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PSI Readings over the last 24 Hours

Air quality readings will be available hourly from 1am to 12am.

24-hr PSI Readings from 1am to 12am on 31 Aug 2014

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
North 62 62 62 61 61 60 60 59 58 57 - -
South 54 54 54 53 53 52 52 52 52 52 - -
East 54 54 54 54 53 53 52 52 51 52 - -
West 61 61 61 61 61 60 60 59 58 58 - -
Central 55 55 55 55 54 54 53 52 51 51 - -
Overall Singapore 54-62 54-62 54-62 53-61 53-61 52-60 52-60 52-59 51-58 51-58 - -
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
North - - - - - - - - - - - -
South - - - - - - - - - - - -
East - - - - - - - - - - - -
West - - - - - - - - - - - -
Central - - - - - - - - - - - -
Overall Singapore - - - - - - - - - - - -

3-hr PSI Readings from 1am to 12am on 31 Aug 2014

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 55 55 55 55 54 53 52 52 52 54 - -
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI - - - - - - - - - - - -

Hourly updates of 3-hr PSI readings are provided from 1am to 12am. The 3-hr PSI readings are calculated based on PM2.5 concentrations only.

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