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
Sutton and Cheam 1962
[Report of the Medical Officer of Health for Sutton and Cheam]
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The supply from all sources has been satisfactory in quality and
quantity.
No action was necessary in respect of contamination during the year
All the dwelling houses have a direct supply from the public mains,
as follows:-
(a) Twenty six thousand and eight houses, with a population of seventy
eight thousand four hundred and twenty one are supplied to a tap directly
info the house.
(b) Five houses with a population of nine are supplied by stand-pipes.
The Sutton District Water Company supply twenty five thousand five
hundred and seventy five dwellings and the remaining four hundred and
thirty eight dwellings are supplied by the Metropolitan Water Board.
The following is an average monthly analysis:-
| Chemical Results in Parts per Million | Average Bright with a slight white deposit of minute particles of calcium carbonate |
|---|---|
| Appearance | |
| Turbidity | Less than 3 |
| Colour | Nil |
| Odour | Nil |
| pH | 8.8 |
| Free Carbon Dioxide | Absent |
| Electric Conductivity | 280 |
| Dissolved Solids dried at 180 C. | 215 |
| Chlorine present as Chloride | 20 |
| Alkalinity as Calcium Carbonate | 50 |
| Hardness (grains per gallon) | |
| Carbonate | 3.5 |
| Non-carbonate | 45 |
| Total | 8 0 |
| Nitrate Nitrogen | 11 |
| Nitrite Nitrogen | Absent |
| Ammoniacal Nitrogen | 0.13 |
| Albuminoid Nitrogen | 0.000 |
| Oxygen Absorbed | 0.05 |
| Residual Chlorine | 0.15 |
| Metals - Iron, Zinc, Copper and Lead | Absent |
| Bacteriological Results | |
| No. of colonies developing on Agar per ml. for 3 days at 20°C | 0 |
| No. of colonies developing on Agar per ml. for 1 day at 37°C. | 0 |
| Presence of Bacillus Coli in 100 ml. | 0 |