Filtration.
173. A total quantity of 6,656.08 million gallons of water was filtered during the year, 5,528.77 million gallons of which were provided from Jubilee Reservoir and the Smugglers Pass Intake. The Kowloon Slow Sand Beds dealt with 1,254.42 million gallons and the Rapid Gravity Filters at Shek Li Pui filtered the remaining 5,401.66 million gallons. Of the latter quantity 2,218.24 million gallons were supplied to the Island by the Cross Harbour Mains. Details are given in Appendix V.
Consumption.
174. The total quantity of water consumed in Kowloon during the year was 4,432.64 million gallons which included 98.46 million gallons supplied to shipping through Lai Chi Kok Water Boat Dock. These figures represent a total average daily supply of 12.15 million gallons per day, a total increase of 446.69 million gallons, equal to 1.23 million gallons per day, compared with 1939. The shipping supply consumption was 2.37 million gallons less than 1939. Details are shown in Appendix V.
The average consumption per head per day for all purposes was twenty gallons. In arriving at this figure the population has been estimated at 600,000.
Quality of Water.
175. During the year samples of water were examined by the Government Pathologist with the following results:
RAW WATER:
Total number of samples examined... 31
Number showing B. Coli present in 50 c.c. or less... 31 = 100%
FILTERED WATER-UNCHLORINATED:
Total number of samples examined... 31
Number showing B. Coli present in 50 c.c. or less... 31 = 100%
FILTERED WATER-CHLORINATED (At Service Reservoirs):
Total number of samples examined.... 31
Number showing B. Coli absent in 100 c.c. 14 45.16%
present in 100 c.c. 1 3.23%
absent in 50 c.c. 15 48.38%
present in 50 c.c. 1 3.23%
TAP WATER-FILTERED & CHLORINATED:
Total number of samples examined... 183
Number showing B. Coli absent in 100 c.c. 153 83.61%
absent in 50 c.c. 76 41.53%
present in 50 c.c. 15 8.20%
absent in 25 c.c. ... 7 3.83%
present in 16.6 c.c. 1 0.54%
present in 10 c.c. 1 0.54%
Page 43
[ 42 ]
Filtration.
173. A total quantity of 6,656.08 million gallons of water was filtered during the year, 5,528.77 million gallons of which were provided from Jubilee Reservoir and the Smugglers Pass Intake. The Kowloon Slow Sand Beds dealt with 1,254.42 million gallons and the Rapid Gravity Filters at Shek Li Pui filtered the remaining 5,401.66 million gallons. Of the latter quantity 2,218.24 million gallons were supplied to the Island by the Cross Harbour Mains. Details are given in Appendix V.
Consumption.
174. The total quantity of water consumed in Kowloon during the year was 4,432.64 million gallons which included 98.46 million gallons supplied to shipping through Lai Chi Kok Water Boat Dock. These figures represent a total average daily supply of 12.15 million gallons per day, a total increase of 446.69 million gallons, equal to 1.23 million gallons per day, compared with 1939. The shipping supply consumption was 2.37 million gallons less than 1939. Details are shown in Appendix V.
The average consumption per head per day for all purposes was twenty gallons. In arriving at this figure the population has been estimated at 600,000.
Quality of Water.
175. During the year samples of water were examined by the Government Pathologist with the following results:
RAW WATER:
Total number of samples examined...
31%
Number showing B. Coli present in 50 c.c. or less....... FILTERED WATER-UNCHLORINATED:
31
100%
Total number of samples examined.
31
Number showing B. Coli present in 50 c.c. or less......
31
= 100%
FILTERED WATER-CHLORINATED (At Service Reservoirs):
Total number of samples examined....
31
Number showing B. Coli absent in 100 c.c.
14
45.16%
>>
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present in 100 c.c.
1
3.23%
absent in 50 c.c.
15
48.38%
35
**
"
present in
50 c.c.
1
3.23%
TAP WATER-FILTERED & CHLORINATED:
Total number of samples examined........... Number showing B.C.C. absent in 100 c.c.
183
8345.36%
50 c.c.
76
41.53%
>>
13
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present in
50 c.c.
15
8.20%
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25 c.c.
7
www.
3.83%
16.6 c.c.
1
**
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**
10 c.c.
0.54% 0.54%
*
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17
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