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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 23 Oct 2014

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
North 63 64 65 67 67 68 69 70 71 72 72 73
South 64 64 65 65 66 67 68 69 70 71 73 74
East 64 65 65 65 66 67 67 68 69 71 72 73
West 71 71 72 72 73 73 72 74 75 76 77 78
Central 64 65 65 66 66 67 68 69 70 71 73 74
Overall Singapore 63-71 64-71 65-72 65-72 66-73 67-73 67-72 68-74 69-75 71-76 72-77 73-78
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 23 Oct 2014

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 75 74 74 76 78 80 79 82 83 87 87 86
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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