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98
During the course of the year bacteriological samples
were taken from these baths on 23 occasions. In addition to
this, numerous visits were made when the chemical content of
the pools was checked by means of a Lovibond comparator.
The overall standard has been satisfactory with only two
lapses during the year. The learners' pool has been maintained
at breakpoint chlorination with the exception of a period
when the baths were closed in April and shortly after in early
May. There was only one occasion when bacterial contamination
was excessive in this pool due to heavy use, inadequate chlorination
and pollution by the bathers. The water supply to the
slipper bath is constantly flowing from the mains, and the
washing and toilet facilities attached to this bath are
satisfactory.
Heavy pollution occurred at the outlet in No. 1 Pool in late
May/early June due, it was thought, to insufficient circulation.
These corners were hand dosed with additional sodium hypochlorite
and despite the bath being closed for one day in the middle of
this period it was nearly four weeks before conditions were
entirely satisfactory. During this time chemical readings
gave satisfactory results, the water was maintaining a good
colour and there were no complaints from bathers of smarting eyes.
Provision was made in the financial estimates for the installation
of breakpoint chlorination equipment for Nos. 1 and 2 Pools.
The SUrbiton Lagoon, situated in Raeburn Avenue, Surbiton, is
an open air pool 165 feet long and 90 feet wide, with a depth of
three to nine feet. There is also a paddling pool for small
children.
The water is from Metropolitan Water Board mains and is
treated by continuous pressure sand filtration, sterilisation by
breakpoint chlorination and oxygenation over an ornamental cascade.
Periodical samples of water are taken by the Borough Engineer
and Surveyor and the plant is adjusted as necessary. In addition
Samples were taken on five occasions by the Health and
Welfare Department for bacteriological examination all of which
proved to be satisfactory.
(b) School baths. One private school has a small swimming
bath which is used only by scholars and staff. Sterilisation is
by hand dosing with chlorine and changes of water as necessary.
Samples were taken on three occasions during the summer when this
open air pool was in use. These were satisfactory with the
exception of the final occasion at the end of term when the
dosing had not been fully carried out at the time of inspection
but this was immediately rectified.