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18
SANITARY CIRCUMSTANCES OF THE AREA.
WATER.
Weekly bacteriological reports received on samples of water
taken in different parts of the district and analysed at their
laboratories by the Colne Valley Water Company have all proved
satisfactory, as have also the quarterly samples submitted by the
Council for detailed chemical and bacteriological analyses.
The supply of the Rickmansworth and Uxbridge Valley Water
Company again failed on one occasion. Since that time it is understood
that, at least as a temporary measure, the premises in this
district previously served by this Company are to be supplied by
the Colne Valley Company.
WELLS.
The possibility of pollution of the London underground water
from disused wells and borings of water obtained from the chalk
over London has increased because of the constantly increasing
number of borings through the protective clay stratum and because
of the lowering of the water level in the chalk. Such borings pierce
the impermeable clay cover after penetrating the superficial covering
of sands and gravel which often contain foul water. So long as the
bore hole is in use, care is taken to exclude surface water ; but
many such borings are abandoned and their lack of maintenance
causes a risk of polluted surface water reaching the chalk. The
following are particulars of wells in this district:—
Sinclair's Joinery Works, Greenhill Crescent.—An artesian well
over 100 feet deep; not now used.
Brazier's Farm, Kenton Lane.—A metal barrel sunk 250 feet
deep; the usual supply about 15,000 gallons per hour.
Pattison Cole, Stanmore Hill.—Two disused brick-built wells,
one (open) situated in the factory grounds, the other (sealed over)
to the rear of the property to the north-west of the factory.
The City Cottages, Harrow Weald.—A well covered with stone
slabs; a pump is connected.
The Fountain, Church Road, Stanmore.—A well in the forecourt
of a public house; now disused, being covered with stone
slab.
Kodak Ltd., Wealdstone.—Four disused wells, approximately
100 feet deep, lined to 70 feet. Now sealed. Two artesian wells
in use.
Garage, West Hill, Byron Hill.—A shallow brick well; water
used for car washing.
Greenhill Laundry.—One artesian well in use.
Water-works, Bessborough Road.—Recently acquired by the
Colne Valley Water Company from the Harrow Urban District
Council.