[Report 1971] / Medical Officer of Health, Chesterfield Borough.

  • Chesterfield (England). Borough Council.
Date:
1971
Catalogue details

Licence: Attribution 4.0 International (CC BY 4.0)

Credit: [Report 1971] / Medical Officer of Health, Chesterfield Borough. Source: Wellcome Collection.

    36/84 (page 34)
    SANITARY CIRCUMSTANCES IN THE AREA Water Supply Mr. C. H. Crombie, Engineer and Manager of the North Derby- shire Water Board has kindly given me the following report in connection with the water supply to the Borough, for the year 1971. The supplying Authority to the area is the North Derbyshire Water Board. (a) 1. All sources are chlorinated and where necessary more compre- hensive treatment is employed. Distribution is from covered reservoirs. The resultant quality of supplied water is satis- factory. 2. During 1971 the quantity proved adequate for normal house- hold purposes and no restrictions were imposed on the use of hosepipes. (b) Chemical and Bacteriological analyses are carried out in the Board’s Laboratories. All raw, treated and distributed waters are examined at least monthly. The number of analyses carried out in the period under review being:— Bacteriological 788 Chemical 603 Chemical results in view of the number of sources involved vary considerably with location and the approximate extremes of variation are:— pH 7-5 - — 9-0 mg/1 Alkalinity (CaC03) 10 - — 200 mg/1 Hardness (CaC03) 50 - — 200 mg/1 Chloride Cl 10 - — 35 mg/1 Fluoride F 0-1 - — 0-7 mg/1 (c) The treated waters supplied to the area have given rise to no concern on the grounds of plumbo solvency and analyses of the supplies at source, in distribution, and after overnight standing in lead service pipes have yielded figures within the recently revised acceptable concentration for lead. (d) a. The number of houses connected during 1971 was 409. b. 1,624 meters of main were laid for housing developments. Before being brought into service all newly laid mains were washed out, sterilized and samples examined to ensure satisfactory bacteriological and physical results were obtained. No action was necessary in respect of any other form of post treatment contamination. The waters were examined for radioactive substances. Monthly reports of current bacteriological and physical results were forwarded to the Medical Officer of Health.