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
Waltham Forest 1967
[Report of the Medical Officer of Health for Waltham Forest]
This page requires JavaScript
- 103 -
OF WATER SUPPLIED TO THE LONDON BOROUGH OF WALTHAM FOREST
| Source of supply | BEFORE TREATMENT | AFTER TREATMENT | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Agar plate count per ml. | Col i form count | Escherichia coli count | Agar plate count per ml. | Coliform count | E. coli count | |||||||
| Number of samples | 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. | |
| Lee Bridge (Lee-derived) | 513 | 29.1 | 99.42 | 100.0 | ||||||||
| Ferry Lane | 157 | 9.1 | 99.36 | 99.36 | ||||||||
| Chingford Mill | 195 | 0.3 | 100.0 | 100.0 | ||||||||
| Thames-derived, North of River | 1,691 | 16.0 | 100.0 | 100.0 | ||||||||
| Coppermill | 48 | 92.4 | 100.0 | 100.0 | ||||||||