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
Feltham 1949
[Report of the Medical Officer of Health for Feltham]
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9
Water Co. In addition seven samples were taken by my
department. There is an arrangement between my
Council and the Councils of the following districts:
Hayes and Harlington
Windsor
Egham
Bagshot
Easthampstead
by which the water supplied by the South West Suburban
Water Company to the combined districts is
sampled twenty-five times a year on a rota.
Average Results of Analyses of Metropolitan Water
Board Supply. (Parts per million.) Water filtered
and chlorinated at Hampton Works:
| No of Samples | 250 |
| Ammoniacal Nitrogen | .015 |
| Albuminoid Nitrogen | .087 |
| Oxidised Nitrogen (Nitrate) | 4.3 |
| Chlorides as Cl. | 27.4 |
| Oxygen abs. from Permanganate 3 hours at 80°F | 1.13 |
| Turbidity in terms of Silica | 0.4 |
| Colour m.m. brown 2 ft. tube Burgess's Tintometer | 14 |
| Hardness Total | 244 |
| Hardness (Permanent) | 71 |
| pH Value | 7.7 |
| Conductivity | 450 |
| No. of Samples | 980 |
| Colony Count on agar at 37°C (20-24 hrs.) | 7.5 |
| BACT. COLI TEST | |
| Percentage of samples negative per 100 ml. | 99.7 |
| Bact. coli per 100 ml. | .006 |