Air quality in Hadano, Japan today

Mr. Duck’s Air Quality Score

Good air today for Hadano, Japan

⚠️ 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 Hadano is rated as Good today. The primary pollutant identified is PM2.5, with a measured concentration of 4.0 µg/m³ based on ten valid observations reported through OpenAQ.

This assessment reflects the current monitoring data without additional interpretation. 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 Hadano includes six measured pollutants – carbon monoxide (CO), nitrogen oxide (NO), nitrogen dioxide (NO₂), total nitrogen oxides (NOX), fine particulate matter (PM2.5) and sulphur dioxide (SO₂). Data come from two monitoring stations, giving a total of ten recent rows across the city. All values were last updated on 2026‑02‑10 at 22:00 UTC, so the information is current within the past three days.

For gases measured at both stations, the recorded concentrations are low and show little variation. NO ranges from 0.002 to 0.004 ppm with a median of 0.003 ppm; NO₂ spans 0.004‑0.008 ppm (median 0.006 ppm); and NOX varies between 0.006 and 0.012 ppm (median 0.009 ppm). PM2.5, also measured at two sites, is consistently low, ranging from 3.0 to 4.0 µg/m³ with a median of 3.5 µg/m³. In contrast, SO₂ and CO each come from a single sensor: the SO₂ reading is a constant 0.001 ppm, while CO is recorded at 0.2 ppm.

The dataset therefore provides full coverage for all six pollutants but with uneven spatial representation – three of the pollutants (NO, NO₂, NOX) and PM2.5 benefit from two‑station sampling, whereas SO₂ and CO rely on a single point measurement. The narrow numeric ranges and identical recent timestamps suggest stable conditions at the time of collection, though actual citywide air quality can still differ by location and moment because only limited stations contribute data.

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 for Hadano reflects ten valid measurements and was refreshed recently, with the latest update recorded on 2026‑02‑10 at 22:00 UTC; it is therefore considered “Updated within 3 days.” While this snapshot provides a reliable overview of current conditions, air quality can differ across neighborhoods and change throughout the day, so local variations may exist.

OpenAQ station rows