Air quality in Mae Sai district, Thailand today
Mr. Duck’s Air Quality Score
Moderate air today for Mae Sai district, Thailand
This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.
Air quality today
The air quality in Mae Sai district is currently classified as Moderate. The primary pollutant identified is PM2.5 (fine particles).
Measurements show a PM2.5 concentration of 34.5 µg/m³ based on two valid readings reported through OpenAQ. This reflects the latest available data for the area.
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 dataset for Mae Sai district contains six measured pollutants – carbon monoxide (CO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter 10 µm or smaller (PM₁₀), fine particulate matter 2.5 µm or smaller (PM₂.₅) and sulfur dioxide (SO₂). All values come from a single monitoring location, the Mae Sai Health Office, so the station count is one row per pollutant.
The most recent readings are mixed in age. CO, NO₂ and O₃ were last updated on 2025‑10‑10 at 14:00 UTC, while PM₁₀ dates back to 2025‑09‑22 at 05:00 UTC. The two pollutants with the freshest data are PM₂.₅ and SO₂, both recorded on 2026‑02‑10 at 22:00 UTC, which falls within the “updated within 7 days” freshness category.
Across the six parameters the reported values show little variation because each pollutant has a single measurement rather than a range of observations. CO, NO₂, O₃ and SO₂ all read 0.0 ppm, PM₁₀ is consistently 22.0 µg/m³ and PM₂.₅ is 34.5 µg/m³. Because the dataset consists of only one recent value per pollutant, median, minimum and maximum values are identical.
Overall the data coverage is limited to a single site and many of the timestamps are older than six months, especially for CO, NO₂, O₃ and PM₁₀. This means that while the listed pollutants are available for Mae Sai, the snapshot represents conditions at one location and may not capture spatial or temporal variations that occur elsewhere in the district.
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
The dataset for Mae Sai includes two valid measurements and was refreshed recently, with the latest update recorded on 10 February 2026 at 22:00 UTC; it is therefore considered “Updated within 3 days.” While these figures give a current snapshot of air quality, conditions can differ across neighbourhoods and change throughout the day, so local variations may not be fully captured in this summary.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| Maesai Health Office | co | 0.0 | ppm | 2025-10-10 14:00 UTC |
| Maesai Health Office | no2 | 0.0 | ppm | 2025-10-10 14:00 UTC |
| Maesai Health Office | o3 | 0.0 | ppm | 2025-10-10 14:00 UTC |
| Maesai Health Office | pm10 | 22.0 | µg/m³ | 2025-09-22 05:00 UTC |
| Maesai Health Office | pm25 | 34.5 | µg/m³ | 2026-02-10 22:00 UTC |
| Maesai Health Office | so2 | 0.0 | ppm | 2026-02-10 22:00 UTC |