[Report 1949] / Medical Officer of Health, Spalding R.D.C.

  • Spalding (England). Rural District Council.
Date:
1949
Catalogue details

Licence: Attribution 4.0 International (CC BY 4.0)

Credit: [Report 1949] / Medical Officer of Health, Spalding R.D.C. Source: Wellcome Collection.

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    Deeping St. James Bore. Sample taken from a house in Postland Road, Crowland, on 7th December, 1949. Chemical Results in Parts Per Million. Appearance ; Faint greyish opalescence with a very slight deposit of iron oxide. Tuibidity (Silica Scale) Less than 6 Colour (Hazen) Filtered less than 10 Odour Very faint HydrogenSulplhiiide Reaction p.H. 8.1 Free Carbon Dioxide. 4 Electric Conductivity at 20°C l,600Totai Solids, dried at 180°C 1,070 Alkalinity as Calciiuim Chlorine in Chlorides ... 290 Carbonate 390 Hardness : Total.40 Carbonate (Temporary) 40 Non-oarbonate (Permanent) 0 Nitrogein in Nitrates ... ••• 'OjO Nitrogen in Nitrites ... Less than0.01 Free Ammonia .0.79 Oxygen absorbed in 4 hrs. at 27 °C 0.40 Albuminoid Ammonia. 0,014Residual chlorine. Absent Metals ... Iron 0.86. Other metals absent. Fluorine (F) .3.3 Bacteriological Results Number of Colonies] 1 day at 37 ° C 2 days at 37 ’C 3 days at 20°C developing on Agar | 0 per ml. 0 per ml. 3 per ml. Presumptive Coli- aerogenes Reaction Present in. Absent from. Probable number — ml. 100 ml. 0 per 100 ml. Bact. Coli. (Type 1) . — ml. 100 ml. 0 per 100 ml. Cl. welchii Reaction — ml. 100 ml. This sample has slight opalescence and deposit due to the prescence of iron, and although the turbidity is not marked the amount of iron is objectionable. The water is very faintly alkaline in reaction, soft in character, and has a high content of salinity and mineral constituents in solution. Due to the soft character of the water, the high salinity and the excess of alkalinity over hardness, a corrosive tendency towards metals would be anticipated although no plumbo-solvent action would be expected. The content of Fluorine is greater than that desirable. The water is of very satisfactory organic quality and of the highest standard of bacterial purity, and from these aspects it is considered wholesome in character and suitable for drinking and domestic purposes.