London's Pulse: Medical Officer of Health reports 1848-1972
View report page
Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London
Greenwich 1969
[Report of the Medical Officer of Health for Greenwich Borough]
This page requires JavaScript
METROPOLITAN WATER BOARD—Water Examination Department
Bacteriological Results—Yearly averages, 1969, of Water Supplied 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 | Number of samples | 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. | 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-derived, | 8,196 | 66.5 | - | 39.79 | 19.0 | 53.97 | 7.0 | 3,698 | 12. 9 | - | 99.89 | 100.0 |
| Bexley Well | 249 | 0.2 | 4 | 99. 20 | - | 100.0 | - | 253 | 15. 6 | 97 | 100.0 | 100.0 |
| (a) Crayford No. 1 | 146 | 0. 1 | 5 | 99. 32 | - | 100.0 | - | 253 | 20.9 | 139 | 100.0 | 100.0 |
| (b) Crayford No. 2 | 145 | 0. 1 | 134 | 99. 31 | - | 100.0 | - | |||||
| (c) Crayford No. 3 | 113 | 0.0 | 15 | 100.0 | - | 100.0 | - | |||||
| Darenth Well | 250 | 0. 1 | 13 | 100.0 | - | 100. 0 | - | 251 | 0.0 | 3 | 100. 0 | 100.0 |
| Deptford Well | 248 | 0.2 | 6 | 98. 39 | 0. 1 | 99 .19 | - | 251 | 0.3 | 95 | 100. 0 | 100.0 |
| (a) Wansunt No. 1 | 216 | 2.3 | 96 | 99. 07 | - | 100.0 | - | 252 | 0. 1 | 49 | 100.0 | 100.0 |
| (b) Wansunt No. 2 | 234 | 0.6 | 48 | 100.0 | - | 100.0 | - | |||||
| Wilmington Well | 238 | 0.5 | 46 | 98.74 | - | 99. 58 | - | 242 | 0 .1 | 3 | 100.0 | 100.0 |