London's Pulse: Medical Officer of Health reports 1848-1972
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Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London
Kingston upon Thames 1971
[Report of the Medical Officer of Health for Kingston-upon-Thames]
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95
WATER SUPPLY
The following information has been kindly supplied by the Director
of Water Examination, Metropolitan Water Board.
All the water supplied to the borough is derived from the River
Thames.
Yearly Average Bacteriological Results
Before Treatment
Number of Samples 8.154
Agar plate count per ml. 20-24 hours at 37°C 53.9
Coliform count -
Per cent, samples negative in 100 ml. 40.37
Count per 100 ml 12.2
Escherichia coli count -
Per cent, samples negative in 100 ml 54.91
Count per 100 ml 5.1
After Treatment
Number of Samples 3.901
Agar plate count per ml. 20-24 hours at 37°C 8.4
Coliform count - per cent samples negative in 100 ml 99.51
E. coli count - per cent samples negative in 100 ml 99.97