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
Twickenham 1952
[Report of the Medical Officer of Health for Twickenham]
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(b) Bacteriological.
| Description of the Sample | Number of Samples | Plate count (average per milli-litre) Colonies counted on agar after 20-24 hrs. at 37°C. | Bad. coli test | |
|---|---|---|---|---|
| Percentage of samples negative in 100 ml. | Average number of Bad. coli per 100 ml. | |||
| River Thames water filtered at Hampton Works | 786 | 7.0 | 99.9 | 0.004 |
(b) Bacteriological.
Description of the Sample
Number of Samples
Plate count (average per millilitre)
Colonies counted on
agar after 20-24 hrs. at 37°C.
Bad. coli test
Percentage of samples
negative in 100 ml.
Average number of
Bad. coli per 100 ml.
River Thames water filtered at
Hampton Works
786
7.0
99.9
0.004