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 Erith]
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41
SECTION E—WATER SUPPLY—MILK—FOOD AND
DRUGS ACT—FOOD INSPECTION
E(l) Water Supply
The water supply in the district is supplied by the Metropolitan
Water Board and contains 30.8 degrees of hardness,
Almost without exception, the supply is led direct into
the premises served.
Two monthly samples have been forwarded to the appropriate
Laboratory for examination with satisfactory results.
One chemical sample was submitted, result of which is as
follows :—
Report on Chemical Water Sample
Source Town supply
Received on 20th October, 1954.
Physical characters Clear
Odour None
Deposit None pH 7.55
Chemical examination
Solids in suspension —
Solids in solution (Dried at 180°C) 417
Solids in solution (After ignition) 382
Chlorides calculated as Chlorine 24
Free & Saline Ammonia (As Nitrogen) None
Albuminoid Ammonia (As Nitrogen) None
Nitric Nitrogen (Nitrates) 5-0
Nitrous Nitrogen (Nitrites) None
Oxygen absorbed in \ hour @ 26.7°C 0.03
Oxygen absorbed in 4 hours @ 26.7°C 0.07
Toxic Metals Not detected
Free & Combined residual Chlorine on receipt Not detected
Hardness : Bicarbonate alkalinity 245 : Total 340.
The water is of satisfactory organic quality and, on the
above chemical analysis should be fit for drinking.
(signed) H. E. Monk, B.Sc., F.R.I-C-,
County Analyst.