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Atechnical assistant who has practical experience of plumbing and drainage works is continuously
engaged in the inspection of house plumbing and drainage with a view to the detection of faults by which
the pollution of the surface water sewerage system may arise. The selection of areas in which the
techical assistant should work is often decided upon information from the Lee Conservancy Catchment
Board of pollution having been observed by their officers at surface water sewer exits. Tracing operations
are then carried out along the main sewer until the area from where the pollution arises can be isolated,
and individual premises inthatareaaresubjectedtodetailed examination. This work calls for systematic
and patient examination and the number of faults found is in no way indicative of the amount of work
involved.
During the year he inspected 3,844 premises. As a result of his findings official requests were
passed to persons having control of 100 specific premises for the necessary corrections to be carried
out. Thepublic health inspectors are responsible for seeing that this work is done and, where appropriate,
recommendations are made to the Council to take formal action under the Public Health Act 1936.
Water Supplies
A small area containing 106 premises between Great North Road and Aylmer Road is supplied with
water by the Lee Valley Water Company and the remainder of the Borough receives its water from the
Metropolitan Water Board. A report on the water supplied by Lee Valley Water Company was contained
in the report for 1966.
Dr. Windle Taylor, Director of Water Examination, Metropolitan Water Board, has kindly supplied
the following information regarding water supplied by the Board to Haringey during 1967:-
1. (a) The supply was satisfactory both as to quality and quantity throughout 1967.
(b) All new and repaired mains are disinfected with chlorine; after a predetermined period of contact
the pipes are flushed out and refilled; samples of water are then collected from these treated
mains; and the mains are returned to service only after results are found to be satisfactory.
The quality control from these laboratories is carried out by means of daily sampling from
sources of supply, from the treatment works or well stations, from the distribution system, and
through to the consumer. Any sign of contamination or any other abnormality is immediately
investigated.
(c) (i) The Board has no record of the number of structurally separate dwellings supplied in your
area, but the population supplied direct according to the Registrar General's estimates at 30th
June, 1967, was 253,455.
(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 higher elevation around Muswell Hill is in supply with River Thames-derived water. The
remainder of theBorough is in supply with New River—derived water. The locality of Northumberland
Park receives well water from Park Pumping Station. From May to September the supply to the
Tottenham area is supplemented by the interim output from the new CoppermilIs Works. 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
runningwater collected from premises in the distribution system and I set out below the information
obtained over the period 1st January to 31st December, 1967:-
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