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 1958
[Report of the Medical Officer of Health for Orpington]
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Milligrammes per litre (unless otherwise stated)
| Description of the Sample | Ammonia Nitrogen | Albuminoid Nitrogen | Oxidised Nitrogen | Chlorides as CI. | Oxygen abs. from Permanganate 4 hrs. at 27°C. | Turbidity in terms of Silica | Colour, m.m. brown 2 ft. Tube Burgess's Tintometer | |
|---|---|---|---|---|---|---|---|---|
| Nitrite | Nitrate | |||||||
| Orpington well | Nil | 0.025 | — | 6.9 | 15 | 0.05 | Nil | Nil |
| N. Orpington well | Nil | 0.018 | —— | 5.2 | 14 | 0.07 | Nil | Nil |
| Shortlands No. 1 | Nil | 0.017 | — | 5.1 | 17 | 0.03 | Nil | Nil |
| Shortlands No. 2 | Nil | 0.025 | 5.0 | 16 | 0.03 | Nil | Nil | |
| Shortlands No. 3 | Nil | 0.020 | — | 5.2 | 18 | 0.05 | Nil | Nil |
| Jewels Wood well | Nil | 0.018 | — | 3.4 | 12 | 0.04 | Nil | Nil |
| Sundridge No. 4 well | 0.002 | 0.016 | — | 3.2 | 17 | 0.11 | Nil | Nil |
| Westerham well | 0.006 | 0.018 | — | 4.9 | 14 | 0.10 | Nil | Nil |
| Lullingstone well | 0.002 | 0. 021 | — | 3.3 | 15 | 0.08 | Nil | Nil |
| Eynsford well | 0.002 | 0.030 | — | 4.8 | 17 | 0.08 | 01 | Nil |
| Eynsford bore | 0.003 | 0.020 | — | 3.3 | 15 | 0.06 | Nil | Nil |
| Horton Kirby well | 0.002 | 0.018 | — | 5.0 | 17 | 1.12 | Nil | Nil |
| Thames derived | 0.027 | 0.077 | — | 4.2 | 26 | 1.26 | 0.3 | 12 |
Continued from previous page...
| Description of the Sample | Hardness (Total) | Hardness (non-carbonate) | pH. Value | Phosphate as PO4 | Silicate as SiO4 | Sulphate as so4 | Fluoride as F | Magnesium as Mg. | B.O.D. 5 days at 20°C. | Electrical Conductivity (gemmhos) |
|---|---|---|---|---|---|---|---|---|---|---|
| Orpington well | 272 | 36 | 7.2 | — | — | — | 525 | |||
| N. Orpington well | 260 | 20 | 7.3 | — | — | — | 500 | |||
| Shortlands No. 1 | 278 | 60 | 7.2 | — | — | — | 525 | |||
| Shortlands No. 2 | 278 | 58 | 7.3 | — | — | — | 525 | |||
| Shortlands No. 3 | 284 | 72 | 7.3 | — | — | — | 550 | |||
| Jewels Wood well | 242 | 16 | 7.3 | — | — | — | 450 | |||
| Sundridge No. 4 well | 210 | 42 | 7.4 | — | — | — | 425 | |||
| Westerham well | 262 | 34 | 7.2 | — | — | — | 475 | |||
| Lullingstone well | 242 | 22 | 7.3 | — | — | — | 450 | |||
| Eynsford well | 268 | 40 | 7.3 | — | — | — | 475 | |||
| Eynsford bore | 254 | 32 | 7.3 | — | — | — | 450 | |||
| Horton Kirby well | 262 | 42 | 7.3 | — | _ | — | 500 | |||
| Thames derived | 270 | 66 | 7.9 | 0.85 | 9 | 58 | 0.15 | 5 | — | 550 |