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
Lambeth 1967
[Report of the Medical Officer of Health for Lambeth Borough]
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EXAMINATION OF WATER SUPPLY Bacteriological Results — Yearly Averages 1967
| Source of supply | BEFORE TREATMENT | ||||||
|---|---|---|---|---|---|---|---|
| Number of samples | Agar plate count per ml. | Coliform count | Escherichia coli count | ||||
| 20-24 hours at 37° C. | 3 days at 22°C. | Per cent. samples negative in 100ml. | Count per 100ml. | Per cent. samples negative in 100ml. | Count per 100ml. | ||
| Hampton | |||||||
| River Thames, South of River | |||||||
| Honor Oak well | 54 | 0.0 | 1 | 100.0 | - | 100.0 | - |
AFTER TREATMENT
| Source of supply | 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. | Per cent. samples negative in 100 ml. | ||
| Hampton | 1,158 | 7.3 | 99.91 | 100.0 | |
| River Thames, South of River | 1,887 | 8.8 | 99.52 | 99.95 | |
| Honor Oak well | 54 | 0.0 | 1 | 100.0 | 100.0 |
Lead content (mg/l Pb) water from main taps
in consumers' premises
Number of samples Per cent
Less than 0.01 64 66.7
0.01 22 22.9
0.02 3 3.1
0.03 4 4.2
0.04 2 2.1
0.05 0 -
0.06 1 1.0
96 100.0
The above figures apply to the whole of the Board's area but it should be pointed
out that the general characteristics of the water are similar throughout the area so
that the findings are applicable to individual Boroughs.