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

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Greenwich 1971

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

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METROPOLITAN WATER BOARD—Water Examination Department Average Results of the Chemical Examination of the Water Supply to the London Borough of Greenwich - Year 1971 Milligrammes per litre (unless otherwise stated)

Description of the SampleNo. of SamplesAmmonical NitrogenAlbuminoid NitrogenNitrate NitrogenOxygen abs. from KMnO44 hrs. at 27°C.B.O.D. 5 days at 20° CHardness (total) CaCO3Hardness (non-carbonate) CaC03Magnesium 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 (micro-ohms)
(1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)
Thames-derived3640•0290•0846•11•0428190523•55•1342•310640•150•020•1137•8580
Bexley Well50•0110•0196•00•0930874230•100•037•2570
(a) Crayford No. 140•0070•0338•80•23288143350•100•027•1790
(b) Crayford No. 240•0100•0207•30•0929270300•150•017•2590
(c) Crayford No. 340•0070•0238•50•24347110310•100•027•1670
Darenth Well40•0090•0216•20•1128560210•100•017•2550
Deptford Well40•0090•0206•50•11367128420•150•127•2740
Wansunt Well530•1600•0387•60•1934099310•100•137•1690
Wilmington Well40•0200•0299•00•1929574280•140•017•4560