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
Hackney 1970
[Report of the Medical Officer of Health for Hackney]
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| Source of supply | No. of samples | Agar Plate count per ml. after 20-24 hours at 37°C. | Coliform count per cent samples negative in 100 ml. | E. Coli count per cent samples negative in 100 ml. |
|---|---|---|---|---|
| Stoke Newington | 258 | 15. 3 | 100.0 | 100.0 |
| River Thames derived | 3,710 | 8.0 | 99.92 | 99.97 |
| Stoke Newington | River Thames derived | |
|---|---|---|
| Number of samples | 52 | 363 |
| Ammoniacal Nitrogen | 0.008 | 0.026 |
| Albuminoid Nitrogen | 0.061 | 0.083 |
| Nitrate Nitrogen | 5. 2 | 4.8 |
| Oxygen abs. from KMn04 4 hrs. at 27°C | 0.61 | 1.02 |
| Hardness (total) CaCO3 | 305 | 274 |
| Hardness (non-carbonate) CaCO3 | 78 | 79 |
| Magnesium as Mg | 5 | 5 |
| Sodium as Na | 30.9 | 27.7 |
| Potassium as K | 4.9 | 5.6 |
| Chloride as C1 | 45 | 40 |
| Phosphate as PO4 | 1.9 | 2.7 |
| Silicate as SiO2 | 9 | 9 |
| Sulphate as SO4 | 71 | 70 |
| Natural Fluoride as F | 0.20 | 0.20 |
| Surface-active material as Manoxol OT | 0.02 | 0.03 |
| Turbidity units | 0.0 | 0.1 |
| Colour (Burgess units) | 8 | 11 |
| pH Value | 7.9 | 7.9 |
| Electrical Conductivity (microhms) | 620 | 570 |
SWIMMING BATHS
Regular routine samples are taken of the water in the four Public Swimming
baths in the Borough, and no action was necessary in respect of the 15 taken for
chemical and bacteriological examination during the year.
FLUORIDATION
The Council (3/12/69) resolved as follows:-
"That having considered Department of Health and Social Security Circular
8/69 and the request of the Secretary of State to give further consideration
to the fluoridation of water, this Council calls upon the Secretary of State
to recognise the impossibility of securing unanimity among the Health authorities
in the area of the Metropolitan Water Board and requests him to take this matter
out of the local government arena and to introduce legislation to implement the
recommendations contained in the report entitled 'Fluoridation Studies in the
United Kingdom and the Results Achieved after Eleven Years'."