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1-hr PM2.5 Unofficial PSI (Last 24 Hours)
1-hr PM2.5 µg/m³ (Last 24 Hours)
24-Hour Statistics & Hourly Readings
| Date & Time | North | South | East | West | Central |
|---|---|---|---|---|---|
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About Extrapolated Metrics
Note: Standard official PSI and AQI categorizations for PM2.5 are calculated using a 24-hour moving average. The numbers here show what the PSI/AQI would be should the current 1-hour PM2.5 concentration persist continuously over 24 hours.