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15
The height of the new diving stage is lower than the cumbersome structure which it has
replaced, this being necessary in the interest of safety in view of the depth of the water (6ft.)
available.
Purification of Swimming Pool Water
The capacity of the large pool is 105,000 gallons and the small pool 50,000.gallons. The
total capacity of 155,000 gallons is continuously filtered and sterilised at the rate of 40,000
gallons per hour. Thus it will be seen that the total capacity of the pools is treated every four
hours.
Sterilisation is by chlorine and sufficient residual is maintained in the water at all times to
destroy all harmful bacteria which may be introduced by bathers. Frequent and regular tests are
taken daily to ensure that the water is maintained in accordance with the standards laid down by
the Ministry of Health and samples taken for analysis by the department of the Medical Officer of
Health have consistently indicated a highly satisfactory condition of chemical and bacterial
purity.
The water supply for all services except the drinking water is drawn from a bore hole 421
ft. deep.
Whereas the transmission of waterborne disease through contact with swimming pool water
is infinitely remote the problem of maintaining the pool surrounds and cubicles free from contamination
is difficult if not impossible while dressing accommodation is not apart from the precincts
of the po ols.
Unfortunately there is no practical solution to this problem in the large pool but the
accommodation in the small pool may well be separated by the construction of adj oining dressing
rooms to serve the small pool only. This scheme is under consideration by the Baths Committee.
The general appearance of the swimming pool water, more often than not, reflects the
condition or "quality" of the water. It is to be noticed that while the small pool consistently
indicates an almost crystal clear bluish colouring, the large pool presents rather uninviting
water with a greenish tinge and lacking sparkle. While the latter conditions often indicate a
sub-standard quality it is not so in our case.
The cause of this illusion is the glazed brick floor of the pool which has long since lost its
white relective properties.
Open Air Pool
The Lido becomes a popular resort at the height of the summer season and our patrons are
drawn from many parts of the North London Area, and as many as 5,600 persons have passed the
turnstiles in a single day.
The pool itself measures 165 ft. x75 ft. with depths varying from 3 ft. to6 ft. A recessed
diving area 60 ft. x 18 ft. with a depth of 10 ft. provides for a five metre diving stage with intermediate
firm boards and springboards at 1 and 3 metres.
The total capacity of the pool is 490,000 gallons and is continuously filtered and sterilized at the
rate of 90,000 gallons per hour. Samples taken for analysis by the department of the Medical
Officer of Health have consistently indicated a high standard of bacterial purity.
This establishment's water supply is drawn from the town mains.