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
Chislehurst 1952
[Report of the Medical Officer of Health for Chislehurst]
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| Orpington Well | North Orpington Well | Short-lands Well | Eyns-ford Well | Bexley Well | Wilmington Well | Darenth Well | Thames derived filtered water | |
|---|---|---|---|---|---|---|---|---|
| Number of samples Plate Count (Average per milli-litre) Colonies counted on | 253 | 252 | 273 | 380 | 261 | 255 | 251 | 3,430 |
| Agar— 22° C. (3 days) | 896.5 | 37.0 | 5.7 | 344.3 | 10.9 | 33.3 | 1.2 | - |
| 37° C. (20.24 hrs.) | 35.0 | 3.3 | 0.5 | 1.8 | 0.6 | 1.2 | 0.1 | 17.5 |
| Bact. coli test— Percentage of samples negative in 100 ml. | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 99.6 | 99.8 |
| Average number of Bact. coli per 100 ml. | — | — | — | — | — | — | 0.004 | 0.005 |
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