[Report 1959] / Medical Officer of Health, Benfleet U.D.C., Canvey Island U.D.C., Rayleigh U.D.C., Rochford R.D.C. (South East Essex).
- Benfleet (England). Urban District Council.
- Date:
- 1959
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: [Report 1959] / Medical Officer of Health, Benfleet U.D.C., Canvey Island U.D.C., Rayleigh U.D.C., Rochford R.D.C. (South East Essex). Source: Wellcome Collection.
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![WATER ANALYSIS Rc]iort Ly the Coxinties Public Health Laboratories on a sample of water taken from tap in garage at the Head Office of the Soutliend Waterworks Com])any on 2brd March, 1959. Chemical results in parts per million A])pearance Brigiit and clear Alkalinity as Calcium Turbidity Nil Carbonate 55 Colour 6 Nitrate Nitrogen 6.4 Odour . . Slightly earthy Nitrite Nitrogen less than 0.01 Reaction of pH 8.7 Ammonia cal Nitrogen 0.091 Free Carbon Dioxide . . Absent Albuminoid Nitrogen 0.046 Electric Conductivity 670 Chlorine present as Dissolved solids dried Chloride .. 88 at 180°C 445 Residual Chlorine at Hardness— time of sampling 0.20 Total 115 Oxygen absorbed 0.60 Carbonate . . 55 Metals—iron, zinc. Non-carbonate 60 copper and lead . . Absent Bacteriological Results 1 day at 37°C. 2 days at 37°C'. 3 days at 37°C. Number of colonies developing on Agar . . . . . . 1 per ml. 1 per ml. 1 per ml. Presumptive Coliform Re- action Bact. coli. (Type I) . . Cl. welchii Reaction . . Present in Absent from Probable number — ml. 100 ml. 0 per 100 ml. — ml. 100 ml. 0 per 100 ml. — ml. 100 ml. This sample is clear and bright in appearance, has a reaction on the alkaline side of neutrality and is free from metals. The hardness of the water is very moderate and it contains no excess of mineral or saline constituents in solution. Its organic cpiality and bacterio- logical purity are of a high standard. These are satisfactory results, indicative of a pure and wholesome water suitable for drinking and domestic purposes. 2nd April, 1959. (Sgd.) ROY C. HOATHER](https://iiif.wellcomecollection.org/image/b28917200_0031.jp2/full/800%2C/0/default.jpg)
