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SECTION 2
ENVIRONMENTAL HEALTH OF THE BOROUGH
WATER
There are three sources of supply in the Borough. The Northolt North, Northolt
South, Greenford North, Greenford Central and Greenford South Wards, most of
Perivale Ward and part of Hanger Hill Ward are supplied by the Rickmansworth
and Uxbridge Valley Water Company with the exception of four roads (in part) in
the Perivale Ward and one road (in part) in the Hanger Hill Ward which are served
by the Colne Valley Water Company. The remainder of the Borough is supplied by
the Metropolitan Water Board. These supplies are not subject to plumbo-solvent
action and have been satisfactory both in quantity and quality. Water from public
mains is supplied to 54,144 dwellings with a population of 183,151.
Ten samples were taken from supplies derived from wells at five factories in the
Borough. In these factories water is obtained from deep borings ranging in depth
from 300—600 feet. Of these 10 samples, 8 were found to be of satisfactory quality,
but two samples taken late in December were of doubtful quality. Further investigations
in these cases were continuing early in 1963.
The sixteen samples of water taken from supplies provided by the Metropolitan
Water Board and the Rickmansworth and Uxbridge Valley Water Company, were
from houses in multiple occupation where water for drinking and domestic use is
derived from storage tanks and not direct from the rising main. In each case where
doubtful or unsatisfactory results were obtained it was apparent that storage tanks
had become contaminated and required thorough cleansing and covering. In one
case investigations were still in progress at the end of the year, and in the other case
the owner was considering estimates for making connections direct from the rising
main for the supply of water for drinking purposes.

DRAINAGE AND SEWERAGE
The soil sewerage from the district flows to the West Middlesex Drainage Works
at Mogden. Surface water finds its way out of the district by the various water courses.
There are still 21 premises not connected to the Council's sewers, mainly because
they are in areas not yet served by a main sewer.
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