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66
SECTION D
SANITARY CIRCUMSTANCES OF THE AREA
Water Supply
I am indebted to Dr. E. Windle Taylor, Director of Water
Examination. Metropolitan Water Board for the following report
on the water supplied to the Borough.
" The supply to the Lambeth area has been satisfactory
both in quantity and quality during the year 1959.
The water is all River Thames, derived. It is stored
in the Board's reservoirs at Staines, Laleham and Walton and
treated in the Board'sworks at Hampton, Surbiton and Walton.
The method of purification is by storage, filtration and
terminal chlorination and contact tanks are in operation at
Hampton and Walton to ensure efficient disinfection of the
water.
Samples are collected on five days in every week and
more frequently if required, from each stage of the purification
process and in the distribution system. Tests include
physical, chemical and micro-biological examination of the
water.
All new and repaired mains are chlorinated before being
restored to services and samples of water from them are
tested bacteriologically to ensure that its quality is up
to that normally supplied.
The water supplied to the Borough of Lambeth is not
plumbo~solvent. "
During the year samp]es of water supplied by the Metropolitan
Water Board to the Borough of Lambeth were taken for chemical and
bacteriological examination.
The number of samples taken during the year from the Thames
Valley Southern Group for chemical examination was 156 and the
number taken for bacteriological examination 1748.
The average results were as follows : -