Air quality in Hitoyoshi, Japan today
Mr. Duck’s Air Quality Score
Moderate air today for Hitoyoshi, Japan
This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.
Air quality today
The air quality in Hitoyoshi is rated as Moderate today. The primary pollutant identified is PM2.5, with a measured concentration of 28.0 µg/m³ based on five valid observations from OpenAQ data.
These values reflect the current monitoring results 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 dataset for Hitoyoshi contains measurements from a single monitoring site located at 人吉市西間下町８６－１. Five pollutants are reported: nitrogen monoxide (NO), nitrogen dioxide (NO₂), total nitrogen oxides (NOX), fine particulate matter (PM2.5) and sulfur dioxide (SO₂). All five rows were recorded on 2026-02-10 at 22:00 UTC, which is within the last three days, so the data are relatively fresh.
For each pollutant the observed values show no variation across the reporting period. NO was measured at 0.0 ppm, while both NO₂ and NOX were recorded at 0.007 ppm. SO₂ also displayed a constant reading of 0.001 ppm. The PM2.5 concentration was consistently 28.0 µg/m³. Because the minimum, median and maximum values are identical for every pollutant, there is no spread to describe; the dataset reflects a single snapshot rather than a range of conditions.
The coverage is limited to one station, so spatial variation within Hitoyoshi cannot be captured by this source. Although the timestamps are recent, the lack of multiple locations or repeated measurements over time means that the data provide only a narrow view of air quality at the specific address on the recorded date. Users should keep in mind that conditions elsewhere in the city or on other days may differ from what is shown here.
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 are based on five valid measurements and were refreshed recently, with the latest update recorded at 2026‑02‑10T22:00:00+00:00 (updated within 3 days). This snapshot reflects conditions at the time of sampling; air quality can vary across different neighborhoods and times of day within Hitoyoshi.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| 人吉市西間下町８６－１ | no | 0.0 | ppm | 2026-02-10 22:00 UTC |
| 人吉市西間下町８６－１ | no2 | 0.007 | ppm | 2026-02-10 22:00 UTC |
| 人吉市西間下町８６－１ | nox | 0.007 | ppm | 2026-02-10 22:00 UTC |
| 人吉市西間下町８６－１ | pm25 | 28.0 | µg/m³ | 2026-02-10 22:00 UTC |
| 人吉市西間下町８６－１ | so2 | 0.001 | ppm | 2026-02-10 22:00 UTC |