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12
SECTION C.
SANITARY AND ENVIRONMENTAL CIRCUMSTANCES
WATER
There was no need to extend new sources of public water supply
in the Council's area during 1949, but service mains were necessarily
laid on the L.C.C. estate at St. Paul's Cray.
I am indebted to the Director of Water Examination, Metropolitan
Water Board—Lt.-Col. E. F. W. Mackenzie, for the following
statement.
"The supply to the district of Chislehurst & Sidcup has been
adequate at all times in 1949 and is derived from the following seven
wells: Orpington, North Orpington, Shortlands, Eynsford, Bexley,
Wilmington and Darenth, together with Thames-derived filtered water
via Shortlands.
Bacteriological analyses of these sources of supply are made at
least five times a week and consistently satisfactory results have been
obtained. Chemical analyses of the supplies are made at frequent
intervals.
All supplies are treated with chlorine on the works, but any
excess remaining after a period of contact is removed completely or
reduced to an amount that will not be perceptible to consumers.
Tanks have been installed at North Orpington, Wilmington and Bexley
to ensure an adequate contact of chlorine with the water ; tanks at
other well stations are planned or are in the course of construction.
All new and repaired mains are disinfected with chlorine before
being restored to supply and samples of water from them are analysed
to establish that it is up to the normal standard of quality expected
in the distribution system. None of the supplies is plumbo-solvent.
We have no information with regard to the proportion of the
total number of dwelling houses and population in Chislehurst &
Sidcup which are supplied from the above-mentioned sources. All
the houses are supplied directly and not by means of stand-pipes."
Given in appendix 5 are the results of chemical and bacteriological
analyses of the various supplies to Chislehurst & Sidcup during 1949.
There are 18 isolated premises where water supply is dependent
upon well supply. Of these 18, 5 are serving 10 dwelling houses.
They are kept under supervision and the 31 samples taken for chemical
analysis and 50 for bacteriological analysis, proved satisfactory.