Table: Table 15.—Rodent Control
Table 15.—Rodent Control
| 1970 | 1969 |
|---|
| Complaints: | | |
| Complaints of rats received | 517 | 757 |
| Complaints of mice received | 2,193 | 1,652 |
| Total premises involved | 2,710 | 2,409 |
| Infestations treated by Council's staff:(Including properties inspected for reasons other than notification) | | |
| Premises rid of rats | 527 | 795 |
| Premises rid of mice | 2,195 | 1,664 |
| Total premises disinfested | 2,722 | 2,459 |
| Inspections by Public Health Inspectors and visits by Rodent Officers to such places | 3,613 | 3,898 |
| Notices: | | |
| Intimation notices served | — | — |
| Statutory notices served | 2 | 4 |
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Table: Table 16.—Chemical Examination of Water Supplied to City of Westminster—Average ResultsMilligrammes per Litre (unless otherwise stated)
Table 16.—Chemical Examination of Water Supplied to City of Westminster—Average Results
Milligrammes per Litre (unless otherwise stated)
| Analysis Data | Source of Supply |
|---|
| Stoke Newington | R. Thames Derived |
|---|
| Ammoniacal Nitrogen | 0.008 | 0.026 |
| Albuminoid Nitrogen | 0.061 | 0.083 |
| Nitrate Nitrogen | 5.2 | 4.8 |
| Oxygen abs. from KMnO44 hrs. at 27°C | 0.61 | 1.02 |
| Hardness (total) CaCO3 | 305 | 274 |
| Hardness (non-carbonate) Ca CO3 | 78 | 79 |
| Magnesium as Mg | 5 | 5 |
| Sodium as Na | 30.9 | 27.7 |
| Potassium as K | 4.9 | 5.6 |
| Chloride as CI | 45 | 40 |
| Phosphate as PO4 | 1.9 | 2.7 |
| Silicate as Si02 | 9 | 9 |
| Sulphate as SO4 | 71 | 70 |
| Natural Fluoride as F | 0.20 | 0.20 |
| Surface-active material as Manoxal 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 |
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