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
Bromley 1970
[Report of the Medical Officer of Health for Bromley]
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AVERAGE RESULTS OF THE CHEMICAL EXAMINATION OF WATER SUPPLIED TO THE LONDON BOROUGH OF BROMLEY, 1970
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 KMnO 4 hrs. at 27°C. | B.O.D. 5 days at 20°C. | Hardness (total)CaCO3 | Hardness (non-carbonate) CaCO3 | Magnesium as Mg | Sodium as Na | Potassium as K | Chloride as CI | Phosphate as P04 | 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 (micromhos) | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) | (11) | (12) | (13) | (14) | (15) | (16) | (17) | (18) | (19) | (20) | (21) | (22) | (23) |
| River 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 | ||
| Merton Abbey | 3 | 0.015 | 0.021 | 0.8 | 0.12 | 244 | 22 | 16 | 0.50 | 0.3 | 6 | 7.3 | 480 | |||||||||
| Eynsford | 8 | 0.008 | 0.015 | 3.7 | 0.09 | 266 | 39 | 18 | 0.10 | 0.0 | 2 | 7.3 | 480 | |||||||||
| Horton Kirby | 9 | 0.005 | 0.016 | 4.8 | 0.08 | 275 | 57 | 23 | 0.10 | 0.1 | 2 | 7.2 | 480 | |||||||||
| Jewels Wood | 2 | 0.008 | 0.010 | 3.1 | 0.06 | 242 | 22 | 11 | 0.15 | 0.1 | 1 | 7.3 | 450 | |||||||||
| Lullingstone | 8 | 0.004 | 0.014 | 3.8 | 0.04 | 264 | 43 | 16 | 0.10 | 0.2 | 4 | 7.3 | 470 | |||||||||
| North Orpington | 8 | 0.008 | 0.013 | 4.2 | 0.04 | 278 | 38 | 16 | 0.10 | 0.1 | 2 | 7.2 | 500 | |||||||||
| Orpington | 4 | 0.008 | 0.023 | 6.4 | 0.08 | 295 | 53 | 21 | 0.10 | 0.0 | 2 | 7.2 | 540 | |||||||||
| Shortlands | 8 | 0.007 | 0.018 | 4.9 | 0.05 | 296 | 74 | 23 | 0.15 | 0.0 | 1 | 7.3 | 530 | |||||||||
| Sundridge | 14 | 0.004 | 0.013 | 3.6 | 0.04 | 226 | 70 | 21 | 0.10 | 0.1 | 1 | 7.3 | 440 | |||||||||
| West Wickham | 2 | 0.009 | 0.026 | 6.4 | 0.10 | 298 | 56 | 25 | 0.10 | 0.2 | 4 | 7.2 | 510 |