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28
SECTION C.
SANITARY AND ENVIRONMENTAL
CIRCUMSTANCES OF THE AREA.
WATER SUPPLY.
A number of samples of water from the mains of the
Metropolitan Water Board were taken by the Department. Six
were submitted for bacteriological test and seven were analysed to
ascertain the chemical constitution.
All were found to be satisfactory for drinking purposes.
At the end of the year there were 2 dwelling houses with
water supplied from one private well.
I am indebted to the Clerk and the Director of Water
Examination of the Metropolitan Water Board for the following
information on the supply of water to the Urban District during
the year 1954.
" The supply to the district of Chislehurst and Sidcup has been
adequate at all times in 1954. although there has been some reduction
of pressure due to heavy consumption during certain periods
of peak demand in the vicinity of Chislehurst Common. No new
source of supply has been instituted. Water is obtained from the
following seven wells; Orpington. North Orpington. Shortlands.
Eynsford. Bexley. Wilmington and Darenth, together with Thamesderived
filtered water via Shortlands pumping station.
Bacteriological analysis of samples of water at these various
sources of supply are made at least five times a week and consistently
satisfactory results have been obtained from samples of
water passing into supply. Chemical analyses of the samples are
also made at frequent intervals.
All supplies are treated with chlorine at 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 all the above well stations to ensure
an adequate period of contact of chlorine with the water.
There have been no extensions to trunk mains but various
lengths of service mains have been laid within the district.
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 supplies is
plumbo-solvent.
Appended are the results of chemical and bacteriological
analyses of the various supplies to Chislehurst and Sidcup during
1954 before and after treatment."