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
Greenwich 1967
[Report of the Medical Officer of Health for Greenwich Borough]
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Water Supply to the London Borough of Greenwich
| Source of supply | BEFORE TREATMENT | AFTER TREATMENT | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Number of samples | Agar plate count per ml. | Coliform count | Escherichia coli count | Agar plate count per ml. | Coliform count | E. coli count | ||||||
| 20-24 hours at 37°C. | 3 days at 22°C. | Per cent, samples negative in 100 ml. | Count per 100 ml. | Per cent, samples negative in 100 ml. | Count per 100 ml. | Number of samples | 20-24 hours at 37°C. | 3 days at 22°C. | Per cent, samples negative in 100 ml. | Per cent, samples negative in 100 ml. | ||
| Thames-deri vcd, South of River | 1,887 | 8.8 | 99.52 | 99.95 | ||||||||
| Bexley | 249 | 0.1 | 4 | 96.39 | 0.3 | 97. 59 | 02 | 265 | 0.0 | 39 | 100.00 | 100. 00 |
| (a) Crayford No. 1 | 128 | 0.0 | 3 | 100.00 | — | 100.00 | — | |||||
| (b) Crayford No. 2 | 133 | 0.2 | 2 | 100.00 | — | 100.00 | — | 255 | 1.3 | 62 | 100.00 | 100.00 |
| (c) Crayford No. 3 | 117 | 0.1 | 41 | 100.00 | — | 100.00 | — | |||||
| Darenth | 247 | 0.0 | 7 | 99.19 | — | 99.60 | — | 253 | 0.2 | 100.00 | 100.00 | |
| Deptford | 250 | 0.3 | 32 | 97.60 | 0.2 | 98.80 | — | 254 | 1.6 | 143 | 99.61 | 100.00 |
| (a) Wansunt No. 1 (b) Wansunt No. 2 | 228 136 | 0.4 0.3 | 37 38 | 100.00 99.26 | — | 100.00 99.26 | — | 255 | 0.1 | 37 | 100.00 | 100.00 |
| Wilmington | 250 | 1.5 | 4 | 98.80 | — | 100.00 | — | 255 | 0.2 | 4 | 99.61 | 100.00 |