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(2) The samples shall be odourless when subjected to a
heating test of 80 degrees C. and shaken.
(3) The sample shall be bright, clear and colourless.
(4) Nitrogen as Nitrites should be absent.
(5) The albuminoid Ammonia content shall not exceed 02
parts per 100,000.
Bacteriological Examination.
(1) That five 1 c.c. counts on Agar at a temperature of 37
degrees C. for 48 hours be made.
(2) That the count on any one sample shall not exceed 200
colonies per c.c.
(3) That B. Coli shall be absent in 100 c.c. of the water
tested.
(4) The sample should give a negative "stormy-fermentation"
(B. Welchii) reaction in 100 c.c. of the water
tested.
During 1935, the Public Health Department took samples of
water from the various baths, three for chemical and two for
bacteriological examination. Two of the chemical and one of
the bacteriological samples were returned as satisfactory, whilst
one chemical and one bacteriological samples were reported as
unsatisfactory. Immediate action was taken in regard to the
unsatisfactory samples.
(2) The Hampstead Swimming Pond.
This is situated on Hampstead Heath. All the ponds on the
Heath are flowing water, whilst bathing facilities are provided in
the Hampstead pond by the London County Council. It is, of
course, impracticable to attempt purification of this pond by means
of chlorination or etc., but it is proposed, during the year 1936,
to take water samples for chemical and bacteriological examination
to ascertain whether or not the pond is safe for bathing.
(b) Privately owned swimming baths open to the public.
Gilling Court and Holmefield Court, Belsize Grove, Swimming
Pool.
This swimming pool was constructed in 1934, principally for
the use of the tenants of these flats, but is also open to friends of
tenants.