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 1973
[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 27C. | 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) | (12) | (13) | (14) | (15) | (16) | (17) | (18) | (19) | (20) | (21) | (22) | (23) | |
| Thames-derived | 357 | 0.039 | 0.080 | 7.4 | 1 .00 | - | 276 | 74 | 5.7 | 27.5 | 41 | 3.0 | 9 | 62 | 0.15 | 0.02 | - | 0.1 | 8 | 7.8 | 580 | |
| Chingford Mill | 0.23 | 0-037 | 0.7 | 0.24 | - | 288 | 68 | - | - | - | 27 | - | - | - | 0.43 | - | - | 0.1 | 4 | 7 3 | 550 | |
| Coppermills | 0.049 | 0.100 | 8.7 | 1 .24 | - | 281 | 84 | 6.0 | 37.1 | 7.5 | 50 | 4.3 | 10 | 66 | 0.18 | 0.04 | - | 0.2 | 7.8 | 610 |
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