24-4  Air Quality by Area Type and Roadside Condition (2005)
				(microgram/cu.m.)
	Annual average air pollutant concentrations
Area Type and
Roadside			Total	Respirable
	Sulphur	Nitrogen	Suspended	Suspended
	Dioxide	Dioxide	Particulates	Particulates
Urban①	23	60	81	55
New Town②	22	49	74	56
Rural③	14	14	-	50
Roadside④	22	96	112	75
Notes: ①Includes Kwai Chung, Central/Western, Sham Shui Po, Kwun Tong, Eastern and Tsuen Wan.
②Includes Tai Po, Sha Tin, Yuen Long and Tung Chung.
③Includes Tap Mun.
④Includes Causeway Bay, Central and Mong Kok.
"-" Not applicable.