Air quality in Pohang-si, South Korea today

Mr. Duck’s Air Quality Score

Moderate air today for Pohang-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

Today the air quality in Pohang-si is classified as Moderate. The primary pollutant identified is PM2.5. Measurements indicate a PM2.5 concentration of 33.0 µg/m³ and a PM10 concentration of 53.0 µg/m³. The reported PM2.5 value aligns with its reference level of 33.0 µg/m³, while the PM10 reading matches the reference level of 53.0 µg/m³. These figures are based on 72 valid observations collected across the city. Data is shown via OpenAQ. All reported concentrations are expressed in micrograms per cubic meter. The count of valid measurements used for this assessment is 72. The dataset aggregates readings from several monitoring stations within Pohang-si.

The dataset reflects the current monitoring period without projection. 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 Pohang‑si contains 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). Thirteen monitoring stations contribute data, providing a total of seventy‑eight rows of observations across all pollutants. The most recent reading for each pollutant was recorded on 2026‑02‑10 18:00 UTC, and the system flags all of them as “Updated within 30 days,” indicating that the information is relatively fresh for a public‑facing air‑quality page.

Across the pollutants the observed values show a modest spread. For gases, CO ranges from a low of 0.21 ppm to a median of 0.51 ppm, with the 10th and 90th percentiles at 0.29 ppm and 0.67 ppm respectively. NO₂ is measured between 0.0048 ppm and a median of 0.0096 ppm, while O₃ varies from 0.0252 ppm to a median of 0.0395 ppm; their percentile bands (NO₂ p10 0.0052 ppm p90 0.0219 ppm, O₃ p10 0.0364 ppm p90 0.0428 ppm) illustrate limited but detectable variation. Particulate matter shows typical concentrations of 24 µg/m³ to 29 µg/m³ for PM10 (median 29 µg/m³, p10 26 µg/m³, p90 52.2 µg/m³) and 17 µg/m³ to 20 µg/m³ for PM2.5 (median 20 µg/m³, p10 17.2 µg/m³, p90 31.4 µg/m³). SO₂ values are low, spanning 0.0018 ppm to a median of 0.0023 ppm, with p10 0.0019 ppm and p90 0.00324 ppm.

All pollutants list a maximum value of 9 999.0 in their records, which is a placeholder rather than a true measurement and suggests that extreme or missing readings are not captured in the current dataset. Consequently, while the available data give a snapshot of typical conditions in Pohang‑si, the true range of air quality can differ across neighborhoods and times not represented by the recent observations.

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

This dataset includes 72 valid measurements and is updated within 30 days, with the most recent data recorded on 2026-02-10 at 18:00 UTC. The values represent city‑wide averages and are intended as a general reference. Air quality can vary by location and time within Pohang‑si, so conditions at specific sites may differ from the reported figures.

OpenAQ station rows