[Report 1920] / Medical Officer of Health, Shrewsbury Borough.

  • Shrewsbury (England). Borough Council.
Date:
1920
Catalogue details

Licence: Attribution 4.0 International (CC BY 4.0)

Credit: [Report 1920] / Medical Officer of Health, Shrewsbury Borough. Source: Wellcome Collection.

    22/70 (page 20)
    After filtration and chlorination, the water is pumped to a reservoir which supplies the town for general purposes. This treatment has been very satisfactory, and the accompany¬ ing table shows the results of bacteriological analysis before and after treatment. Date of collection : 21 December, 1920. Quantity of water used in each case : 1 c.c Culture Medium. Description of Water. No. of Colonies at end of 24 hours 48 hours 72 hours Agar River, before filtra- 26 64 no tion MacConkey Ditto 1 red 3 reds 14 reds 3 whites 3 whites Agar River, after filtration 20 40 50 MacConkey Ditto 0 2 reds 2 reds Agar River with Chloros added 3 6 12 MacConkey Ditto 0 0 0 Agar Tap 1 3 4 MacConkey Ditto 0 0 0 Agar Conduit 0 0 4 MacConkey Ditto 0 0 0 Agar Control 0 0 0 MacConkey Ditto 0 0 0 Many people, probably through ignorance or laziness, are accustomed to drinking the river water, and it is therefore gratifying to know that this water, after treatment, is of such a high bacterial standard.