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 1967
[Report of the Medical Officer of Health for Southwark, Borough of]
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METROPOLITAN WATER BOARD- WATER EXAMINATION DEPARTMENT
AVERAGE RESULTS OF THE CHEMICAL EXAMINATION OF WATER SUPPLIED TO THE LONDON BOROUGH OF SOUTHWARK
Milligrammes per litr (unless otherwise stated)
| Description of the Sample | Number of Samples Day of the month | Ammoniacal Nitrogen | Albuminoid Nitrogen | Nitrate Nitrogen | Oxygen abs. from KMnO4 4 hrs at 27°C. | B.O.D. 5 days at 20°C. | Hardness (total) CaCO3 | Hardness (non-) carbonate CaCO8 | Magnesium as Mg | Sodium as Na | Potasium K | Chloride as CI | Phosphate as PO4 | Silicate as so2 | Sulphate as SO4 | Natural Fluoride as F | Surface-active material as Manoxol OT | CO2 | Turbidity units | Colour (Burgess units) | PH value | Electrical Conductivity (micromhos) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) | (11) | (12) | (13) | (14) | (15) | (16) | (17) | (18) | (19) | (20) | (21) | (22) | (23) |
| HAMPTON | 52 | 0.019 | 0.090 | 4.2 | 1.10 | 284 | 72 | 5 | 22.6 | 5.1 | 30 | 1.9 | 10 | 64 | 0.30 | 0.01 | 0.1 | 11 | 7.9 | 590 | ||
| THAMES-DERIVED, South of River | 156 | 0.021 | 0.088 | 4.2 | 1.12 | 272 | 69 | 5 | 22.6 | 5.1 | 30 | 1.9 | 9 | 64 | 0.30 | 0.01 | 0.1 | 12 | 7.9 | 580 | ||
| HONOR OAk WELL | 1 | 0.054 | 0.024 | 0.4 | 300 | 45 | 10.5 | 3.4 | 13 | 0.5 | 33 | 0.3 | 3 | 7.3 | 500 |
BACTERIOLOGICAL RESULTS- YEARLY AVERAGES,
of Water supplied to London Borough of Southwark.
| Source of supply | BEFORE TREATMENT | AFTER TREATMENT | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Number of samples | Agar plate count per ml. | Coliform count | Escherichia coli count | Number of samples | Agar plate count per ml. | Coliform count | E. coli count | |||||
| 20-24 hours at 37°C. | 3 days at 22°C. | Per cent. samples negative in 100 ml. | Count per 100 ml. | Per cent. samples negative in 100 ml. | Count per 100 ml. | 20-24 hours at 37°C. | 3 days at 22°C. | Per cent. samples negative in 100 ml. | Per cent. samples negative in 100 ml. | |||
| hampton | 1,158 | 7.3 | 99.91 | 100.0 | ||||||||
| thames-derived, South of River | 1,887 | 8.8 | 99.52 | 99.95 | ||||||||
| honor oak well | 54 | 0.0 | 1 | 100.0 | — | 100.0 | — | 54 | 0.0 | 11 | 100.0 | 100.0 |
50 51