London's Pulse: Medical Officer of Health reports 1848-1972

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Orpington 1960

[Report of the Medical Officer of Health for Orpington]

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Result of the Bacteriological Examination of the Water supplied to Orpington during the Year 1960.

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.
Eynsford No. 1 well197-7471.071.296.950.12560.11299.61100
Eynsford No. 2 well140-398.57-100-
Horton Kirby No. 1 well2160.210592.130.795.370.42460.27599.59100
Horton Kirby No. 2 well1500.31498.67-100-
Lullingstone No. 1 well840.19398 81_100_2120.27399.53100
Lullingstone No. 2 well620.261100-100-
Orpington well2470.13888.260.2100-2530.1899-60100
North Orpington well22659.44377.96134.420.3550.32293.11099.1399.56
Shortlands No. 1 well740.111001002570.119100100
Shortlands No. 2 well201-199.500.1100-
Shortlands No. 3 well2261.02599.12100-
Sundridge No. 2 well2030.410100-100-2530.12100100
Sundridge No. 4 well1200.118100-100-
Thames derived-1,8748.699.57100
(Southern Group)
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