Air quality in Bangkok, Thailand today

Mr. Duck’s Air Quality Score

Unhealthy for sensitive groups for Bangkok, Thailand

⚠️ This website is currently under active development. Some data may be incomplete or temporarily inaccurate. For health-critical decisions, please verify information through official government or environmental sources.

Categories follow US EPA AQI breakpoints for PM (estimate from latest valid measurements; this project does not compute EPA NowCast/24-hour AQI yet).

This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.

Air quality today

The air quality in Bangkok is classified as USG today. The primary pollutant measured is PM2.5 (fine particles). The observed PM2.5 concentration is 51.41 µg/m³, while PM10 stands at 125.0 µg/m³. These values are based on 183 valid measurements. The readings represent the latest available data for the day. The assessment aggregates multiple monitoring stations across the city. The PM2.5 level of 51.41 µg/m³ is the reference value used for the category.

Data is shown via OpenAQ. This page is informational; for health guidance, use official sources such as EPA AirNow or WHO.

Latest sensor values

PM categories follow US EPA AQI breakpoints, shown here as an estimate derived from the latest valid measurements (this project does not compute EPA NowCast/24-hour AQI yet).

What the data includes

The OpenAQ feed for Bangkok pulls data from 132 monitoring stations, producing 438 individual rows. Only 183 of those rows have been updated within the past 30 days, while 143 are older and 112 lack a clear timestamp, so the overall picture includes a mix of recent and dated observations. The dataset currently provides measurements for PM2.5, PM10, PM1, temperature, relative humidity, ultrafine particles (UM003), ozone (O₃) and nitrogen dioxide (NO₂). Sensors for carbon monoxide (CO) and sulfur dioxide (SO₂) are listed among the monitored pollutants but no recent values appear in the available rows.

Across the recent records, PM2.5 values range from 0 µg/m³ up to about 81 µg/m³, with a median of 33 µg/m³; the 10th and 90th percentiles sit at roughly 15 µg/m³ and 58 µg/m³ respectively. PM10 shows a broader spread, from 1 µg/m³ to 125 µg/m³, median 45 µg/m³, and the middle‑most 80 % of readings lie between 16 µg/m³ and 95 µg/m³. PM1 is generally lower, spanning 0 µg/m³ to 53.7 µg/m³, with a median near 22.5 µg/m³ and most values between 8.5 µg/m³ and 45 µg/m³. Temperature readings cluster between 20.5 °C and 34.9 °C, median 28.2 °C, while relative humidity varies from 26.7 % to 86.6 %, median 52.3 %. UM003 particle counts are highly variable, from about 19 particles/cm³ up to 13 286 particles/cm³, median 2 910 particles/cm³. Ozone concentrations are low, from 0 ppm to 0.051 ppm, median 0.005 ppm, with the 90th percentile at 0.025 ppm. NO₂ follows a similar pattern, ranging 0 ppm to 0.047 ppm, median 0.004 ppm, 90th percentile 0.042 ppm. All of these pollutant‑specific timestamps are from 2026‑02‑10 22:00 UTC (or 22:03 UTC for PM2.5), indicating that the most recent data for the available parameters are fresh, even though many station rows overall remain older or unverified.

Learn more about sources and filtering: About the data.

Trusted references: WHO (Air pollution) · US EPA AirNow · European Environment Agency (Air)

Latest sensor values (bars)

PM categories follow US EPA AQI breakpoints, shown here as an estimate derived from the latest valid measurements (this project does not compute EPA NowCast/24-hour AQI yet).

Data notes

This dataset contains 183 valid measurements and is Updated within 30 days. The data were last refreshed on 2026-02-10T22:03:54+00:00. While these figures represent city‑wide averages, air quality can vary by location and time within Bangkok, so individual readings may differ from the reported values.

OpenAQ station rows