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 1968
[Report of the Medical Officer of Health for Waltham Forest]
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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 | 0.019 | 0.085 | 3.8 | 1.19 | 287 | 78 | 5 | 23.4 | 5.2 | 32 | 1 .9 | 9 | 62 | 0.30 | 0.02 | 0.1 | 14 | 8.0 | 570 | ||
| Lee Bridge | 52 | 0.025 | 0.092 | 3.7 | 1.15 | 316 | 96 | 6 | 33.5 | 7.3 | 44 | 2.8 | 10 | 96 | 0.35 | 0.03 | 0.1 | 14 | 8.1 | 670 | ||
| Ferry Lane | 3 | 0.014 | 0.082 | 4.1 | 1.11 | 371 | 149 | 6 | 33.5 | 7.3 | 45 | 2.4 | 12 | 96 | 0.35 | 0.03 | 0.1 | 7 | 7.7 | 750 | ||
| Chingford Mill | 4 | 0.142 | 0.029 | 0.4 | 0.33 | 276 | 59 | 25 | 0.55 | 0.1 | 2 | 7.5 | 560 | |||||||||
| Coppermill | 33 | 0.021 | 0.105 | 3.3 | 1.24 | 314 | 98 | 6 | 33.5 | 7.3 | 42 | 2.7 | 8 | 96 | 0.35 | 0.03 | 0.2 | 13 | 8.2 | 620 |