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
Greenwich 1970
[Report of the Medical Officer of Health for Greenwich Borough]
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Milligrammes per litre (unless otherwise stated)
| Description of the Sample | No. of Samples Day of the month | Ammoniacal Nitrogen | Albuminoid Nitrogen | Nitrate Nitrogen | Oxygen abs. from KMnO44 hrs. at 27°C. | B.O.D. 5 days at 20° C | Hardness (total) CaCO3 | Hardness (non-carbonate) CaC03 | Magnesium as Mg | Sodium as Na | Potassium as K | Chloride as C1 | Phosphate as po4 | Silicate as SiO2 | Sulphate as so4 | Natural Fluoride as F | Surface-active material as Manoxol OT | Turbidity units | Colour (Burgess units) | pH value | Electrical Conductivity (micro-ohms) | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (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 | 363 | 0.026 | 0.083 | 4.8 | 1.02 | 274 | 79 | 5 | 27.7 | 5.6 | 40 | 2.7 | 9 | 70 | 0.20 | 0.03 | 0.1 | 11 | 7.9 | 570 | ||
| Bexley Well | 4 | 0.010 | 0.014 | 5.7 | 0.19 | 327 | 85 | 23 | 0.10 | 0.0 | 3 | 7.3 | 580 | |||||||||
| (a) Crayford No. 1 | 4 | 0.008 | 0.032 | 8.4 | 0.24 | 391 | 132 | 34 | 0.15 | 0.0 | 1 | 7.1 | 640 | |||||||||
| (b) Crayford No. 2 | 4 | 0.007 | 0.019 | 6.2 | 0.10 | 302 | 76 | 28 | 0.15 | 0.1 | 2 | 7.2 | 550 | |||||||||
| (c) Crayford No. 3 | 4 | 0.009 | 0.039 | 7.4 | 0.19 | 341 | 104 | 29 | 0.15 | 0.0 | 4 | 7.2 | 600 | |||||||||
| Darenth Well | 4 | 0.004 | 0.028 | 4.8 | 0.11 | 270 | 44 | 18 | 0.10 | 0.0 | 2 | 7.2 | 480 | |||||||||
| Deptford Well | 4 | 0.002 | 0.020 | 6.1 | 0.12 | 366 | 101 | 39 | 0.20 | 0.0 | 3 | 7.2 | 650 | |||||||||
| Wansunt Well | 52 | 0.160 | 0.038 | 6.3 | 0.21 | 348 | 94 | 31 | 0.10 | 0.1 | 3 | 7.1 | 640 | |||||||||
| Wilmington Well | 4 | 0.005 | 0.022 | 7.5 | 0.13 | 295 | 65 | 29 | 0.15 | 0.1 | 1 | 7.2 | 540 |