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
Waltham Forest 1972
[Report of the Medical Officer of Health for Waltham Forest]
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METROPOLITAN WATER BOARD - WATER EXAMINATION DEPARTMENT
AVERAGE RESULTS OF THE CHEMICAL EXAMINATION OF WATER SUPPLIED TO THE LONDON BOROUGH
OF WALTHAM FOREST DURING 1972
Milligrammes per litre (unless otherwise stated)
| Description of the Sample | Number of Samples Day of the month | Ammoniacal Nitrogen | Albuminoid Nitrogen | Nitrate Nitrogen | Oxygen abs. from KMn04 4 hrs. at 27°- C. | B.O.D. 5 days at 20°. C. | Hardness (total) CaC03 | Hardness (non-carbonate) CaC03 | Magnesium as Mg | Sodium as Na | Potassium as K | Chloride as CL | Phosphate as P04 | Silicate as Si02 | Sulphate as S04 | Natural Fluoride as F | Surface-active material as Manoxol OT | Turbidity units | Colour (Burgess units) | pH value | Electrical Conductivity (micromhos) | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) | (M) | (12) | (13) | (14) | (15) | (16) | (17) | (18) | (19) | (20) | (21) | (22) | (23) |
| Thames-derived | 364 | 0.031 | 0.069 | 6.9 | 1.06 | - | 274 | 82 | 5 | 24.5 | 5.5 | 35 | 2.8 | 10 | 58 | 0.15 | 0.02 | 0.1 | 13 | 7.9 | 570 | |
| Chingford MiII | 4 | 0.23 | 0.030 | 0.8 | 0.30 | - | 288 | 72 | 17.0 | 27 | 0.45 | 0.1 | 6 | 7.3 | 550 | |||||||
| CoppermilIs | 52 | 0.019 | 0.100 | 8.9 | 1.36 | - | 309 | 96 | 6 | 34.6 | 7.3 | 50 | 4.0 | 10 | 72 | 0.17 | 0.02 | 0.1 | 14 | 7.9 | 680 |