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
City of Westminster 1969
[Report of the Medical Officer of Health for Westminster, City of]
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Table 17.—Rodent Control
| 1969 | 1968 | |
|---|---|---|
| Complaints of rats received | 757 | 777 |
| Complaints of mice received | 1,652 | 1,206 |
| Total premises involved | 2,409 | 1,983 |
| Premises rid of rats | 795 | 824 |
| Premises rid of mice | 1,664 | 1,226 |
| Total premises disinfested | 2,459 | 2,050 |
| Inspections by Public Health Inspectors and visits by Rodent Officers to such places | 3,898 | 3,670 |
| Intimation notices served | _ | _ |
| Statutory notices served | 4 | 5 |
Table 18.—Chemical Examination of Water Supplied to City of Westminster—Average Results Milligrammes per Litre (unless otherwise stated)
| Analysis Date | Source of Supply | |
|---|---|---|
| Stoke Newington | R. Thames Derived | |
| Ammoniacal Nitrogen | 0.015 | 0.024 |
| Albuminoid Nitrogen | 0.059 | 0.083 |
| Nitrate Nitrogen | 4.7 | 4.4 |
| Oxygen abs. from Permanganate 4 hrs. at 27°C. | 0.62 | 1.05 |
| Hardness (total) | 314 | 282 |
| Hardness (non-carbonate) | 84 | 79 |
| Magnesium as Mg | 5 | 5 |
| Sodium as Na | 30.8 | 24.0 |
| Potassium as K | 5.3 | 5.4 |
| Chloride as CI | 41 | 32 |
| Phosphate as PO4 | 1.7 | 2.1 |
| Silicate as Si02 | 10 | 9 |
| Sulphate as SO4 | 68 | 58 |
| Natural Fluoride as F | 0.25 | 0.25 |
| Surface active material as Manoxol | 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 |