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 1960
[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 THE BOROUGH OF POPLAR DURING I960
MILLIGRAMMES PER LITRE (unless otherwise stated)
| Description of the sample | No. of sampl es | Ammonia Nitrogen | Albuminoid Nitrogen | Oxidised Nitrogen | Chlorides as CI. | Oxygen abs. from Permanganate 4 hours at 27 C | Turbidity units | Colour m. m. brown 2ft. tube Burgess's Tintometer | Hardness (Total) | |
|---|---|---|---|---|---|---|---|---|---|---|
| Nitrite | Nitrate | |||||||||
| Lee Bridge (Lee-derived) | 52 | 0.018 | 0. 097 | 5.0 | 43 | 1.28 | 0.3 | 13 | 324 | |
| Thames-derived -Southern Group | 156 | 0.038 | 0.080 | 4.0 | 28 | 1.26 | 0.3 | 14 | 254 | |
| Description of the sample (cont) | Hardness (non- carbonate) | pH Value | Phosphate as PO. 4 | Silicate as Sio2 | Sulphate as SO4 | Fluoride as F | Magnesium as MG | Surface active material as Manoxol | B. 0. D. 5 days at 20 C | Electrical Conductivity (gemmhos) |
| Lee Bridge (Lee-derived) | 120 | 7.9 | 1. 50 | 8 | 112 | 0.25 | 7 | 0. 17 | 675 | |
| Thames-derived -Southern Group | 68 | 7.8 | 1. 00 | 9 | 58 | 0.25 | 4 | 0. 12 | 525 | |
METROPOLITAN WATER BOARD - WATER EXAMINATION DEPARTMENT BACTERIOLOGICAL RESULTS - YEARLY AVERAGES, 1960
| AFTER TREATMENT | Agar plate count per ml. | Col i form count | E. coli count | ||
|---|---|---|---|---|---|
| Source of supply | Number of sampl es | 20-24 hours at 37 C | 3 days at 22 C | Per cent samples negative in 100 ml. | Percent sampl es negative in 100 ml. |
| Lee Bridge (Lee-derived) | 514 | 25. 2 | 99.61 | 100.0 | |
| Thames-derived -Southern Group | 1,874 | 8.6 | 99.57 | 100.0 | |