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 1957
[Report of the Medical Officer of Health for Orpington]
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Average Results of the Chemical Examination of the Water supplied to Orpington during the Year 1957.
Milligrammes per litre (unless otherwise stated)
| Description of the Sample | No. of Samples | Ammonia Nitrogen | Albuminoid Nitrogen | Oxidised Nitrogen | Chlorides as Cl | Oxygen abs. from Permanganate 4 hrs. at 27°C. | Turbidity in terms of Silica | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Nitrite | Nitrate | |||||||||||||||
| Orpington well | 5 | 0 002 | 0.018 | — | 5.8 | 15 | 0.08 | Nil | ||||||||
| N. Orpington well | 4 | 0 002 | 0.019 | — | 4.4 | 13 | 0.08 | Nil | ||||||||
| Jewels Wood well | 5 | 0. 005 | 0.018 | — | 2.7 | 12 | 0.06 | Nil | ||||||||
| Sundridge No. 2 well | 4 | 0.001 | 0.021 | — | 2.5 | 18 | 0.07 | Nil | ||||||||
| Westerham well | 4 | Nil | 0.014 | — | 4.3 | 16 | 0.10 | Nil | ||||||||
| Lullingstone wel | 4 | Nil | 0.015 | — | 2.7 | 17 | 0.05 | Nil | ||||||||
| Eynsford bore | 4 | 0.001 | 0.019 | — | 3.3 | 16 | 0.06 | Nil | ||||||||
| Eynsford well | 4 | 0.001 | 0.020 | — | 3.2 | 16 | 0.10 | 0.2 | ||||||||
| Shortlands No. 1 | 3 | 0.005 | 0.026 | — | 4.3 | 17 | 0.03 | Nil | ||||||||
| Shortlands No. 2 | 2 | 0.002 | 0.010 | — | 4.5 | 18 | 0.02 | Nil | ||||||||
| Horton Kirby well | 2 | 0.005 | 0.023 | — | 4.5 | 17 | 0.05 | 0.3 | ||||||||
| Thames derived | 1882 | 0.027 | 0.074 | — | 3.9 | 29 | 1.16 | 0.3 | ||||||||
| Description of the Sample | Colour, m.m. brown 2 ft. Tube Burgess's Tintometer | Hardness (Total) | Hardness (non-carbonate) | pH. Value | Phosphate as po4 | Silicate as SiO2 | B.O.D. 5 days at 20°C. | Electrical Conductivity (gemmhos) | ||||||||
| Orpington well | Nil | 272 | 30 | 7.2 | — | — | — | 525 | ||||||||
| N. Orpington well | Nil | 258 | 21 | 7.3 | — | — | — | 475 | ||||||||
| Jewels Wood well | Nil | 240 | 16 | 7.3 | — | — | — | 450 | ||||||||
| Sundridge No. 2 well | Nil | 205 | 38 | 7.4 | — | — | — | 425 | ||||||||
| Westerham well | Nil | 264 | 28 | 7.3 | — | — | — | 500 | ||||||||
| Lullingstone well | Nil | 241 | 15 | 7.2 | — | — | — | 450 | ||||||||
| Eynsford bore | Nil | 250 | 24 | 7.3 | — | — | — | 475 | ||||||||
| Eynsford well | Nil | 256 | 24 | 7.2 | — | — | — | 475 | ||||||||
| Shortlands No. 1 | Nil | 275 | 54 | 7.2 | — | — | — | 525 | ||||||||
| Shortlands No. 2 | Nil | 278 | 57 | 7.3 | — | — | — | 525 | ||||||||
| Horton Kirby well | Nil | 250 | 38 | 7.3 | — | — | – | 475 | ||||||||
| Thames derived | 11 | 260 | 56 | 7.9 | — | — | — | 550 | ||||||||