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
Southwark 1969
[Report of the Medical Officer of Health for Southwark, Borough of]
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METROPOLITAN WATER BOARD-
AVERAGE RESULTS OF THE CHEMICAL THE LONDON BOROUGH
Milligrammes per litre
| Description of the Sample | Number of Samples Day of the month | Ammoniacal Nitrogen | Albuminoid Nitrogen | Nitrate Nitrogen | Oxygen abs. from KMnO, 4 hrs at 27°C. | B.O.D. 5 days at 20°C. | Hardness (total) CaCO3 | Hardness non carbonate CaCO3 | Magnesium as Mg. |
|---|---|---|---|---|---|---|---|---|---|
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) |
| Thames-derived | 371 | 0.024 | 0.083 | 4.4 | 1.05 | 282 | 79 | 5 | |
| South of Riverf | 4 | 0.045 | 0.021 | 0.2 | 0.10 | 292 | 43 | _. | |
| Honor Oak | 4 | 0.005 | 0.017 | 0.2 | 0.08 | 252 | 38 | ._ |
BACTERIOLOGICAL RESULTS
| Source of supply | BEFORE TREATMENT | ||||
|---|---|---|---|---|---|
| Number of samples | Agar plate count per ml. | Coliform count | |||
| 20-24 hours at 37°C. | 3 days at 22°C. | Per cent. samples negative in 100 ml. | Count per 100 ml. | ||
| Thames-derived, South of Rivert | 8,196 | 66.5 | _ | 39.79 | 19.0 |
| Honor Oak | 81 | 0.0 | 3 | 97.53 | 0.1 |
| Merlon | 19 | 23 | 10 | 100.0 | _ |
3 Hampton, Surbiton & Walton
64