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 1968
[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, 1968
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 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) | (11) | (12) | (13) | (14) | (15) | (16) | (17) | (18) | (19) | (20) | (21) | (22) | (23) |
| All Thames derived | 363 | 0.020 | 0.083 | 3.9 | 1.20 | 280 | 76 | 4 | 23.2 | 5.3 | 32 | 2.0 | 10 | 62 | 0.30 | 0.02 | 0.1 | 14 | 7.9 | 570 | ||
| Eynsford | 8 | 0.005 | 0.026 | 3.8 | 0.10 | 268 | 44 | 18 | 0.15 | 0.0 | 1 | 7.3 | 470 | |||||||||
| Horton Kirby | 8 | 0.009 | 0.023 | 3.8 | 0.10 | 271 | 50 | 19 | 0.15 | 0.0 | 1 | 7.3 | 490 | |||||||||
| Jewels Wood | 3 | 0.014 | 0.014 | 3.7 | 0.03 | 220 | 45 | 20 | 0.10 | 4.7 | 8 | 7.3 | 430 | |||||||||
| Lullingstone | 8 | 0.009 | 0.023 | 3.6 | 0.09 | 258 | 37 | 16 | 0.15 | 0.0 | 1 | 7.3 | 470 | |||||||||
| North Orpington | 7 | 0.006 | 0.024 | 4.3 | 0.10 | 276 | 35 | 15 | 0.15 | 0.0 | 1 | 7.2 | 490 | |||||||||
| Orpington | 4 | 0.009 | 0.026 | 6.1 | 0.12 | 307 | 67 | 18 | 0. 15 | 0.0 | 0 | 7.2 | 520 | |||||||||
| Shortlands | 12 | 0.007 | 0.026 | 4.7 | 0.13 | 290 | 80 | 23 | 0.15 | 0.1 | 0 | 7.2 | 530 | |||||||||
| Sundridge | 15 | 0.009 | 0.019 | 3.0 | 0.06 | 218 | 50 | 20 | 0.15 | 0.0 | 0 | 7.5 | 390 | |||||||||
| West Wickham | 4 | 0.009 | 0.018 | 5.1 | 0.03 | 283 | 51 | 17 | 0.15 | 0.0 | 1 | 7.3 | 510 |