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57
(a) Well Water.
Of the 28 bore holes or wells known to exist in the Borough 19 continue to be
unused being effectively sealed. Six of the remaining wells are out of use.
Three samples were taken for bacteriological examination and three for chemical
analysis respectively, the results indicating that the water could not be considered
free from pollution in one case. As the water from these sources is used solely for
industrial purposes, no objection was raised to its use.
(b) Water Supplies - Miscellaneous
One sample of sub-soil water was taken for chemical analysis The result
indicated gross sewage contamination.
(c) Swimming Bath Water
82 samples were taken for bacteriological examination and all but three were
reported as being satisfactory
14 samples were taken for chemical analysis and a satisfactory report was
received in each case
By courtesy of the Chief Superintendent and Engineer of Baths and Wash-Houses,
the following information is included in this year's Report.
'There are eight swimming pools at present under the control of the Council and
included is the newly reconstructed and modernised Hornsey Road Baths establishment,
which will re-open early next year. This pool has been built to national standards,and
is one of the finest pools in the country with up-to-date amenities.
A modern boiler house has also been installed with electronically controlled
equipment and machinery to ensure that the building and water will be maintained at
the required'temperature.
The Metropolitan Water Board supply the water for this bath
The method of treatment for purification is by chemical dosage: alumina ferric is
the coagulant used to fulfil the function of forming a film on sand Soda ash is the
alkaline salt to counteract acidity A pH value of between 7.4 and 7.6 has proved most
satisfactory to the swimmers using these baths
Aeration is maintained by means of an air compressor.
Sterilisation: Chlorine gas is used a residual of 0,5 to 0,75 p.p m being
strictly adhered to. In the summer months when heavy loads are to be expected, it is
kept at 0.75 p.p.m.
The frequency of changing the bath's water is governed by the flow through the
filters which in the case of these establishments is approximately once every four
hours In the summer months when the baths are open for 12 to 14 hours daily, a
complete turnover of three times per day is necessary."
Eight samples of the water at Highbury Fields Open Air Swimming Pool, which is
controlled by the London County Council, were taken during the summer season for
bacteriological examination. :The results, included in the figures given at the head