[Report 1946] / Medical Officer of Health, Oswestry Borough.

  • Oswestry (England). Borough Council.
Date:
1946
Catalogue details

Licence: Attribution 4.0 International (CC BY 4.0)

Credit: [Report 1946] / Medical Officer of Health, Oswestry Borough. Source: Wellcome Collection.

    41/82 (page 19)
    19. Presumptive Coliform Reaction ^Present in 50 ml. Absent from 10 ml. Bact, Ooli Type I Present in 100 ml. Absent from 50 ml. CloWelchii fleaction Present in 100 ml. * Absent from 10 ml. * False Presumptive Reaction. This sample is bright in appearance and contains only a trace of matter in suspension. The water is practically neutral in reaction, it is very soft in character, has a low content of alkalinity and a corrosive tendency towards metals would be anticipated. It has a comparatively low content of mineral constituents in solution and it is free from metals apart from a negligible trace of iron. It shows distinct but not excessive colour and is diB satisfactory organic quality for a surface supply. The water shows slight bacterial impurity since Bact. Ooli and 01. Welchii are present in minimal number, but the degree of contamination is not marked. The water should be readily amenable to treatment for the production of a public supply. Sample of water B/W<»/14» Filtered. 1 day at 2 days at 5 days at Ho, of colonies developing 37°C 37°C 20°0 on Agar per cc. or ml. in 1 1 3 Presumptive Ooliform Reaction Present - Absent from 100 ml. Bact, Ooli Present - Absent from 100 ml. 01, welchii Reaction Present in 100 ml. Absent from 10 ml. This sample is clear and bright in appearance. The water is practically neutral in reaction, but it is very soft in character, has a low content of alkalinity and a tendancy to be corrosive towards metals would be anticipated. It has a comparatively low content of mineral constituents in solution and it is free from metals apart from a negligible trace of iron. The water shows distinct but not excessive colour, is of fairly satisfactory organic quality and of a high standard of bacterial purity. The water is considered wholesome in character and suitable for drinking and domestic purposes. Proportion of dwelling houses and population supplied from Public Water mains. (a) Direct to houses 97° 57° (b) By means of standpipes 1*5% The houses without a piped water supply are isolated dwellings on the outskirts of the Town and some considerable distance from