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

Richmond upon Thames 1967

[Report of the Medical Officer of Health for Richmond upon Thames]

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Table: AVERAGE RESULTS OF THE CHEMICAL EXAMINATION of water supplied to the London Borough of Richmond upon ThamesMilligrammes per litre (unless otherwise stated)

AVERAGE RESULTS OF THE CHEMICAL EXAMINATION of water supplied to the London Borough of Richmond upon Thames

Milligrammes per litre (unless otherwise stated)

Description of the SampleNumber of SamplesAmmoniaacal NitrogenAlbuminoid nitrogenNitrate NitrogenOxygen abs. from KMnO44 hrs. at 27ºC.B.O.D. 5l days at 20º C.Hardness (total) CaCO3Hardness (non-carbonate) CaCO3Magnesium as MgSodium as NAPotassium as KChloride as ClPhosphate as PO4Silicate as SiO2Sulphate as SO4Natarural Fluoride as FSuface-active material as Manoxol OTTurbidity unitsColour (Burgess units)pH valueElectical Conductivity (micromhos)
(1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)
Hampton520.0190.0904.21.1028472522.65.1301.910640.300.010.1117.9590

Table: BACTERIOLOGICAL RESULTS — YEARLY AVERAGES, 1967

BACTERIOLOGICAL RESULTS — YEARLY AVERAGES, 1967

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° C.Per cent. samples negative in 100 ml.Per cent. samples negative in 100 ml.
Hampton1,1587.399.91100.0