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 1969

[Report of the Medical Officer of Health for Richmond]

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Table: AVERAGE RESULTS OF THE CHEMICAL EXAMINATION of the water supplied to the London Borough of Richmond uponThames during 1969. Milligrammes per litre (unless otherwise stated).

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

Thames during 1969. Milligrammes per litre (unless otherwise stated).

Description of the SampleNumber of SamplesAmmoniacal NitrogenAlbuminoid NitrogenNitrate NitrogenOxygen abs. from KMn044 hrs. at 27° C.B.O.D 5 days at 20° C.Hardness (total) CaC03Hardness (non-carbonate) CaC03Magnesium as MgSodium as NaPotassium as KChloride as CIPhosphate as P04Silicate as Si02Sulphate as S04Natural Fluoride as FSurface-active material as Manoxol OTTurbidity unitsColour (Burgess units)pH valueElectrical 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)
Hampton530.0150.0884.31.0528080524.15.5322.210580.250.020.1107.9540
BACTERIOLOGICAL RESULTS — YEARLY AVERAGES, 1969
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.
Hampton1,95289.141.7014.455.584.61,19813.4100.0100.0