National Environment Agency Our Environment
print Home Anti-Pollution & Radiation Protection Air Pollution Control PSI PSI Readings over the last 24 Hours

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 17 Apr 2014

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
North 66 66 67 68 68 68 68 68 69 - - -
South 63 63 63 64 65 65 65 66 65 - - -
East 58 58 58 59 60 61 62 63 65 - - -
West 60 61 62 63 63 63 63 63 64 - - -
Central 64 64 64 65 65 66 66 67 67 - - -
Overall Singapore 58-66 58-66 58-67 59-68 60-68 61-68 62-68 63-68 64-69 - - -
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 17 Apr 2014

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 60 63 68 71 74 75 74 76 77 - - -
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.

image description