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 1972

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

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Table: AVERAGE RESULTS OF THE CHEMICAL EXAMINATION of the water supplied to the London Borough of Richmond uponThames during 1972. Milligrams per litre (unless otherwise stated).

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

Thames during 1972. Milligrams 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) CaCO,Hardness (non-carbonate) CaCO,Magnesium as MgSodium as NaPotassium as KChloride as C1Phosphate as P04Silicate as SiO,Sulphate 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)
River Thames-Derived520.0300.0717.41.14—282825.525.05.7353.211580.150.02-0.1147.8580

Table: BACTERIOLOGICAL RESULTS — YEARLY AVERAGES, 1972

BACTERIOLOGICAL RESULTS — YEARLY AVERAGES, 1972

Source of supplyBEFORE TREATMENTAFTER TREATMENT
Agar plate count per ml.Coliform countEscherichia coli countNumber of samplesAgar plate count per ml.Coliform countE. coli count
Number of samples20-24 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.
River Thames-Derived1,82177.6—40.1412.950.637.51,1839.8—100.0100.0