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 1958
[Report of the Medical Officer of Health for Chislehurst]
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| Description of the Sample | Bexley Well | Orpington Well | North Orping-Well | Short-lands No. 1 | Short-lands No. 2 | Short-lands No. 3 | Eynsford Well | Eynsford Bore | Horton Kirby Well | Wilmington No. 1 | Wilmington No. 2 | Darenth Well | Darenth Bore Hole | Thames derived |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Plate Counts (Average per ml.) Colonies counted on Agar: 37° C. (20-24 hours) | 0.1 | 0.1 | 2.9 | 0.1 | 0.1 | 0.1 | 0.4 | 0.1 | 0.4 | 0.7 | 0.5 | 0.3 | 0.1 | - |
| 22° C. (3 days) | 7.5 | 16.0 | 32.2 | 1.9 | 13.0 | 4.0 | 65.5 | 45.7 | 8.3 | 71.1 | 39.8 | 7.8 | 92.0 | — |
| Coliform test. Percentage samples negative in 100 mi.: Coliform | 94.80 | 94.78 | 1.32 | 97.39 | 96.60 | 97.91 | 75.0 | 93.48 | 93.03 | 86.96 | 72.12 | 87.95 | 88.79 | - |
| E. Coliform | 99.26 | 99.60 | 14.54 | 99.13 | 97.96 | 99.16 | 96.25 | 99.28 | 96.31 | 97.52 | 87.61 | 99.20 | 96.73 | — |
| Plate Counts (Average per ml.) Colonies counted on Agar: 37o C. (20-24 hrs.) | 0.1 | 0.1 | 1.8 | 0.1 | 0.1 | 0.1 | 0.1 | 0.03 | 0.3 | 0.1 | 0.1 | 0.1 | 0.1 | 9.7 |
| 22° C. (3 days) | 5.7 | 20.4 | 23.3 | 5.5 | 5.5 | 5.5 | 40.0 | 11.4 | 16.7 | 2.7 | 2.7 | 193.5 | 193.5 | — |
| Coliform test Percentage samples negative in 100 ml.: Coliform | 97.28 | 100.0 | 99.57 | 100.0 | 100.0 | 100.0 | 98.86 100.0 | 99.60 | 99.59 | 99.59 | 100.0 | 100.0 | 99.07 | |
| E. Coliform | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 99.88 |