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
Lambeth 1970
[Report of the Medical Officer of Health for Lambeth Borough]
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BACTERIOLOGICAL RESULTS - YEARLY AVERAGES, 1970 of the Water Supplied to the London Borough of Lambeth
| BEFORE TREATMENT | AFTER TREATMENT | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Source of supply | Number of samples | Agar plate count per ml. | Coliform count | Escherichia coli count | Number of samples | Agar plate count per ml. | Coliform count | E. coli count | ||||
| 20-24 hours at 37°C | 3 days at 22°C | Per cent. samples negative in 100 ml. | Count per 100 ml. | Per cent. samples negative in 100 ml. | Count per 100 ml. | 20-24 hours at 37°C | 3 days at 22°C | Per cent. samples negative in 100 ml. | Per cent. samples negative in 100 ml. | |||
| River Thames -derived | 8,259 | 31.9 | 37.91 | 17.3 | 53.58 | 4.7 | 3,710 | 8.0 | 99.92 | 99.97 | ||
| Honor Oak | 60 | 0.1 | 4 | 96.67 | 0.1 | 100.0 | - | 59 | 0.1 | 18 | 100.0 | 100.0 |
| Merton Abbey | 8 | 0.1 | 3 | 100.0 | - | 100.0 | - | 8 | 0.0 | 3 | 100.0 | 100.0 |