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PSI Updates
at 4am on 31 May 2016

24-hr PSI: 39 - 53
3-hr PSI: 49
1-hr PM2.5 (µg/m3): 5 - 24

  • PSI: 53 North
  • PSI: 39 West
  • PSI: 43 Central
  • PSI: 52 East
  • PSI: 45 South

Note: Air quality based on 24-hr PSI is as follows:

PSI Value Air Quality Descriptor
0 - 50 Good
51 - 100 Moderate
101 - 200 Unhealthy
201 - 300 Very unhealthy
Above 300 Hazardous

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