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The water for both these swimming pools is obtained from the Metropolitan
Water Board and only needs to be changed annually. The method of purification is by
continuous circulation with a 3½ hour turn-over, with the water passing through
pressurised sand filters where pollution added by the bathers is removed. The water
is chemically treated and efficiently sterilised by chlorinating equipment.
Three samples of water were taking during the year from these pools and
submitted for chemical analysis. The reports showed that the water consistently
maintained a high degree of purity.
There is also a swimming bath, and open air one, in Victoria Park which
is provided and maintained by the London County Council.
The water for this pool is supplied by the Metropolitan Water Board and
its method of treatment is by pumping in free chlorine from steel cylinders at the
rate of 5 lbs. per hour under normal bathing conditions increasing to 8 lbs. per hour
when the number of bathers increases to 1,000 or over.
Pumping capacity is at the rate of 240,000 gallons per hour and the
capacity of the pool approximately 650,000 gallons. Complete water change takes
place not less than once every five hours.
Rapid filtration, continuous chlorination and aeration keep the water
clear, sparkling and attractive in appearance and of a good bacterial purity.
The water is changed annually and periodic chemical and
bacteriological examinations are carried out by the London County Council.
Medical Examination of Council's Staff

International Certificates of Vaccination and Inoculation
Arrangements continued during the year for the authentication by the
Medical Officer of Health of Certificates of Vaccination and Inoculation. These
certificates are required by persons proceeding abroad from this country and the
purpose of the authentication is to provide information to health authorities abroad