24-4  Air Quality by Area Type and Roadside Condition (2004)
			(microgram/cu.m.)
Area Type and	Annual average air pollutant concentrations
Roadside			Total	Respirable
	Sulphur	Nitrogen	Suspended	Suspended
	Dioxide	Dioxide	Particulates	Particulates
Urban①	26	66	83	60
New Town②	26	56	88	64
Rural③	16	16	-	53
Roadside④	22	99	124	83
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.