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 1965
[Report of the Medical Officer of Health for Waltham Forest]
This page requires JavaScript
- 89 -
BACTERIOLOGICAL RESULTS - YEARLY AVERAGES, 1965
OF WATER SUPPLIED TO THE LONDON BOROUGH OF WALTHAM FOREST
Source of supply
BEFORE TREATMENT
AFTER TREATMENT
Agar plate count
per ml.
Coliform 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)
514
31.4
99.81
100.0
Ferry Lane
236
22.3
100.0
100.0
Chingford Mill
246
2.5
4
99.59
—
100.0
—
250
0.1
1
100.0
100.0