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

Lewisham 1971

[Report of the Medical Officer of Health for Lewisham Borough]

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Table: Table 72 AVERAGE RESULTS OF THE CHEMICAL EXAMINATION OF WATER SUPPLIES TO THE LONDON BOROUGH OF LEWISHAM DURING 1971Milligrammes per litre (unless otherwise stated)

Table 72 AVERAGE RESULTS OF THE CHEMICAL EXAMINATION OF WATER SUPPLIES TO THE LONDON BOROUGH OF LEWISHAM DURING 1971

Milligrammes per litre (unless otherwise stated)

Description of the SampleNumber of SamplesAmmoniacal NitrogenAlbuminoid NitrogenNitrate NitrogenOxygen abs. from KMnO 4 hrs at 27°CB.O.D. 5 days at 20°CHardness (total) CaCO,Hardness (non-carbonate) CaCO3Magnesium as MgSodium as NaPotassium as KChloride as CIPhosphate as PO4Silicate as SiO2Sulphate as SO4Natural Fluoride as FSurface-active material as Manoxol OTTurbidity unitsColour (Burgess units)pH valueElectrical Conductivity (micromhos)
River Thames—Derived3640.0290.0846.11.04-28190523.551342.310640.150.020.1137.8580
Bexley50.0110.0196.00.09-30874---23---0.10-0.037.2570
Darenth40.0090.0216.20.11-28560---21---0.10-0.017.2550
Deptford40.0090.0206.50.11-367128---42---0.15-0.127.2740
Wilmington40.0200.0299.00.19-29574---28---0.14-0.017.4560