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SECTION D
SANITARY CIRCUMSTANCES OF THE AREA.
WATER SUPPLY.
The Borough has a dual source of supply. The
Northern part is supplied by the Colne Valley Water
Company and the Central and Southern portion by the
Metropolitan Water Board.
The boundary between the two areas is formed by the
Borough Boundary at the Welsh Harp Reservoir , Pollard
Road, West Hendon Broadway, Station Road Hendon, to
Hendon Station, British Railways (Midland Region) Line
to junction of Eastern Region Line, British Railways
Eastern Region (formerly L.N.E.R.) Line to Borough
Boundary with Finchley.
The Colne Valley water is derived from deep wells
sunk into the chalk and before distribution to the consumers
the water is under constant supervision of a
chemical and bacteriological staff which carries out
examinations in modern laboratories situated at the works.
The water supplied by the Metropolitan Water Board
is selected Thames water which has been subjected to
purification by storage in which time it is freed of the
bulk of organisms It is filtered through rapid and then
slow filters, attaining a degree of purity which compares
favourably with the general supplies in Great Britain,
but as a further safe-guard terminal chlorination is
applied which ensures a first-class water in every respect.
Samples of water are examined bacteriologically,
chemically and for taste and other special purposes on
every working day.
The supply to all areas was satisfactory in quality
and quantity.
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