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 1967
[Report of the Medical Officer of Health for Waltham Forest]
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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 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) |
| Thames derived -North of River | 207 | 0.026 | 0.090 | 4.1 | 1.12 | 289 | 75 | 5 | 22.3 | 5.0 | 30 | 1.9 | 10 | 62 | 0.30 | 0.01 | 0.1 | 12 | 7.9 | 600 | ||
| Lee Bridge | 52 | 0.025 | 0.105 | 4.7 | 1.19 | 335 | 105 | 7 | 33.4 | 7.2 | 43 | 2.7 | 8 | 104 | 0.35 | 0.03 | 0.2 | 14 | 8.1 | 720 | ||
| Ferry Lane | 32 | 0.039 | 0.065 | 3.3 | 0.53 | 353 | 116 | 36 | 1.3 | 12 | 0.2 | 5 | 7.5 | 730 | ||||||||
| Chingford Mill | 4 | 0.105 | 0.052 | 0.5 | 0.39 | 309 | 94 | 14 | 23 | 5.8 | 30 | 110 | 0.55 | 22 | 0.0 | 3 | 7.5 | 560 | ||||
| Coppermill | 7 | 0.028 | 0.123 | 4.3 | 1.21 | 319 | 100 | 7 | 33.4 | 7.2 | 41 | 2.3 | ' 7 | 104 | 0.35 | 0.03 | 0.1 | 10 | 8.3 | 730 |
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