Air quality in Sanyi, Taiwan today
Mr. Duck’s Air Quality Score
Moderate air today for Sanyi, Taiwan
This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.
Air quality today
The air quality in Sanyi today falls into the Moderate category according to the latest assessment. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 reference value of 10.0 and a PM10 reference value of 11.0, based on six valid observations collected via OpenAQ.
These values reflect the current state of particulate matter in the area without implying any trend or cause. 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 Sanyi air‑quality dataset currently draws from two monitoring sites that together provide twelve recent observations across six key pollutants: carbon monoxide (CO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter ≤ 10 µm (PM₁₀), particulate matter ≤ 2.5 µm (PM₂.₅) and sulfur dioxide (SO₂). All of the latest readings were recorded at 2026‑02‑10 23:00 UTC, so the freshest data for every pollutant is less than a week old.
Across the twelve rows the measured values show modest variation. CO ranges from 0.24 to 0.33 ppm with a median of 0.285 ppm; NO₂ spans 0.0095‑0.012 ppm (median 0.01075 ppm); O₃ varies between 0.019 and 0.0343 ppm (median 0.02665 ppm). Particulate concentrations are higher in absolute terms: PM₁₀ runs from 11 to 38 µg/m³, centred around a median of 24.5 µg/m³, while PM₂.₅ is tightly clustered between 10 and 11 µg/m³ (median 10.5 µg/m³). SO₂ shows the smallest range, from 0.0013 to 0.0069 ppm with a median of about 0.0041 ppm.
The dataset is fully up‑to‑date for each pollutant, but coverage is limited to just two stations in the broader Miaoli County area (identified as “苗栗縣 - 三義”). Because only a handful of locations contribute data, conditions can differ across Sanyi and surrounding neighborhoods, especially for pollutants like ozone that are sensitive to local photochemical activity. Users should keep in mind that while the numbers reflect recent measurements, they represent a snapshot from a small spatial sample rather than a comprehensive city‑wide picture.
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 data shown reflects six valid measurements and is Updated within 3 days, with the latest values recorded at 2026‑02‑10T23:00:00+00:00. This snapshot provides a brief overview of current conditions, but air quality can differ across neighborhoods and change throughout the day, so local variations may not be captured in these figures.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| Sanyi | co | 0.33 | ppm | 2021-05-17 05:00 UTC |
| Sanyi | no2 | 0.0095 | ppm | 2021-05-17 05:00 UTC |
| Sanyi | o3 | 0.0343 | ppm | 2021-05-17 05:00 UTC |
| Sanyi | pm10 | 38.0 | µg/m³ | 2021-05-17 05:00 UTC |
| Sanyi | pm25 | 11.0 | µg/m³ | 2021-05-17 05:00 UTC |
| Sanyi | so2 | 0.0069 | ppm | 2021-05-17 05:00 UTC |
| 苗栗縣 - 三義 | co | 0.24 | ppm | 2026-02-10 23:00 UTC |
| 苗栗縣 - 三義 | no2 | 0.012 | ppm | 2026-02-10 23:00 UTC |
| 苗栗縣 - 三義 | o3 | 0.019 | ppm | 2026-02-10 23:00 UTC |
| 苗栗縣 - 三義 | pm10 | 11.0 | µg/m³ | 2026-02-10 23:00 UTC |
| 苗栗縣 - 三義 | pm25 | 10.0 | µg/m³ | 2026-02-10 23:00 UTC |
| 苗栗縣 - 三義 | so2 | 0.0013 | ppm | 2026-02-10 23:00 UTC |