Clear Days


A clear day is a day in which all 5 criteria pollutants at all 13 urban rooftop stations complied with the short-term World Health Organization (WHO) Air Quality Guidelines. We have used green colour to represent a clear day and grey colour to represent a polluted day. For more details, please refer to FAQ.

  • 2019

    114/205

    2019
  • 2018

    153/365

    2018
  • 2017

    150/365

    2017

Clear Days Calendar


  • Clear days
  • Exceedance Days