[Report 1968] / Medical Officer of Health, Chorley Borough.

  • Chorley (England). Borough Council
Date:
1968
Catalogue details

Licence: Attribution 4.0 International (CC BY 4.0)

Credit: [Report 1968] / Medical Officer of Health, Chorley Borough. Source: Wellcome Collection.

    26/74 (page 22)
    -22- S AN IT ARY CIRCLJriST/iNCl!]S OF THE /iREil Water Supply ’ • The town is supplied with water from the Liverpool Corporcitioa Water Works at Rivington, the Chorle^ supply coming from the filter beds at 'The Nab'. The water is soft upland surface water, v/hich is chlorinated and treated by the soda ash process prior to distribution. There were 11,124 houses in the Borough on mains water supply at the end of the year, the remaining 7 teing outlying farms and cottages. During the year water supplies were extended to new houses in Gillibrand Estate, Fark Cottages Estate, Eagganley Estate,Bur Lane, Bolton Road. V/eekly bacteriological and periodical chemical analyses are carried out by the liverpool Corr'oration who forward copies of the results to the Public Health Department. The results are invariably satisfactory. In addition the Department took thirty samples for bacteriological excunination and two samples for chemical, analysis which were found to be satisfactory. Typical results of chemical samples are as follows;- Source of Sample: Chorley Treated Water. (a) Physical Examination of water, colourless. (b) Chemical Examination: Reaction, pH 7*3 Results expressed in parts per million: Total Solids in Solution Oxygen absorbed from Permanganate in 15 mins in 3 hours ' ... Ammonia .... Albuminoid Ammonia ' ... ... - Nitrogen as Tlitrates • Nitrogen as Nitrites Combined Chlorine Free Chlorine Total Hardness (as Ca C05) Carbonate Hardness (as Ca c03) Lead ... Co’-por Zinc Total Iron Ap'rarent Colour 96 0.32 0.68 Nil 0.025 0.21 Nil 14 Nil 38 18 0.02 0.02 Nil 0.17 Colourless