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

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Twickenham 1960

[Report of the Medical Officer of Health for Twickenham]

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AVERAGE RESULTS GP THE CHEMICAL EXAMINATION OP WATER SUPPLIED TO THE BOROUGH OF TWICKENHAM

DURING I960

Milligrammes per litre (unless otherwise stated)

Description of the SampleNo. of samplesAmmonia NitrogenAlbuminoid NitrogenOxidised Nitrogen NitrateChlorides as ClOxygen abs. from Permanganate 4 hrs, at 27°C.Turbidity unitsColour m.m. brown 2 ft. Tube BurgessDs TintometerHardness (Total)Hardness (non"carbonate)pH ValuePhosphate as POt,Silicate as S1O2Sulphate as SOtjFluoride as FMagnesium as MgSurface Active Material as ManoxolB.OcD* 5 days at 20^CElectrical Conductivity (gemmhos)
River Thames derived
(Southern Group)1560.0380.0804.0281.260.314254687.81.009580.2540.12525

BACTERIOLOGICAL RESULTS - YEARLY AVERAGES,, 1960

Source of supplyAfter Treatment
Number of Samp IesAgar plate count per ml„Coliform countEoColi count
20=24 hours at 37°CI3 days at 22°C*Per cent» samples negative in 100 mloPer cento samples negative in 100 ml,
River Thames derived (Southern Group)1,8748,699.57100o0

Table 7