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 London 1870
[Report of the Medical Officer of Health for London, City of]
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| Names of Water Companies, &c. | Total Solid Matter per gallon. | Common Salt. | Oxygen* required Organic Matter, &c. | Nitrogen. | Hardness. | ||
|---|---|---|---|---|---|---|---|
| As Nitrates &c. | As Ammonia. | Before Boiling | After Boiling. | ||||
| Grains. | Grains. | Grains. | Grains. | Grains. | Degrees | Degrees. | |
| Thames Water Companies | |||||||
| Grand Junction | 19.56 | 1.88 | 0.102 | 0.128 | 0.003 | 14.8 | 3.8 |
| West Middlesex | 18.71 | 1.83 | 0.040 | 0.124 | 0.001 | 14.4 | 3.3 |
| Southwark & Vaux | |||||||
| hall | 19.44 | 1.91 | 0.089 | 0.125 | 0.003 | 14.8 | 3.8 |
| Chelsea | 19.48 | 1.87 | 0.093 | 0.136 | 0.003 | 14.9 | 3.8 |
| Lambeth | 19.79 | 1.79 | 0.082 | 0.123 | 0.003 | 15.0 | 3.8 |
| Other Companies | |||||||
| Kent | 27.69 | 2.56 | 0.010 | 02.15 | 0.000 | 20.7 | 5.7 |
| New River | 19.19 | 1.68 | 0.032 | 0-132 | 0.001 | 14.8 | 3.5 |
| East London | 20.39 | 2.10 | 0.060 | 0-143 | 0.001 | 15.0 | 4.. |
The quantity of solid or rather saline matter dissolved
in the water supplied to London during the
year has ranged, in the case of the Thames supply,
from 18*71 grains per gallon (West Middlesex Company)
to 19-79 grains (Lambeth Company) ; in the
New River Water, which is that chiefly supplied to
the City, it has averaged 19-19 grains per gallon;
in the River Lea water of the East London Company,
20-39 grains ; and in the water from the deep
chalk wells of the Kent Company, it has amounted
to 27-69 grains per gallon, The fluctuations of these