View report page

(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 borough is in supply with Thames-derived water to the west and
north with some water from wells at Hoe Lane, Hadley Road, and
Waltham Abbey pumping stations. The south-east portion in Edmonton
receives New River-derived water. From May to September the
supply to south-east Edmonton is supplemented by the interim output
from the new Coppermills Works. Part of the western boundary of
the borough is supplied by the Lee Valley Water Company.
The number of samples collected and the bacteriological and
chemical analyses of the supply from the above sources after treatment
are shown on the attached sheets. (Statistical Tables 31 and 32).
(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 running water collected from premises in the
distribution system and I set out below the information obtained over
the period 1st January to 31st December 1967 :

The above figures apply to the whole of the board's area but it
should be pointed out that the general characteristics of the water
are similar throughout the area so that the findings are applicable
to individual boroughs.
The regular system of examination for lead in water in domestic
premises will continue during 1968."
72