London's Pulse: Medical Officer of Health reports 1848-1972
View report page
Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London
Feltham 1963
[Report of the Medical Officer of Health for Feltham]
This page requires JavaScript
11
I Typical Analysis of South-West Suburban Water
Company's Supply (Parts per million)
Appearance—Faint opalescence with a very slight deposit
Turbidity—Microscopical examination—mineral matter
less than 3
Colour 7
Odour nil
pH 7.4
Free Carbon Dioxide 16
Electric Conductivity 560
Total Solids 390
Chlorine present as Chloride 34
Alkalinity as Calcium Carbonate 205
Hardness: Total 290
(Carbonate 205: Non-Carbonate 85)
Nitrate Nitrogen 5.6
Nitrite Nitrogen absent
Ammoniacal Nitrogen 0.005
Albuminoid Nitrogen 0.072
Oxygen Absorbed 0.80
Residual Chlorine 0.05
Metals—Iron, Zinc, Lead absent
Copper 0.08
Anionic Synthetic Detergents as manoxol O.T. 0.4
Bacteriological
| No. of Colonies developing on Agar | 1 day at 37°C 4 per ml. Present in | 2 days at 37°C 6 per ml. Absent from | 3 days at 20 °C 7 per ml. Probable number | |
|---|---|---|---|---|
| Presumptive Coli aerogenes Reaction | — ml. | 100 ml. | 0 per 100 ml. | |
| Bact. coli (type 1) | — ml. | 100 ml. | 0 per 100 ml. | |
| CI. Welchii Reaction | 100 ml. | 10 ml. | ||
II Average Results of Analyses of Metropolitan Water
Board Supply (Hampton Works)
(Milligrammes per litre)
Chemical (52 samples)
Ammoniacal Nitrogen 0.165
Albuminoid Nitrogen 0.076
Nitrate Nitrogen 3.9
Chlorides as CI 32
Oxygen abs. from KMnO4 4 hrs. at 27°C 1.22
Turbidity Units 0.3
Colour (Burgess) Scale 11
Hardness (total) 276
Hardness (non-carbonate) 68
pH value 7.8
Phosphate as PO4 1.3
Silicate as SiO4 . 12
Sulphate as SO4 60
Magnesium as Mg 5
Natural Fluoride as F 0.25
Surface active material as Manoxol OT 0.08