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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.ER.) Line to Borough Boundary
with Finch ley.
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 safeguard 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.
Number of dwellinghouses supplied from public water mains:-
(a) direct to houses 43,010
(b) by means of standpipes Nil
Number of the population supplied from Public Water Mains:-
(a) direct to houses 154,800
(b) by means of standpipes Nil
Fluoride content of water supplies.
Colne Valley Water Company:- Fluoride Content - Nil.
Metropolitan Water Board:- Fluoride Content- 0.15 to 025 parts per million.
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