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

View report page

Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London

Richmond upon Thames 1971

[Report of the Medical Officer of Health for Richmond]

This page requires JavaScript

Table: AVERAGE RESULTS OF THE CHEMICAL EXAMINATION of the water supplied to the London Borough of Richmond uponThames during 1971. 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 1971. Milligrams per litre (unless otherwise stated).

Description of the SampleNumber of SamplesAmmoniacal NitrogenAlbuminoid NitrogenNitrate NitrogenOxygen abs. from KMnO44 hrs. at 27° C.B.O.D 5 days at 20° C.Hardness (total) CaCO3Hardness (non-carbonate) CaC03Magnesium as MgSodium as NaPotassium as KChloride as CIPhosphate as P04Silicate as SiO2Sulphate 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-Derived3640.0290.0846.11.04—28190523.55.1342.310640.150.02—0.1137.8580

Table: BACTERIOLOGICAL RESULTS — YEARLY AVERAGES, 1971

BACTERIOLOGICAL RESULTS — YEARLY AVERAGES, 1971

Source of supplyBEFORE TREATMENTAFTER TREATMENT
1 Agar plate count per ml.Coliform countEscherichia coli countAgar 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.Number of samples20-24 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-Derived8,15453.9-40.3712.254.915.13,9018.4—99.5199.97