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
Poplar 1963
[Report of the Medical Officer of Health for Poplar, Metropolitan Borough]
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AVERAGE RESULTS OF THE CHEMICAL EXAMINATION OF WATER SUPPLIED TO BOROUGH OF POPLAR 1963
MILLIGRAMMES PER LITRE (unless otherwise stated)
| description of the sample | no. of samples | ammon1a n1trogen | albumino1d nitrogen | nitrate nitrogen | chlor1des as CL. | oxygen abs. from Permanganate 4 hours at 27°c. | turbidity units | colour m,m, brown 2ft, tube Burgess's tintometer | hardness (total) | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Lee Bridge (lee derived) | 52 | 0.185 | 0.110 | 4.2 | 48 | 1.48 | 13 | 330 | |||||||||
| Thames derived South of river | 156 | 0.079 | 3.8 | 32 | 1.18 | 0.3 | 10 | ||||||||||
| description of the sample (cont.) | hardness (non carbonate) | PH Value | phosphate as po. 4 | sillicate as Si02 | sulphate as s04 | surface active material as manoxol | natural fluoride | magnesium as mg | B.O.D. 5 days at 20°C. | sod1um as Na | potassium as K | Electrical conducti v1ty mlcromhos | |||||
| Lee Bridge (lee derived) | 100 | 2.3 | 108 | 0.35 | 38 | 7.8 | 700 | ||||||||||
| Thames derived south of river | 7.8 | 1.3 | 0.25 | 5 | 25 | 5.2 | 550 | ||||||||||
METROPOLITAN WATER BOARD-WATER EXAMINATION DEPARTMENT BACTERIOLOGICAL RESULTS-YEARLY AVERAGES, 1963
| AFTER TREATMENT | agar plate count per ml. | coliform count | E.coli count | ||
|---|---|---|---|---|---|
| source of supply | 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) | 521 | 42.9 | 99.42 | 99.42 | |
| Thames derived south of river | 1 ,873 | 12.5 | 99.41 | 99.47 | |