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 1964

[Report of the Medical Officer of Health for Twickenham]

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Table: Table 6AVERAGE RESULTS OF THE CHEMICAL EXAMINATION OF THE WATERS SUPPLIED TO THE BOROUGH OFTWICKENHAM IN 1964Milligrammes per litre (unless otherwise stated)

Table 6

AVERAGE RESULTS OF THE CHEMICAL EXAMINATION OF THE WATERS SUPPLIED TO THE BOROUGH OF

TWICKENHAM IN 1964Milligrammes per litre (unless otherwise stated)

Description of the sampleNo. of SamplesAmmoniacal NitrogenAlbuminoid NitrogenNitrate NitrogenChlorides as Cl.Oxygen abs. from KMnO4 4 hrs. at 27°CTurbidity unitsColour (Burgess) scaleHardness (total)Hardness (non-carbonate)pH valuePhosphate as PO4Silicate as Si02Sulphate as SO4Magnesium as Mg.Natural Fluoride as F.Surface active material as Manoxol OTElectrical Conductivity (micromhos)
All Thames derived3710.0330.0794.8331.080.211270647.61.486050.250.09550

Table: BACTERIOLOGICAL RESULTS — YEARLY AVERAGES, 1964

BACTERIOLOGICAL RESULTS — YEARLY AVERAGES, 1964

Source of SupplyNumber of SamplesAfter Treatment
Agar 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.Per cent. samples negative in 100 ml.
All Thames derived3,81114.1—99.95100.0