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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 54,943 dwellings with an estimated population of 182,620.
Twelve 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 to 600 feet. Of these 12 samples, 11 were found to be of satisfactory quality.
The remaining sample was of doubtful quality owing to the presence of a small count
of non-faecal coliform organisms, but this sample was taken late in the year and
was being further investigated early in 1965.
The 12 samples of water taken from supplies provided by the Metropolitan Water
Board were from seven premises from which complaints had been received or where
the quality of water supplied from storage tanks was under suspicion. Two of these
samples were unsatisfactory owing to the presence of coliform organisms of the nonfaecal
type. In one case a defective service pipe was renewed and in the other case a
storage tank was thoroughly cleansed and covered and repeat samples taken later
were found to be satisfactory.

DRAINAGE AND SEWERAGE
The soil sewerage from the Borough is all eventually treated at the West Middlesex
Drainage Works at Mogden. Surface water in most parts of the district is drained in a
separate system and is discharged largely to the River Brent and to other water courses.
There are still 21 premises not connected to the Council's sewers, but these premises
are mostly situated in those small areas of the Borough not yet served by main sewers.
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