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

Orpington 1959

[Report of the Medical Officer of Health for Orpington]

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Table: Result of the Bacteriological Examination of the Water supplied to Orpington during the Year 1959.Parts per million (unless otherwise stated)BACTERIOLOGICAL RESULTS

Result of the Bacteriological Examination of the Water supplied to Orpington during the Year 1959.

Parts per million (unless otherwise stated)

BACTERIOLOGICAL RESULTS

Source of supplyBEFORE TREATMENTAFTER TREATMENT
Number of samplesAgar plate count per ml.Coliform countEscherichia coli countNumber of samplesAgar plate count per ml.Coliform countE. 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°CPer cent, samples negative in 100 ml.Per cent, samples negative in 100 ml.
Orpington2520-2393-250-299-602570-1799-2299-6
North Orpington2452-32317-5520-033-471002500-92100100
Eynsford Well2290-1981-221-499-13—} 2580-125100100
Eynsford Borehole175013100—100_
Lullingstone2520-1399-60100—2570-325100100
Sundridge No.22500-13100100—} 2530-16100100
Sundridge No.445—3100—100—
Westerham 2500141100—100—2550-1998-04100
Thames derived---—-—3,3449-899-4699-97