Q 65
24. At Tytam Tuk 1,590.71 million gallons were pumped, which was 300.32 million gallons less than in 1938. Pumping was carried out on 286 days during the year.
25. At Aberdeen the upper pumps worked 168 hours and the lower pumps for 2,858 hours.
26. Details of the pumping power costs are given in Appendix V.
Filtration.
27. The total amounts of water filtered at each filtration plant are given in Appendix VI.
Consumption.
28. The total quantity of filtered and unfiltered water supplied amounted to 5,801.98 million gallons, representing an average daily consumption of 15.90 million gallons per day, which included 1,764.62 million gallons (filtered) from the Mainland and 83.61 million gallons unfiltered. The total consumption was 602.95 million gallons or 1.65 million gallons per day more than in 1938. Water was supplied from the Mainland throughout the year, the daily average being 4.83 million gallons which is equal to 30.4% of the Island average consumption.
29. The average consumption of water per head per day for all purposes was 16.5 gallons. In arriving at this figure the population has been estimated at 960,000.
30.
The quantity of water supplied by meters was 4,582.11 million gallons, so that 79.0% of the total consumption was accounted for by meters, compared with 73.5% in 1938. After making allowance for water used through public standpipes, for washing filters, mains and service reservoirs, at fires, etc., it is estimated that 81.6% of the total consumption was accounted for compared with 76.1% in 1938. The improvement over 1938 is due partly to the increased time and labour spent on maintenance of meters and partly to waste detection. Details of consumptions are given in Appendices III, VII and VIII.
Quality of Water.
31. During the year samples of water were examined by the Government Bacteriologist with the following results:
Raw Water.
Total number of samples examined: 96
Number showing B. C. C. absent in 10 c.c.: 11 = 11.4%
Number showing B. C. C. present in 10 c.c. or less: 85 = 88.6%
Filtered Water Unchlorinated.
Total number of samples examined: 105
Number showing B. C. C. absent in 10 c.c.: 74 = 70.5%
Number showing B. C. C. present in 10 c.c. or less: 31 = 29.5%
Tap Water Filtered and Chlorinated.
(Mainly from inside services).
Total number of samples examined: 1,018
Number showing B. C. C. absent in 50 c.c.: 872 = 85.7%
Number showing B. C. C. absent in 10 c.c.: 111 = 10.9%
Number showing B. C. C. present in 10 c.c. or less: 35 = 3.4%
32. The supply was treated with 19,554 pounds of liquid chlorine and 7,770 pounds of chloride of lime during the year, which is equivalent to an average admixture of chlorine of about one half part per million.
33. The analyses by the Government Chemist showed that the filtered water was of excellent quality throughout the year.
Q 65
24. At Tytam Tuk 1,590.71 million gallons were pumped, which was 300.32 million gallons less than in 1938. Pumping was carried out on 286 days during the year.
25. At Aberdeen the upper pumps worked 168 hours and the lower pumps for 2,858 hours.
26. Details of the pumping power costs are given in Appendix V.
Filtration.
27. The total amounts of water filtered at each filtration plant are given in Appendix VI.
Consumption.
28. The total quantity of filtered and unfiltered water supplied amounted to 5,801.98 million gallons, representing an average daily consumption of 15.90 million gallons per day, which included 1,764.62 million gallons (filtered) from the Mainland and 83.61 million gallons unfiltered. The total consumption was 602.95 million gallons or 1.65 million gallons per day more than in 1938. Water was supplied from the Mainland throughout the year, the daily average being 4.83 million gallons which is equal to 30.4% of the Island average consumption.
30.
29. The average consumption of water per head per day for all purposes was 16.5 gallons. In arriving at this figure the population has been estimated at 960,000.
The quantity of water supplied by meters was 4,582.11 million gallons, so that 79.0% of the total consumption was accounted for by meters, compared with 73.5% in 1938. After making allowance for water used through public standpipes, for washing filters, mains and service reservoirs, at fires, etc., it is estimated that 81.6% of the total consumption was accounted for compared with 76.1% in 1938. The improvement over 1938 is due partly to the increased time and labour spent on maintenance of meters and partly to waste detection. of consumptions are given in Appendices III, VII and VIII,
Quality of Water.
Details
31. During the year samples of water were examined by the Government Bacteriologist with the following results
Raw Water.
Total number of samples examined
96
Number shewing B. C. C. absent in 10 c.c.
Number shewing B. C. C. present in 10 c.c. or less
11=11.4% 85=88.6%
Filtered Water Unchlorinated.
Total number of samples examined
105
Number shewing B. C. C. absent in 10 c.c.
74=70.5%
Number shewing B. C. C. present in 10 c.c. or less
31=29.5%
Tap Water Filtered and Chlorinated.
(Mainly from inside services).
Total number of samples examined
1,018
Number shewing B. C. C. absent in 50 c.c.
Number shewing B. C. C. absent in 10 c.c.
Number shewing B. C. C. present in 10 c.c. or less
872-85.7% 111=10.9% 35 3.4%
=
32. The supply was treated with 19,554 pounds of liquid chlorine and 7,770 pounds of chloride of lime during the year, which is equivalent to an average admixture of chlorine of about one half part per million.
33. The analyses by the Government Chemist shewed that the filtered water was of excellent quality throughout the year.
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