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

Feltham 1962

[Report of the Medical Officer of Health for Feltham]

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Free Carbon Dioxide11
Electric Conductivity580
Total Solids400
Chlorine present as Chloride36
Alkalinity as Calcium Carbonate190
Hardness: Total285
(Carbonate 190; Non-Carbonate 95)
Nitrate Nitrogen5.9
Nitrite Nitrogenabsent
Ammoniacal Nitrogen0.000
Albuminoid Nitrogen0.060
Oxygen Absorbed1.2
Residual Chlorine0.02
MetalsIron, Zinc, Copper and Lead: absent
Bacteriological No. of Colonies developing on Agar1 day at 37°C 0 per ml.2 days at 37°C. 0 per ml.3 days at 20°C. 1 per ml.
Present inAbsent fromProbable number
Presumptive Coliaerogenes Reaction—ml.100 ml.0 per 100 ml.
Bact. coli (type 1)—ml.100 ml.0 per 100 ml.
Cl Welchii Reaction100 ml.10 ml.

Table: II Average Results of Analyses of Metropolitan WaterBoard Supply (Hampton Works)(Milligrammes per litre)

II Average Results of Analyses of Metropolitan Water

Board Supply (Hampton Works)

(Milligrammes per litre)

Chemical
Ammonia Nitrogen0.040
Albuminoid Nitrogen0.078
Oxidised Nitrogen (Nitrate)4.0
Chlorides as Cl31
Oxygen abs. from Permanganate 4 hrs. at 27°C.1.12
Turbidity units0.3
Colour m.m. brown 2 ft. tube Burgess's Tintometer12
Hardness (Total)264
Hardness (non carbonate)58
pH Value7.8
Phosphate as PO41.2
Silicate as SiO29
Sulphate as SO461
Fluoride as F0.25
Magnesium as Mg6
Surface Active Material as Manoxol0.12
Electrical Conductivity (micromhos)550
Bacteriological
Agar Plate Count (per ml.) 20-24 hrs. at 37 C.11.9
Coliform count (percentage of samples negative in 100 ml.)99.91
E.coli count (percentage of samples negative in 100 ml.)100.0