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18 Sanitary Inspection of the Borough
Water Supply—Cutting-off Notices
During the year, 99 notices with respect to 149 premises were
received from the Metropolitan Water Board stating that the supply
had been withdrawn.
In 32 premises the water supply was cut off for non-payment
of rates, 99 because of defects in the service, and in 18 the premises
became vacant.
Rodent Control
Energetic measures for rodent control continued throughout
the year, the system followed being that of prebaiting laid down
by the Ministry of Agriculture and Fisheries.
2,170 rat and mice complaints were received during the year.
Following is a summary of the work of the rodent operatives:
No. of operatives' visits to premises 14135
No. of premises prebaited and treated with poison 1506
No. of premises prebaited and found not troubled 306
No. of premises investigated and found not troubled 302
No. of prebaits laid 43194
No. of poison baits laid 10673
No. of drains tested by Sanitary Inspector 410
No. of drains found defective 258
No. of rats estimated killed 13326
There were eight rodent operatives and one clerk engaged on
.'odent control duties during the year under the supervision of a
Sanitary Inspector.
Swimming Baths and Bathing Pools
There are four public swimming bath establishments and one
open air swimming pool belonging to the Council, one open air
swimming bath owned by the London County Council, one public
swimming pool privately owned, and a number of private bathing
pools in the Borough. The Queensmere pond on Wimbledon
Common has also for many years past been a recognised bathing
pond.
In four of the Borough Council's swimming baths, the water
is purified by a process of continuous circulation through a filtration
plant whereby the whole of the water is dealt with every three
to four hours and chlorinated automatically during its circulation
from the filtration plant to the bath. In the other bath belonging
to the Council, each bath is emptied of water as often as necessary
and refilled with fresh water, which is continuously circulated and
chlorinated automatically the whole time the bath is in use.