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1-hr PM2.5 (µg/m³)
*AQI categorization for PM2.5 is based on 24-hr average (which this chart is NOT), and is included for reference only.
1-hr PM2.5 Unofficial PSI
*PSI categorization for PM2.5 is based on 24-hr average (which this chart is NOT), and is included for reference only.
Hourly Readings & Statistics
| Date & Time | North | South | East | West | Central |
|---|---|---|---|---|---|
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About Extrapolated Metrics
PSI and AQI are only defined for 24-hr average concentration. The numbers here show what the PSI/AQI would be should the current hour readings persist over 24 hours.