the
period 1st January to 31st December 1967:

The above figures apply to the whole of the Board's area but it should be pointed
out that the general characteristics of the water are similar throughout the area so
that the findings are applicable to individual Boroughs.
The regular system of examination for lead in water in domestic premises will
continue during 1968.
D
49