In 1997,the highest annual averages recorded were 131 micrograms per cubic metre of total suspended particulates and 73 micrograms per cubic metre of respirable suspended particulates.

• 在一九九七年全年，录得总悬浮粒子的最高平均水平为每立方米131微克，可吸入悬浮粒子则为每立方米73微克。