Air quality in Suwon-si, South Korea today

Mr. Duck’s Air Quality Score

Unhealthy for sensitive groups for Suwon-si, South Korea

⚠️ 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 today in Suwon‑si is classified as USG. The primary pollutant identified for the current assessment is PM2.5 (fine particles).

Measurements recorded from 47 valid monitoring points show a PM2.5 concentration of 42.0 µg/m³ and a PM10 level of 45.0 µg/m³. These values reflect the data shown via OpenAQ for this location. 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 air‑quality feed for Suwon‑si includes six measured pollutants – carbon monoxide (CO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter 10 µm or smaller (PM₁₀), particulate matter 2.5 µm or smaller (PM₂.₅) and sulfur dioxide (SO₂). Data come from 11 sensor rows that are grouped into eight distinct monitoring stations across the city, giving a modest spatial spread but not full coverage of every neighbourhood.

All recent observations were recorded on 2026‑02‑10 at 18:00 UTC, so the newest timestamps for each pollutant are about two weeks old. The freshness profile shows no data from today or the past three days; however, 48 rows (roughly four‑fifths of the dataset) have been updated within the last seven days, while the remaining 18 rows are older than a week. This means that while most readings are fairly current, there is still a gap for the very latest conditions.

Across the pollutants the recorded values illustrate a moderate range. CO varies between 0.46 and 0.70 ppm with a median of 0.58 ppm; NO₂ spans 0.0118‑0.037 ppm (median 0.0273 ppm); O₃ is measured from 0.0013 to 0.0212 ppm (median 0.012 ppm). Particulate matter shows broader dispersion: PM₁₀ ranges from 18 to 73 µg/m³ (median 47 µg/m³) and PM₂.₅ from 14 up to an extreme outlier of 9999 µg/m³ (median 42 µg/m³). SO₂ is the lowest‑concentration gas, recorded between 0.0012 and 0.0026 ppm (median 0.0018 ppm). These figures indicate that while most pollutants sit near their median values, PM₂.₅ includes a single unusually high reading that skews its maximum.

Overall, Suwon‑si’s dataset provides a snapshot of six key air‑quality components from eight stations, with the majority of data refreshed within the past week but no ultra‑recent measurements. Users should keep in mind that conditions can differ across the city and may have changed since the last update.

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 reflect 47 valid measurements and are marked as Updated within 3 days, with the latest values recorded at 2026‑02‑10T18:00:00+00:00. This snapshot provides a recent view of air quality across Suwon‑si, but conditions can differ by specific neighbourhoods and times of day, so local variations may not be captured in these aggregate figures.

OpenAQ station rows