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
Orpington 1962
[Report of the Medical Officer of Health for Orpington]
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Milligrammes per litre (unless otherwise stated).
| Description of the Sample | No. of Samples | Ammonia Nitrogen | Albuminoid Nitrogen | Oxidised Nitrogen | Chlorides as CI. | Oxygen abs. from Permanganate 4 hrs. at 27°C. | Turbidity units | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Nitrite | Nitrate | ||||||||||||||
| Sundridge | 4 | 0.018 | 0.020 | 3 0 | 18 | 0.08 | 0.3 | ||||||||
| Lullingstone | 7 | 0.014 | 0.022 | 2-9 | 14 | 0.06 | Nil XTil | ||||||||
| Eynsford | 8 | 0.013 | 0.026 | 3-7 | 16 | 0.04 | Nil | ||||||||
| Horton Kirby | 8 | 0.015 | 0.027 | 4-2 | 18 | 0.10 | Nil | ||||||||
| Orpington | 4 | 0.014 | 0.020 | 6-4 | 15 | 0.08 | 01 | ||||||||
| North Orpington | 7 | 0.013 | 0.021 | 3-9 | 14 | 0.06 | 0.2 | ||||||||
| Description of the Sample | Colour, mm. brown 2 ft. Tube Burgess's Tintometer | Hardness (Total) | Hardness (non-carbonate) | pH Value | Phosphate as po4 | Silicate as Si02 | Free C02 | B.O.D. 5 days at 20°C | Electrical Conductivity (micromhoe) | ||||||
| Sundridge | Nil | 230 | 42 | 7-4 | 440 | ||||||||||
| Lullingstone | Nil | 254 | 22 | 7-2 | 460 | ||||||||||
| Evnsford | Nil | 264 | 28 | 7-3 | 470 | ||||||||||
| Horton Kirby | Nil | 264 | 36 | 7-3 | 490 | ||||||||||
| Orpington | Nil | 286 | 34 | 7-2 | 520 | ||||||||||
| North Orpington | 2 | 266 | 20 | 7-2 | 480 | ||||||||||