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58
Water Supply.
The public water supply is from the mains of the Barnet
District Gas and Water Company. The water is derived
from deep wells in the chalk, and is of a very high degree of
purity. The supply is constant, and the Company's Engineer
informs me that the average quantity of water supplied to
residents in this district is about 25 gallons per head per day.
The Company have recently constructed a new Pumping
Station at Tyttenhanger, and the public water supply may
be regarded both for the present and for the future as satisfactory
in quantity and quality. The only complaint one
gets is that the water is rather hard.
Periodical analyses of the water were made during the
year. Samples are taken from the mains in various parts of
the district. All the samples shewed a high degree of organic
purity.
House Drainage.
A great many house drains were entirely re-constructed
and a large number repaired. This work was oarried out
under the supervision of the Sanitary Inspectors, and
thoroughly tested before being passed. A block plan of each
new drain is prepared by the Inspector upon the completion
of the work, and this is filed and kept for future reference.
This system of keeping graphic records has been in operation
for some years, and constantly proves its value. Increasing
use is being made of heavy cast-iron pipes in place of stoneware,
and there can be no doubt of the advantage of such
construction. A detailed statement of the work done is set
out in the Inspector's Report.
Sewerage.
The drainage of the district is nominally on the "dual"
system, but the Council's Engineer has found that in past
years a number of surface water connections have been made
to the soil sewers, and there is also a considerable influx of
sub-soil water into some of the older ones. The flow of sewage