Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London
[Report of the Medical Officer of Health for Lewisham Borough]
This page requires JavaScript
AVERAGE RESULTS OF THE CHEMICAL EXAMINATION OF WATER SUPPLIED TO THE LONDON BOROUGH OF LEWISHAM DURING 1972
Milligrammes per litre (unless otherwise stated)
Description of the Sample | Number of Samples | Ammoniacal Nitrogen | Albuminoid Nitrogen | Nitrate Nitrogen | Oxygen abs from KMn04 4 hrs at 27°C | BOD 5 days at 20°C | Hardness (total) CaC03 | . Hardness (non-carbonate) CaC03 | Magnesium as Mg | Sodium as Na | Potassium as K | Chloride as CI | Phosphate as P04 | Silicate as Si02 | Sulphate as S04 | Natural Fluoride as F | Surface-active material as Manoxol OT | C02 | Turbidity units | Colour (Burgess units) | pH value | Electrical Conductivity (micromhos) |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) | (11) | (12) | (13) | (14) | (15) | (16) | (17) | (18) | (19) | (20) | (21) | (22) | (23) |
River Thames - derived | 364 | 0.031 | 0.069 | 6.9 | 1.06 | - | 274 | 32 | 5.0 | 24.5 | 5.5 | 35 | 2.8 | 10 | 58 | 0.15 | 0.02 | - | 0.1 | 13 | 7.9 | 570 |
Bexley | 4 | 0.007 | 0.016 | 7.1 | 0.14 | - | 320 | 76 | 4.0 | 34 | - | 23 | - | - | - | 0.11 | - | 34 | 0.0 | 3 | 7.1 | 580 |
Darenth | 4 | 0.000 | 0.015 | 5.9 | 0.12 | - | 268 | 43 | 2.8 | 31 | - | 17 | - | - | - | 0.11 | - | 31 | 0.1 | 2 | 7.3 | 500 |
Deptford | 4 | 0.007 | 0.014 | 8.2 | 0.10 | - | 378 | 144 | 8.5 | 36 | - | 48 | - | - | - | 0.15 | - | 36 | 0.0 | 2 | 7.2 | 750 |
Merton | 1 | 0.070 | 0.016 | 0.5 | 0.04 | - | 244 | 24 | 13.0 | - | - | 23 | - | - | - | 0.40 | - | - | 1.3 | 22 | 7.3 | 450 |
Wilmington | 4 | 0.006 | 0.015 | 9.5 | 0.26 | - | 290 | 53 | 3.5 | 33 | - | 25 | - | - | - | 0.10 | - | 33 | 0.0 | 1 | 7.2 | 550 |