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38
"The water supplied to the Ilford area by the Board is derived
from Wanstead Well and River Lee-derived water from Lee Bridge
Works in varying and unpredictable proportions."
The fluoride content of these supplies is as follows:—
Wanstead Well 0.55 - 0.6 of a milligramme per litre F.
River Lee derived 0.3 - 0.45 of a milligramme per litre F.
"The water supplies have been satisfactory in both quantity
and quality during the year. There were no changes in the general
scheme of supply and no trunk mains were laid but the length of
new service mains laid in the Borough during 1964, was 276 yards.
All new and repaired mains are chlorinated before being restored to
supply and samples from these are tested to confirm that the quality
of the water in them is up to the standard normally supplied."
A total of 936 samples was submitted to chemical and/or
bacteriological examination.
The water provided to the remainder of the Ilford district by the
South Essex Waterworks Co. is obtained from the River Stour and from
deep wells at Mill Road, Grove Road and Roding Lane.
Mr. P. Gordon Spencer, General Manager and Chief Engineer to South
Essex Waterworks Co., has kindly supplied me with the following information.
"During 1964 over 4,055 chemical, bacteriological and biological
examinations were made at the Langham Laboratory, and all water going
into supply was reported as wholesome. In addition samples were examined
for radioactivity.
Samples from the wells situated in the Company's area of supply
were taken and analysed weekly and all were likewise reported on as
above; in addition, samples were taken weekly from houses in various
parts of the supply area for bacteriological examination and they were
invariably perfectly satisfactory.
A supplementary supply of water was obtained from the Metropolitan
Water Board during the months of:—