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 1969
[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 370C. | Coliform count per cent samples negative in 100 ml. | E. Coli count per cent samples negative in 100 ml. |
|---|---|---|---|---|
| Stoke Newington | 257 | 18.0 | 100.0 | 100.0 |
| River Thames derived | 3, 698 | 12.9 | 99.89 | 100.0 |
| Stoke Newington | All Thames derived | |||
| Number of samples | 53 | 371 | ||
| Ammoniacal Nitrogen | 0.015 | 0. 024 | ||
| Albuminoid Nitrogen | 0.059 | 0.083 | ||
| Nitrate Nitrogen | 4.7 | 4. 4 | ||
| Oxygen abs. from KMnO4 4 hrs. at 27°C | 0. 62 | 1.05 | ||
| Hardness (total) CaC03 | 314 | 282 | ||
| Hardness (non-carbonate) CaC03 | 84 | 79 | ||
| Magnesium as Mg | 5 | 5 | ||
| Sodium as Na | 30.8 | 24.0 | ||
| Potassium as K | 5. 3 | 5. 4 | ||
| Chloride as Cl | 41 | 32 | ||
| Phosphate as PO4 | 1.7 | 2. 1 | ||
| Silicate as SiO2 | 10 | 9 | ||
| Sulphate as SO4 | 68 | 58 | ||
| Natural Fluoride as F | 0. 25 | 0. 25 | ||
| Surface-active material as Manoxol OT | 0.02 | 0.02 | ||
| Turbidity units | 0.0 | 0. 1 | ||
| Colour (Burgess units) | 7 | 11 | ||
| pH Value | 7.9 | 7.9 | ||
| Electrical Conductivity (microhms) | 630 | 550 | ||
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 24 taken
for chemical and bacteriological examination during the year.
FLUORIDATION
Hie Council gave considerable thought to this subject during the year and
it was debated on no fewer than five occasions. The Council was by no means
unanimous in its decisions and the full resolutions on the subject are set-out
below:-
On 23rd June, 1965, the Council resolved
"The question of the fluoridation of drinking water as a protection
against dental decay has already been considered by the former Metropolitan
Borough Councils of Hackney, Shore ditch and Stoke Newington and the three
authorities were in favour of the scheme.