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 1971
[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, 1971
Milligrammes per litre (unless otherwise stated)
| Description of the Sample | No. of Samples | Ammoniacal Nitrogen | Albuminoid Nitrogen | Nitrate Nitrogen | Oxygen abs. from KMnO4 4 hrs. at 27°C. | B.O.D. 5 days at 20°C. | Hardness (total) CaCO 3 | Hardness (non-carbonate) CaCOa | Magnesium as Mg | Sodium as Na | Potassium as K | Chloride as CI | Phosphate as PO4 | Silicate as SiO2 | 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) | (ID | (12) | (13) | (14) | (15) | (16) | (17) | (18) | (19) | (20) | (21) | (22) | (23) |
| River Thames derived | 364 | 0.029 | 0.084 | 6.1 | 1.04 | 281 | 90 | 5 | 23.5 | 5.1 | 34 | 2.3 | 10 | 64 | 0.15 | 0.02 | 0.1 | 13 | 7.8 | 580 | ||
| Eynsford | 8 | 0.009 | 0.016 | 4.9 | 0.06 | 266 | 52 | 19 | 0.10 | 0.0 | 1 | 7.3 | 500 | |||||||||
| Horton Kirby | 9 | 0.004 | 0.014 | 5.8 | 0.07 | 268 | 59 | 19 | 0.10 | 0.0 | 0 | 7.3 | 480 | |||||||||
| Lullingstone | 9 | 0.004 | 0.014 | 5.0 | 0.06 | 257 | 41 | 15 | 0.10 | 0.0 | 1 | 7.3 | 470 | |||||||||
| North Orpington | 8 | 0.007 | 0.015 | 5.5 | 0.06 | 265 | 31 | 15 | 0.10 | 0.0 | 2 | 7.2 | 510 | |||||||||
| Orpington | 4 | 0.009 | 0.016 | 7.0 | 0.08 | 295 | 59 | 18 | 0.10 | 0.0 | 1 | 7.1 | 550 | |||||||||
| Shortlands | 11 | 0.007 | 0.022 | 5.6 | 0.08 | 294 | 83 | 25 | 0.10 | 0.0 | 0 | 7.3 | 540 | |||||||||
| Sundridge | 17 | 0.006 | 0.013 | 4.3 | 0.04 | 222 | 57 | 20 | 0.10 | 0.0 | 2 | 7.5 | 420 | |||||||||
| West Wick ham | 2 | 0.014 | 0.033 | 5.8 | 0.10 | 282 | 52 | 20 | 0.10 | 0.1 | 0 | 7.5 | 530 |