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
Lewisham 1972
[Report of the Medical Officer of Health for Lewisham Borough]
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AVERAGE RESULTS OF THE CHEMICAL EXAMINATION OF WATER SUPPLIED TO THE LONDON BOROUGH OF LEWISHAM DURING 1972
Milligrammes per litre (unless otherwise stated)
| Description of the Sample | Number of Samples | Ammoniacal Nitrogen | Albuminoid Nitrogen | Nitrate Nitrogen | Oxygen abs from KMn04 4 hrs at 27°C | BOD 5 days at 20°C | Hardness (total) CaC03 | . Hardness (non-carbonate) CaC03 | Magnesium as Mg | Sodium as Na | Potassium as K | Chloride as CI | Phosphate as P04 | Silicate as Si02 | Sulphate as S04 | Natural Fluoride as F | Surface-active material as Manoxol OT | C02 | 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) |
| River Thames - derived | 364 | 0.031 | 0.069 | 6.9 | 1.06 | - | 274 | 32 | 5.0 | 24.5 | 5.5 | 35 | 2.8 | 10 | 58 | 0.15 | 0.02 | - | 0.1 | 13 | 7.9 | 570 |
| Bexley | 4 | 0.007 | 0.016 | 7.1 | 0.14 | - | 320 | 76 | 4.0 | 34 | - | 23 | - | - | - | 0.11 | - | 34 | 0.0 | 3 | 7.1 | 580 |
| Darenth | 4 | 0.000 | 0.015 | 5.9 | 0.12 | - | 268 | 43 | 2.8 | 31 | - | 17 | - | - | - | 0.11 | - | 31 | 0.1 | 2 | 7.3 | 500 |
| Deptford | 4 | 0.007 | 0.014 | 8.2 | 0.10 | - | 378 | 144 | 8.5 | 36 | - | 48 | - | - | - | 0.15 | - | 36 | 0.0 | 2 | 7.2 | 750 |
| Merton | 1 | 0.070 | 0.016 | 0.5 | 0.04 | - | 244 | 24 | 13.0 | - | - | 23 | - | - | - | 0.40 | - | - | 1.3 | 22 | 7.3 | 450 |
| Wilmington | 4 | 0.006 | 0.015 | 9.5 | 0.26 | - | 290 | 53 | 3.5 | 33 | - | 25 | - | - | - | 0.10 | - | 33 | 0.0 | 1 | 7.2 | 550 |