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
Southwark 1971
[Report of the Medical Officer of Health for Southwark, Borough of]
This page requires JavaScript
METROPOLITAN WATER BOARD.TER EXAMINATION DEPARTMENT
AVERAGE RESULTS OF THE CHEMICAUMINATION OF WATER SUPPLIED TO
THE LONDON BOROUG1 SOUTHWARK
| Description of the Sample | Number of Samples | Ammoniacal Nitrogen | Albuminoid Nitrogen | Nitrate Nitrogen | Oxygen abs. from KMn04 4 hrs at 27°C | B.O.D. 5 days at 20°C | Hardness (total) CaC03 | Hardness (non-carbonate) CaC03 | Mag nesiutm as M | Potassium as | Chloride as CL | Phosphate as PO4 | Silicate as Si02 | Sulphate as SO4 | Natural Fluoride as F | Surface-active material as Manoxol OT | Turbidity units | Colour (Burgess units) | pH value | Electrical Conductivity (micromhos) | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) | (12) | (13) | (14) | (15) | (16) | (17) | (18) | (19) | (20) | (21) | (22) | (23) |
| River Thames- derived | 364 | 0.029 | 0.084 | 6.1 | 1.04 | - | 281 | 90 | 55 | 5.1 | 34 | 2.3 | 10 | 64 | 0.15 | 0.02 | 0.1 | 13 | 7.8 | 580 | |
| Honor Oak | 3 | 0.065 | 0.011 | 0.2 | 0.05 | - | 293 | 53 | 15 | 0.45 | 0.0 | 6 | 7.2 | 530 |
| Source of Supply | BEFORE TREATMENT | AFTER TREATMENT | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Number of samples | Agar plate count per ml. | Coliform count | Escherichia coli count | 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. | cent. Counples perative 100 in 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. | ||||
| River Thames-derived | 8,154 | 53.9 | 40.37 | 12.2.91 | 5.1 | 3,901 | 8.4 | 99.51 | 99.97 | ||||
| Honor Oak | 62 | 0.0 | 7 | 87.10 | 0.4.71 | 0.2 | 63 | 0.2 | 19 | 100.0 | 100.0 | ||
44
45