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227. Distribution:-The total quantity of water consumed during the year was 6,877 million gallons on the Island and 5,409 million gallons on the Mainland, (excluding New Territories) a grand total of 12,286 million gallons. Included in the Island consumption was 2,425 million gallons supplied from the Mainland which was 35.3% of the total Island consumption. The total consumption was 12,286 million gallons or 10% more than in the previous year. Assuming an average population over the year of 2,000,000 the consumption per head per day for all purposes was about 17 gallons. Further details are given in Tables I & II & III.
228. Details of the supply given throughout the year are:
Hours of supply per day Period Total No. of days 16 hours (6 a.m.-10 p.m.) 1st April-18th July 1949 109 24 hours 19th July-20th July 1949 2 16 hours (6 a.m.-10 p.m.) 21st July-11th August 1949 22 17 hours (6 a.m.-11 p.m.) 12th August-31st Oct. 1949 81 15 hours (6.30 a.m.-9.30 p.m.) 1st Nov. 1949-12th Feb. 1950 104 12 hours (6.30 a.m.-1.30 p.m.) & (4 p.m.-9 p.m.) 13th Feb.-15th Feb. 1950 3 24 hours 16th Feb.-18th Feb. 1950 3 12 hours (6.30 a.m.-1.30 p.m.) & (4 p.m.-9 p.m.) 19th Feb.-31st March 1950 41A full supply was thus maintained for 5 days only compared with 173 days in 1948/49.
229. Service Reservoirs and Mains:-General maintenance and washing out of all service reservoirs and mains was continued. A new 6″ cement concrete Invert was laid in the old 750 foot tank above Po Shan Road to render it watertight. At Shek Li Pui Service Reservoir the 24″ steel main, which is laid on the Invert of the south half, was concreted in to check the corrosion of the steel. Repairs numbering 2,154 to mains, valves and hydrants on the Island and 896 on the Mainland were undertaken.
230. Waste Detection and Prevention:
The preparation of detail plans for waste detection areas was continued. Towards the end of the year a senior Waterworks Inspector was engaged full time on this work and in arranging for night
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