London's Pulse: Medical Officer of Health reports 1848-1972
View report page
Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London
Enfield 1965
[Report of the Medical Officer of Health for Enfield]
This page requires JavaScript
WATER SUPPLY
| North Minims Pumping Station with Coagulation/Filtration Plant | |||
|---|---|---|---|
| Average Results in Milligrammes per litre where applicable | |||
| Raw Maximum | Raw Minimum | Treated Average | |
| PH | 7.3 | 6.9 | 7.0 |
| Burgess Colour | 20 | 0 | 0 |
| Turbidity | 28 | 2 | 0 |
| Total Solids | 545 | 400 | 445 |
| Free C02 | 50 | 26 | 44 |
| Nitrate Nitrogen | 20.0 | 3.0 | 6.4 |
| Nitrate Nitrogen | 0.01 | 0.00 | 0.01 |
| Ammoniacal Nitrogen | 0.16 | 0.00 | 0.01 |
| Aluminoid Nitrogen | 0.17 | 0.00 | 0.04 |
| Oxygen Absorbed | 2.60 | 0.50 | 0.70 |
| Carbonate Hardness | 255 | 145 | 195 |
| Non.Carbonate Hardness | 220 | 60 | 130 |
| Calcium | 134 | 109 | 109 |
| Magnesium | 12.5 | 1.0 | 5.8 |
| Sodium | 440 | 15.3 | 20.3 |
| Potassium | 7.2 | 4.3 | 5.3 |
| Chloride | 69 | 25 | 38 |
| Fluoride | 0.2 | 0.2 | 0.2 |
| Sulphate | 148 | 62 | 100 |
| Carbonate | 154 | 86 | 114 |
| Phosphate | 0.90 | 0.12 | 0.05 |
| Silica | 17 | 8 | 10 |
| Iron | 0.40 | 0.02 | 0.02 |