Air quality in Toufen, Taiwan today
Mr. Duck’s Air Quality Score
Good air today for Toufen, 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 Toufen is rated as Good today. The primary pollutant identified is PM2.5, fine particulate matter measured at a reference concentration of 9.0 µg/m³, while the corresponding PM10 level stands at 21.0 µg/m³ based on six valid observations.
Data are shown via OpenAQ and reflect the current monitoring results for the city. 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
Toufen’s air‑quality feed draws from two monitoring sites that together provide twelve recent observations across six key pollutants. The dataset includes 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 information is current within the past week for every pollutant.
The measured values show a fairly narrow spread. CO ranges from 0.12 to 0.31 ppm with a median of 0.215 ppm; NO₂ varies between 0.0006 and 0.012 ppm, centering around 0.0063 ppm; O₃ is recorded from 0.009 up to 0.0287 ppm, with a typical level near 0.0189 ppm. Particulate matter concentrations are modest: PM₁₀ sits between 21 and 28 µg/m³ (median 24.5 µg/m³) while PM₂.₅ spans 9 to 12 µg/m³ (median 10.5 µg/m³). Sulfur dioxide is the most stable, ranging only from 0.0013 to 0.0014 ppm with a median of 0.00135 ppm.
Because both stations report data for all six pollutants, coverage is even across the suite of measurements, but the overall sample size remains limited to twelve rows. The recent timestamps mean the snapshot reflects conditions at a single point in time rather than continuous monitoring, so day‑to‑day variations are not captured here. Users should keep in mind that air quality can differ across neighborhoods and over shorter intervals than those represented by this dataset.
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 current dataset for Toufen includes six valid measurements and is marked as Updated within 3 days, with the latest values recorded at 2026‑02‑10T23:00:00+00:00. These figures represent a snapshot of conditions across the monitoring network; actual air quality can differ by specific location and time of day within the city.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| Toufen | co | 0.12 | ppm | 2021-05-17 05:00 UTC |
| Toufen | no2 | 0.0006 | ppm | 2021-05-17 05:00 UTC |
| Toufen | o3 | 0.0287 | ppm | 2021-05-17 05:00 UTC |
| Toufen | pm10 | 28.0 | µg/m³ | 2021-05-17 04:00 UTC |
| Toufen | pm25 | 12.0 | µg/m³ | 2021-05-17 05:00 UTC |
| Toufen | so2 | 0.0013 | ppm | 2021-05-17 05:00 UTC |
| 苗栗縣 - 頭份 | co | 0.31 | ppm | 2026-02-10 23:00 UTC |
| 苗栗縣 - 頭份 | no2 | 0.012 | ppm | 2026-02-10 23:00 UTC |
| 苗栗縣 - 頭份 | o3 | 0.009 | ppm | 2026-02-10 23:00 UTC |
| 苗栗縣 - 頭份 | pm10 | 21.0 | µg/m³ | 2026-02-10 23:00 UTC |
| 苗栗縣 - 頭份 | pm25 | 9.0 | µg/m³ | 2026-02-10 23:00 UTC |
| 苗栗縣 - 頭份 | so2 | 0.0014 | ppm | 2026-02-10 23:00 UTC |