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 1956
[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 in terms of Silica | ||
|---|---|---|---|---|---|---|---|---|---|
| Nitrite | Nitrate | ||||||||
| Orpington well | 3 | 0.003 | 0.018 | - | 6.2 | 15 | 0.10 | Nil | |
| N. Orpington new bore hole | 3 | 0.007 | 0.020 | - | 5.3 | 16 | 0.06 | - | |
| N. Orpington No. 1 | 3 | 0.002 | 0.027 | - | 4.7 | 12 | 0.06 | Nil | |
| Jewels Wood well | 4 | 0.005 | 0.025 | - | 3.3 | 11 | 0.06 | Nil | |
| Sundridge well | 5 | 0.003 | 0.020 | — | 3.0 | 17 | 0.06 | Nil | |
| Westerham well | 4 | 0.008 | 0.024 | — | 4.6 | 13 | 0.10 | Nil | |
| Lullingstone well | 4 | 0.005 | 0.019 | — | 3.2 | 15 | 0.04 | 0.2 | |
| Evnsford bore hole | 1 | 0.000 | 0.025 | - | 4.0 | 15 | 0.06 | -_ | |
| Eynsford well | 3 | 0.005 | 0.023 | 3.8 | 14 | 0.06 | Nil | ||
| Short lands No. 1 | 4 | 0.001 | 0.024 | — | 4.8 | 16 | 0.08 | Nil | |
| Shortlands No. 2 | 4 | 0.005 | 0.025 | — | 5.1 | 16 | 0.06 | Nil | |
| Horton Kirby well | 3 | 0.005 | 0.023 | — | 4.5 | 17 | 0.06 | Nil | |
| Thames—derived filtered water | 1598 | 0.036 | 0.086 | — | 4.3 | 30 | 1.16 | 0.3 | |
| Description of the Sample | Colour, null, browr 2 ft. Tube Burgess's Tintometer | Hardness (Total) | Hardness (non-carbonate) | pH. Value | Phosphate as PO4 | Silicate as SIO2 | Sulphates as S04 | B.O.D. 5 days at 20°C. | Electrical Conductivity (gemmhos) |
| Orpington well | Nil | 278 | 48 | 7.1 | — | — | 16 | — | 475 |
| N. Orpington new bore hole | - | 258 | 36 | 7.3 | 8 | - | 425 | ||
| N. Orpington | Nil | 262 | 42 | 7.1 | - | - | 8 | - | 450 |
| No. 1 Jewels Wood well | Nil | 242 | 30 | 7.3 | - | - | 6 | - | 425 |
| Sundridge well | Nil | 208 | 48 | 7.4 | - | - | 28 | - | 350 |
| Westerham well | Nil | 260 | 38 | 7.2 | - | - | 18 | - | 425 |
| Lullingstone well | 1 | 248 | 36 | 7.2 | - | 6 | 400 | ||
| Eynsford bore hole | - | 248 | 42 | 7.3 | - | - | 8 | 400 | |
| Eynsford well | Nil | 260 | 40 | 7.2 | - | - | 12 | - | 400 |
| Shortlands No. 1 | Nil | 282 | 74 | 7.2 | - | - | 40 | - | 475 |
| Shortlands No. 2 | Nil | 282 | 72 | 7.2 | — | — | 40 | — | 500 |
| Horton Kirby well | Nil | 256 | 42 | 7.2 | -- | - | 20 | — | 425 |
| Thames—derived filtered water | 13 | 258 | 72 | 7.7 | 0.90 | 10 | 58 | — | 500 |