Air quality in Miaoli City, Taiwan today
Mr. Duck’s Air Quality Score
Moderate air today for Miaoli City, 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 Miaoli City is currently classified as Moderate. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 concentration of 10.0 µg/m³ and a PM10 level of 17.0 µg/m³, based on six valid observations reported through OpenAQ.
These values reflect the present conditions 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 dataset for Miaoli City contains measurements for six common air‑quality 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). These values come from a total of twelve data rows collected at two monitoring stations, each providing a snapshot of the local atmosphere.
All of the most recent observations were recorded on 2026‑02‑10 at 23:00 UTC, which means every pollutant in the current feed is fresh and falls within the “updated within seven days” category. The CO reading reaches a maximum of 0.30 ppm while the minimum observed value is 0.20 ppm, with a median of 0.25 ppm; NO₂ varies from 0.0047 ppm up to 0.017 ppm and has a median near 0.011 ppm. Ozone shows a broader spread, ranging between 0.007 ppm and 0.0279 ppm with a median of about 0.017 ppm. Particulate matter is reported in micrograms per cubic metre: PM10 values sit between 17 µg/m³ and 23 µg/m³ (median 20 µg/m³), whereas PM2.5 is constant at 10 µg/m³ across all rows. Sulfur dioxide is the lowest‑concentration gas, ranging from 0.001 ppm to 0.0036 ppm with a median of roughly 0.0023 ppm.
Because the data come from only two stations, spatial coverage within Miaoli City is limited; conditions can differ in neighborhoods that are not directly represented by these monitors. Nevertheless, the dataset provides a recent and complete set of pollutant readings, allowing users to see typical concentrations (medians) alongside the observed extremes for each measured component.
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 three days, with the most recent reading recorded on 2026‑02‑10 at 23:00 UTC. 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 |
|---|---|---|---|---|
| Miaoli | co | 0.2 | ppm | 2021-05-17 05:00 UTC |
| Miaoli | no2 | 0.0047 | ppm | 2021-05-17 05:00 UTC |
| Miaoli | o3 | 0.0279 | ppm | 2021-05-17 05:00 UTC |
| Miaoli | pm10 | 23.0 | µg/m³ | 2021-05-17 05:00 UTC |
| Miaoli | pm25 | 10.0 | µg/m³ | 2021-05-17 05:00 UTC |
| Miaoli | so2 | 0.0036 | ppm | 2021-05-17 05:00 UTC |
| 苗栗縣 - 苗栗 | co | 0.3 | ppm | 2026-02-10 23:00 UTC |
| 苗栗縣 - 苗栗 | no2 | 0.017 | ppm | 2026-02-10 23:00 UTC |
| 苗栗縣 - 苗栗 | o3 | 0.007 | ppm | 2026-02-10 23:00 UTC |
| 苗栗縣 - 苗栗 | pm10 | 17.0 | µg/m³ | 2026-02-10 23:00 UTC |
| 苗栗縣 - 苗栗 | pm25 | 10.0 | µg/m³ | 2026-02-10 23:00 UTC |
| 苗栗縣 - 苗栗 | so2 | 0.001 | ppm | 2026-02-10 23:00 UTC |