[Report 1951] / Medical Officer of Health, Wigan County Borough.

Wigan (England). County Borough Council.

Date:: 1951

Catalogue details

Licence: Attribution 4.0 International (CC BY 4.0)

Credit: [Report 1951] / Medical Officer of Health, Wigan County Borough. Source: Wellcome Collection.

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TYPICAL ANALYSTS REPORT OF WATER SAMPLES TAKEN IN 1951. PHYSICAL BISPHAM— CHARACTERS THIRLMERE NICHOLSON A clear and Colour- A clear and colour¬ less water free from less water free from odour and deposit, odour and deposit. p.H. 7.4 p.H. 7.0 ANALYTICAL REPORTS. Results expressed in parts per 100,000. Total saline matter in solution 44 37.6 Non volatile (mineral) solids • • • • — Toss on ignition (organic and volatile matter) • • • • — Matters in suspension . — .... — Nature of ditto . — _ — Total hardness 2.0 21.0 Temporary hardness 1.6 12.2 Permanent hardness 0.4 8.8 Combined chlorine .... 0.9 2.9 Toxic metals Nil. Nil. Ammoniacal nitrogen Nil. Nil. Albuminoid nitrogen 0.001 0.003 Nitrous nitrogen (nitrites). Nil. Nil. Nitric nitrogen (nitrates) . 0.04 0.16 Oxygen absorbed in 3 hours at 26.7° c. . 0.042 .... 0.021 BACTERIOLOGICAL REPORT. Probable number of coliform bacilli MacConkey 2 days 37° C. (per ioo Ml) Nil. Nil.