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 1969
[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
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 C1 | 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) | (11) | (12) | (13) | (14) | (15) | (16) | (17) | (18) | (19) | (20) | (21) | (22) | (23) |
| Thames derived -North of River | 371 | 0.024 | 0.083 | 4.4 | 1.05 | 282 | 79 | 5 | 24.0 | 5.4 | 32 | 2.1 | 9 | 58 | 0.25 | 0.02 | 0.1 | 11 | 7.9 | 550 | ||
| Lee Bridge | 53 | 0.021 | 0.095 | 4.5 | 1.10 | 322 | 98 | 6 | 35.0 | 7.1 | 45 | 3.2 | 9 | 88 | 0.30 | 0.03 | 0.1 | 12 | 8.1 | 660 | ||
| Ferry Lane | 1 | 0.052 | 0.042 | 1.0 | 0.28 | 436 | 201 | 41 | 0.80 | 0.1 | 2 | 7.7 | 850 | |||||||||
| Chingford Mill | 4 | 0.180 | 0.043 | 0.5 | 0.40 | 285 | 73 | 24 | 0.60 | 0.1 | 6 | 7.5 | 530 | |||||||||
| Coppermill | 30 | 0.019 | 0.1 10 | 4.4 | 1.09 | 324 | 103 | 6 | 35.0 | 7.1 | 45 | 3.1 | 6 | 88 | 0.30 | 0.03 | 0.1 | 10 | 8.2 | 650 |
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