Phuket Air Quality on 20 August 2025
On 20 August 2025, Phuket’s recorded daily PM2.5 AQI was 49 (Good), from a mean PM2.5 concentration of 9.0 µg/m³. Coverage: 24/24 hours; complete record.
Table dates: – (Phuket time, UTC+7). AQI 0–50 is Good; 51–100 is Moderate. Not Good means above the US AQI Good range: Moderate or worse. It is not a separate EPA category. Missing and partial days are excluded from the Not Good frequency.
Explore these dates with the AQI / PM2.5 chart and calendar →
| Date | AQI | PM2.5 (µg/m³) | Coverage |
|---|---|---|---|
| 20 Aug 2025 | 49 · Good | 9.0 | 24/24 hours · Complete |
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How these historical readings are calculated
Daily PM2.5 averages the available hourly concentrations in Bangkok time, then converts that concentration using this site's original AQI calculation. Weekly, monthly and yearly values average the available daily concentrations before conversion, including partial days. AQI numbers are never averaged.
From 18 October 2026, each locally collected reading averages the two highest fresh PM2.5 observations, or uses one when only one is eligible. These saved calculations are averaged within each hour. An hour needs at least 23 of 30 two-minute samples to qualify for coverage; less-covered hours remain visible as estimates. Earlier provider history selects the two highest available station concentrations for each hour, with the same one-station fallback. A complete day has at least 18 covered hours; today is always provisional.
The historical provider may supply corrected concentrations where the original live feed supplied raw values; unavailable original inputs cannot be reconstructed. This is a PM2.5 indicator, not an official multi-pollutant AQI or EPA NowCast.
Read the calculation and coverage methodology · Compare Phuket air quality by calendar month