Air quality in Hualien City, Taiwan today

Mr. Duck’s Air Quality Score

Good air today for Hualien City, Taiwan

⚠️ 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 Hualien City is currently classified as Good. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 concentration of 5.0 µg/m³ and a PM10 level of 9.0 µg/m³, based on six valid observations.

Data are 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 Hualien City air‑quality feed contains data from six monitoring rows, each reporting the same set of six pollutants: carbon monoxide (CO), nitrogen dioxide (NO₂, written as NO2), ozone (O₃, written as O3), particulate matter ≤10 µm (PM10), particulate matter ≤2.5 µm (PM2.5, written as PM2.5), and sulfur dioxide (SO₂). All six rows are current, with the most recent measurement timestamped 2026‑02‑10 23:00 UTC, which falls within the “updated within 7 days” freshness category for every pollutant.

The values recorded are remarkably consistent across the dataset. CO is reported at 0.17 ppm in every row, NO₂ at 0.002 ppm, O₃ at 0.023 ppm, PM10 at 9.0 µg/m³, PM2.5 at 5.0 µg/m³, and SO₂ at 0.0004 ppm. For each pollutant the minimum, median, and maximum are identical, indicating no observed variation among the six rows on the latest sampling date.

Because the dataset consists of a single recent snapshot from all six stations, it provides a clear but limited picture of Hualien’s air quality at that moment. The uniformity of values suggests either highly homogeneous conditions across the monitored locations or that the reporting interval captured only one measurement cycle. Users should keep in mind that conditions can differ by place and time, and additional observations would be needed to describe any temporal or spatial changes beyond this single‑timepoint view.

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 most recent reading recorded at 2026‑02‑10T23:00:00+00:00. These values provide a current snapshot of air quality in Hualien City, but conditions can differ across neighborhoods and change throughout the day, so local variations may not be captured by this summary.

OpenAQ station rows