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The average hardness of samples of water (Parts/Million)
taken during the year is:-
Total hardness 247
Permanent hardness 74
Temporary hardness 173
All new and repaired mains are chlorinated before
being restored to use and samples of water from them are
tested bacteriologically to ensure the purity of the water.
SWIMMING POOLS
Ruislip Lido
Thirty-five samples of water were obtained and sub
mitted to the Central Health Laboratory, Colindale, for
bacteriological examination.
Private Swimming Pools
Private swimming pools in the District were regularly
inspected and samples obtained, all of which were satis
factory.
FOOD HYGIENE REGULATIONS, 1955
During the year the following works have been carried
out under the above Regulations at food shops, restaurants
and premises where food is prepared, stored or sold:
New Wash Hand Basins 3
Hot water installed 3
Premises cleansed and re-decorated 7
New W.C.'s 1
W.C.'s re-decorated 3
Draining boards renewed 2
New kitchen equipment provided 2
New sinks 2
New table surfaces 2