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
Tottenham 1952
[Report of the Medical Officer of Health for Tottenham]
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'28
Average Results of the Chemical and Bacteriological Examinations of the Water Supplied to the Borough of Tottenham for the Year 1952
Parts per Million (Unless otherwise stated)
| Description of the Sample | No. of Samples | Ammoniacal Nitrogen | Albuminoid Nitrogen | Oxidised Nitrogen | Chlorides as CI. | Oxygen at from Permanganate 3hrs at 27ºc | Turbidity in Terms of Silica | Colour, m. m brown 2ft. Tube Burgess's Tintometer | Hardness (Total) | Hardness (Non-carbonate) | PH. Value | Phosphate as P.O. 111 4 | Silica as Sio2 | Conductivity | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| New River water filtered at Hornsey works | 240 | 0.038 | 0. 072 | 6.2 | 36.4 | 0. 66 | 0. 1 | 7 | 302 | 78 | 7.7 | 0. 36 | 13 | 600 | ||
| New River water filtered at Stoke New-ington works | 243 | 0.038 | 0.075 | 6.1 | 36.5 | 0.68 | 0. 1 | 7 | 300 | 75 | 7.8 | 0.35 | 13 | 600 | ||
| River Thames water filtered ,at Walton works | 245 | 0.032 | 0.096 | 4.3 | 25.3 | 1.18 | 0.2 | 13 | 252 | 60 _ | 7.8 | 0. 34 | 11 | 475 | ||
| Bacteriological Results | ||||||||||||||||
| Description of Sample | No. of microbes per ml. Colonies counted on agar after 20- 24 hrs. at 37°C. | Bact. coli Test | ||||||||||||||
| Percentage of samples negative to Bact. coli in 100 ml. | Bact. coli per 100 ml. | |||||||||||||||
| New River water filtered at Hornsey works | 17.4 | 100.0 | Nil | |||||||||||||
| New River water filtered at Stoke Newington works | 27.3 | 100.0 | Nil | |||||||||||||
| River Thames water fil-tered at Walton works | 15. 9 | 99.6 | 0.008 | |||||||||||||