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
Croydon 1931
[Report of the Medical Officer of Health for Croydon]
This page requires JavaScript
The 302 samples of ordinary milk contained total bacteria per c.c. as follows:—
| 0—1,000 | 4 |
| 1,000—5,000 | 24 |
| 5,000—10,000 | 25 |
| 10,000—20,000 | 30 |
| 20,000—30,000 | 33 |
| 30,000—40,000 | 22 |
| 40,000—50,000 | 20 |
| 50,000—100,000 | 57 |
| 100,000—150,000 | 18 |
| 150,000—200,000 | 9 |
| 200,000—250,000 | 8 |
| 250,000—500,000 | 16 |
| 500,000—750,000 | 12 |
| 750,000—1,000,000 | 5 |
| 1,000,000—2,000,000 | 6 |
| Over 2,000,000 | 13 |
There is no standard fixed for total bacteria per c.c. in ordinary
commercial milk, but comparing the results with the Grade A
standard, i.e., 200,000 per c.c., it will be seen that 242 of the
samples contained total bacteria in accordance with that standard.
It has to be remembered that a proportion of this milk has been
subjected to commercial pasteurisation.
The 302 samples taken under the Milk and Dairies (Consolidation)
Act, 1915, were samples of milk which had been produced
in the following areas:—