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

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Twickenham 1959

[Report of the Medical Officer of Health for Twickenham]

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19
Table 7
AVERAGE RESULTS OP THE CHEMICAL AND BACTERIOLOGICAL EXAMINATION OF THE WATER SUPPLY TO THE BOROUGH OF TWICKENHAM
FOR 1959
Milligrammes per litre (unless otherwise stated)

(a) Chemical

Description of the SampleNo. of SamplesAmmonia NitrogenAlbuminoid NitrogenOxidised Nitrogen (Nitrate)Chlorides as Cl.Oxygen abs. from Permanganate 4 hrs. at 27ºCTurbidity in terms of SilicaColour, mm. brown 2ft. tube Burgess's TintometerHardness (Total)Hardness (Non-carbonate)pH ValuePhosphate as PO4Silicate as SiO2Sulphate as SO4Fluoride as FMagnesium as MgElectrical Conductivity (gemmhos)
Hampton52.022.0753.8281.080.410250567.70.959540.24.0525

(b) Bacteriological

Description of the SampleNo. of SamplesAgar Plate count per millilitreColiform count Percentage samples negative in 100 ml.
37°C 20-24 hrs.3 days at 22°CColiformE.Coli
Hampton9766.7100.0100.0