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Air Pollution Index Monthly Summary
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January 2006 - March 2006

General Stations

Roadside Stations

General Stations
Station Distribution of Hourly API (Number of Hours)
Low
(0-25)
Medium
(26-50)
High
(51-100)
Very High
(101-200)
Severe
(201-500)
Central/Western 0 781 1290 33 0
Eastern 39 1085 1017 0 0
Kwai Chung 12 786 1336 13 0
Kwun Tong 0 881 1208 11 0
Sha Tin 170 797 1160 0 0
Sham Shui Po 0 694 1393 50 0
Tai Po 46 391 404 14 0
Tap Mun 182 952 972 0 0
Tsuen Wan 41 736 1332 22 0
Tung Chung 72 646 1406 27 0
Yuen Long 25 686 1386 51 0
Distribution of Hourly API for General Stations for the period January 2006 - March 2006
Legend
 
API
Percentage
  Severe (201-500) 0.00
  Very High (101-200) 1.00
  High (51-100) 58.27
  Medium (26-50) 38.09
  Low (0-25) 2.65

Roadside Stations
Station Distribution of Hourly API (Number of Hours)
Low
(0-25)
Medium
(26-50)
High
(51-100)
Very High
(101-200)
Severe
(201-500)
Causeway Bay 0 39 2005 107 0
Central 0 222 1750 120 0
Mong Kok 0 249 1854 44 0
Distribution of Hourly API for Roadside Stations for the period January 2006 - March 2006
Legend
 
API
Percentage
  Severe (201-500) 0.00
  Very High (101-200) 4.24
  High (51-100) 87.78
  Medium (26-50) 7.98
  Low (0-25) 0.00

Remark: The total number of hourly API readings at a station may be less than the total number of hours in the month/quarter because sometimes measurement may have to be suspended due to maintenance work at that station.

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