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25
The water supply to the whole of the Borough has been
satisfactory both in quality and quantity.
No samples of raw water have been examined but three
samples for bacteriological examination and four samples for chemical
analysis have been taken of drinking water from dwellings where there
has been a complaint. All the samples were found to be satisfactory.
Some of the water supplied by the Metropolitan Water Board
has a plumbo solvent action and the 38th report by the Director of
Water Examination gives details of an experiment conducted between
1952 and 1958 using a 60 foot coil of lead piping. The report states
"These results show that after the pipe had been in use for about two
months, the amount of lead taken up by river-derived water left
standing overnight was considerably reduced, and that after one year,
the amount taken up overnight was reduced to a more or less constant
figure of about 0.3 mg./1. However, even with a pipe that has been
installed for several years, it is still advisable to run the stagnant
water to waste first thing in the morning to obtain an entirely leadfree
water."
No form of contamination of the water supply was found which
require any action by the Council.
All the dwelling-houses in the Borough have a piped supply
direct to the houses and none is supplied by stand-pipes.
Public Swimming Baths
The public swimming baths are situated in Finchley Road and
consist of three pools. The Fairfax Pool has a capacity of 100,000
gallons and is open throughout the year. The Goldhurst Pool has a
capacity of 90,000 gallons and is open during the summer season only
from April until September. The Youth Pool holds 45,000 gallons
and is open all the year.
The water for all three pools is obtained from the Metropolitan
Water Board. There is no private well or other supply.
The water for all the swimming baths is subjected to a
process of continuous filtration through pressure filters and the water
is chlorinated in order to maintain as nearly as possible a concentration
of two parts of chlorine per million parts of water.