[Report 1971] / Sanitary Committee [- Medical Officer of Health], Cornwall County Council.

  • Cornwall (England). County Council.
Date:
1971
Catalogue details

Licence: Attribution 4.0 International (CC BY 4.0)

Credit: [Report 1971] / Sanitary Committee [- Medical Officer of Health], Cornwall County Council. Source: Wellcome Collection.

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    reservoir and treatment works on the River Tamar, calculated to yield 2 million gallons per day with the capability of being extended at a later date to increase to 4 million gallons per day. South Cornwall Water Board are preparing a scheme for augmenting their Stithians water source by pumping up to 2 million gallons per day into the reservoir from the River Kennall. Other proposals designed to meet the longer term needs of the County are at present being promulgated by the Cornwall River Authority. A brief description of each water undertaking in the County together with a list of major improvements carried out during 1971 is given below. WEST CORNWALL water BOARD Area of supply Population: Estimated numbers of population supplied: Water consumption: 106.03 sq. miles 48,161 (1970-47,357) In houses: 41,227 By standpipe: 1,274 Maximum: 3,433,000 gallons per day (1970 3,466,000) Average: 2,690,000 gallons per day (1970 2,684,000) Minimum: 2,329,000 gallons per day (1970 2,124,000) Number of new connections to mains: 519 The Board’s principal sources of supply are Drift Reservoir, Bussow Reservoir, Nanpusker Shaft and Adit, Trenwith Borehole, Hendra Stream and Polteggan Well, which together with various minor sources provide a total reliable yield of approximately 4.22 m.g.d. (million gallons per day). Water from the four principal sources is fully treated by chemical coagulation, pressure filtration, chlorination, and the addition of lime to correct acidity. Water from four of the minor sources is chlorinated and pH adjusted, and one minor supply chlorinated only. The Board installed approximately one mile of 4” P.V.C. pipe as renewal of exist- ing mains and a new extension to serve industrial premises. SOUTH CORNWALL WATER BOARD Area of supply: Population: 390 sq. miles 145,700(1970-138,000) In houses: 136,500 By standpipe: None Maximum: 9,513,000 gallons per day (1970 9,246,000) Average: 7,800,000 gallons per day (1970 7,700,000) Minimum: 6,903,000 gallons per day (1970 6,340,000) Estimated number of population supplied: Water consumption: Number of new connections to mains: 1,775