Spatial variation of mass concentration of roadside suspended particulate matter in metropolitan Hong Kong

L. Y. Chan, W. S. Kwok, Shuncheng Lee, C. Y. Chan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

37 Citations (Scopus)


This study conducted roadside particulate sampling to measure the total suspended particulate (TSP), PM10(particles <10μm in aerodynamic diameter) and PM2.5(particles <2.5μm in aerodynamic diameter) mass concentration in 11 urbanized and densely populated districts in Hong Kong. One hundred and thirty-three samples were obtained to measure the mass concentrations of TSP, PM10and PM2.5. According to these results, the TSP, PM10and PM2.5mass concentrations varied from 94.85 to 301.63μgm-3, 67.67 to 142.68μgm-3and 50.01 to 125.12μgm-3, respectively. The PM2.5/PM10ratio of all samples was 0.82 which ranged from 0.62 to 0.95. The PM levels and PM ratios in metropolitan Hong Kong significantly fluctuated from site-to-site and over time. The PM2.5mass concentration in different districts corresponding to urban industrial, new town, urban residential and urban commercial were 77.64, 87.50, 106.96 and 88.54μgm-3, respectively. The PM2.5level is high in Hong Kong, and for individual sampling, more than 60% daily measurements exceeded the NAAQS. The mass fraction of PM2.5in PM10and TSP is relatively high when compared with overseas studies.
Original languageEnglish
Pages (from-to)3167-3176
Number of pages10
JournalAtmospheric Environment
Issue number18
Publication statusPublished - 4 Aug 2001


  • Hong Kong
  • Metropolitan
  • PM and PM 10 2.5
  • Spatial variation
  • TSP

ASJC Scopus subject areas

  • Atmospheric Science
  • Environmental Science(all)
  • Pollution

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