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29
Swimming Baths and Pools.
There is only one swimming bath in the district to which the
public are admitted, and this is situated at Darrick Wood, Lovibonds
Avenue, Orpington.
It is owned by the Kent Education Committee, but is operated
by Orpington Urban District Council in conjunction with the Committee
under a financial arrangement during the summer months,
whereby, although it is normally reserved for the use of school
children, the general public are admitted at certain times. The
charge for admittance is 1/- for adults and 6d. for children.
It is an indoor swimming bath covered with white glazed tiles.
The water, supplied by the Metropolitan Water Board, is heated,
chlorinated and then filtered continuously, this cycle taking eight
hours.
Three visits of inspection were made during the year by the
District Public Health Inspector and a sample of the water taken for
analysis proved to be satisfactory. The Analyst reported as follows :
Physical Characters. Colour—Nil.
Odour—Chlorine.
Deposit—Nil. pH 7.52 (Results expressed in parts per million).
Chemical Examination.
Solids in suspension (Dried at 180°) 1,030
„ „ „ After ignition 820
Chlorides calculated as Chlorine 295
Bicarbonate Alkalinity 70
Total Hardness 240
Free and Saline Ammonia (as Nitrogen) 0.16
Albuminoid Ammonia (as Nitrogen) 0.8
Nitric Nitrogen (as Nitrates) 8
Nitrous Nitrogen (Nitrites) 0
Oxygen absorbed in i hour at 26.7°C 0.36
„ „ „ 4 hours at 26.7°C 1.7
Toxic Metals .... .... .... .... .... .... .... not detected
Free and combined residual Chlorine on receipt 0.75
Bacteriological Examination.
Number of Colonies developing upon Agar :
(a) in 24 hours at 37°C 1 per ml.
(b) in three days at 22°C 13 per ml.
Presumptive Coliform Count 0 per 100 ml.
Including faecal coli .... .... .... .... .... .... —per 100 ml.
OPINION : FIT FOR USE.
Verminous Conditions and Uncleanliness.
No cases of unclean premises were found during the year, but
twenty-nine verminous premises were dealt with by the Department's
Disinfector.