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Bacteriological Examination:
Number of colonies developing per millilitre of water:
on agar in 2 days at 37°C 1
on agar in 3 days at 22°C 112
Bacteria of indication enumerations
Organisms of the coliform group 0 in 100 ml.
Streptococci 0 - " -
CI. welchii 0 - " -
Remarks:
This water is attractive in appearance, of excellent organic purity,
and is free from contaminating metals. It has the general characteristics
of a softened water from a chalk supply.
The bacteriological condition of the water is satisfactory, the
organisms developing at 22°C being harmless types of no adverse significance.
As judged by this examination the water is pure and wholesome and
suitable for the public supply.
(signed) Daniel D. Moir, M.Sc., F.R.I.C.
Public Analyst.
I am indebted to Mr. E.G.B. Gledhill, B.Sc., M.I.Mech.E., M.I.W.E., A.M.I.C.E.
A.M.I. Struc.E., Engineer and Manager of the Sutton District Water Company,
for his comments which are as follows:
Maximum and Minimum Temperatures:
The maximum temperature of 83°F„ occurred on Friday, 14th May, 1965.
The lowest temperature during the year, of 21°F,, occurred on 27th December,
1965.
Rainfall - (Sutton. Carshalton Road):
Rain fell on 181 days in 1965.
The heaviest rainfall amounted to 2.19 inches on Friday, 3rd September.
The total rainfall during the year amounted to 27.62 inches compared
with the 35 year average of 25.72 inches.
Consumptions:
Maximum daily consumption - Saturday, 4th May, 1965. 15,234,000 gals.
Average daily consumption throughout the area
during the year 11,396,000 "
second highest annual average.
All domestic premises in the London Borough of Sutton, to the best of
my knowledge, have a piped supply.
An unrestricted supply of water was maintained at all times throughout
1965 to all consumers.
Over 2,500 samples were examined by the Company's Chemist and
Bacteriologist in 1965.
R3