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Bacteriological Examinations
Number of colonies developing per millilitre of waters
on agar in 2 days at 37°C 25
on agar in 3 days at 22°C 47
Bacteria of indication enumeration:
Organisms of the coliform group 0 in 100 ml.
Streptococci 0 - " -
CL. Welchii 0 - " -
Remarks:
This water is of excellent organic purity, attractive in appearance
and is free from contaminating metalso It is of very moderate
hardness and corresponds in chemical composition to a partially
softened water from a chalk supply.
The bacteriological condition of the water is satisfactory, the
few organisms developing being harmless types of no adverse
significance.
As judged by this examination, the water is pure and wholesome and
is suitable for the public supply.
(signed) Daniel Do 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., AoM.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 Fridays, 10th June, 1966.
The lowest temperature during the year, of 21°F., occurred on the 18th
January.
Rainfall (Sutton,, Carshalton Road)
Rain fell on 172 days in 1966.
The heaviest rainfall amounted to 1.41 inches.
The total rainfall during the year amounted to 28.28 inches compared with
the 35 year average of 25.72 inches.
Consumptions
Maximum daily consumption - 30th July, 1966 17,005,000 gals.
Average daily consumption throughout
the area during the year 11,960,000 gals.
This represents an increase over the 1965 figure of 564,000 gallons
or 4.95%.
No restrictions of any kind were imposed during the year and all
consumers had an adequate supply of water for all purposes.
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