[Report 1950] / Medical Officer of Health, Blackpool County Borough.

  • Blackpool (England). County Borough Council.
Date:
1950
Catalogue details

Licence: Attribution 4.0 International (CC BY 4.0)

Credit: [Report 1950] / Medical Officer of Health, Blackpool County Borough. Source: Wellcome Collection.

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    Summary of Bacteriological Analyses of Raw Water from Hodder Works Aerobic micro-organisms Probable no. growing in yeastrel agar of coli-aero- genes per 100 ph Value of No. of colonies per ml. of ml. of water Date sample taken sample water (McCrady) in 2 davs in 3 days at 37°C at 22°C 25th Jan., 1950 6-90 9 159 8 10th Feb., 1950 6-90 5 2960 35 21st Mar., 1950 fi-90 22 196 11 5th May, 1950 0-95 2 430 17 27th June, 1950 7-05 3 123 50 22nd July, 1950 0-95 3 510 350 24th Aug., 1950 7-05 20 392 250 13th Sept., 1950 ... 6-90 8 668 600 27th Oct., 1950 7-0 4 111 8 9th Dec., 1950 6-90 6 560 25 Summary of Bacteriological Analyses of Filtered Water Before Chlorination from Hodder Works Date sample taken ph Value of sample Aerobic micro-organisms growing in yeastrel agar Probable no. of coli-aero- genes per 100 ml. of water (McCrady) No. of coloni V in 2 days at 37°C es per ml. of rater in 3 davs at 22°C 10th Feb., 1950 9-20 2 11 I 15th Feb., 1950 6-40 1 7 0 21st Mar., 1950 9-40 1 3 1 5th May, 1950 9-05 0 2 0 27th June, 1950 8-80 1 3 0 22nd July, 1950 9-00 1 5 0 24th Aug., 1950 8-90 3 72 5 13th Sept., 1950 ... 9-10 1 29 2 27th Oct., 1950 8-50 0 14 0 9th Dec., 1950 8-90 1 8 0 Summary of Bacteriological Analyses of Filtered Water Before Chlorination from Barnacre Works Date sample taken ph Value of sample Aerobic micro-organisms growing in yeastrel agar Probable no. of coli-aero- genes per 100 ml. of water (McCrady) No. of colonies per ml. of water in 2 days at 37°C in 3 days at 22°C 19th Jan., 1950 9 -10 1 3 0 21st Feb., 1950 9-10 3 7 0 loth March, 1950 ... 9-10 2 7 0 18th May, 1950 91 1 112* 0 27th June, 1950 9-15 0 3 0 5th Aug., 1950 910 1 4 0 27th Sept. 1950 ... 910 0 3 0 4th Dec., i950 915 1 3 0 * Alumina injection turbines had just been adjusted and colour of Filtered Water had gone off—also purity.