Air quality in Isahaya, Japan today
Mr. Duck’s Air Quality Score
Good air today for Isahaya, 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 Isahaya is classified as Good today. The primary pollutant identified is PM2.5 (fine particles).
Measurements show a PM2.5 concentration of 5.0 µg/m³ based on five valid observations reported through OpenAQ. This indicates that the current level aligns with the reference value used for assessment. 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 Isahaya dataset currently draws from a single monitoring location in 馬渡町13, so the city’s air‑quality picture is based on one row of observations. All five pollutants tracked by OpenAQ are present: nitrogen monoxide (NO) at 0.0 ppm, nitrogen dioxide (NO₂) at 0.003 ppm, total nitrogen oxides (NOX) at 0.004 ppm, fine particulate matter (PM2.5) at 5.0 µg/m³, and sulfur dioxide (SO₂) at 0.0 ppm. Each measurement was last refreshed on 2026‑02‑10 at 22:00 UTC, meaning the most recent data are just a few days old.
Because only one station contributes, the range of values for each pollutant is effectively zero – the minimum, median and maximum are identical (e.g., NO2 consistently reads 0.003 ppm). This uniformity indicates no observed variability within the limited sample rather than stable city‑wide conditions. The PM2.5 reading of 5.0 µg/m³ also shows a single point value with no spread, while the gases are all recorded at either zero or very low concentrations.
Overall, the dataset offers complete coverage of the listed pollutants but from a narrow spatial perspective and with a snapshot timestamp that is recent yet isolated. Consequently, while the numbers give an immediate sense of current levels at the specific site, they do not capture possible differences across other neighborhoods or changes over time in Isahaya.
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 have been updated within 3 days, with the latest reading recorded at 2026‑02‑10T22:00:00+00:00. This snapshot reflects conditions at a specific time and place; air quality can differ across neighborhoods and fluctuate throughout the day, so the values may not represent every location or moment in Isahaya.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| 諌早市馬渡町13 | no | 0.0 | ppm | 2026-02-10 22:00 UTC |
| 諌早市馬渡町13 | no2 | 0.003 | ppm | 2026-02-10 22:00 UTC |
| 諌早市馬渡町13 | nox | 0.004 | ppm | 2026-02-10 22:00 UTC |
| 諌早市馬渡町13 | pm25 | 5.0 | µg/m³ | 2026-02-10 22:00 UTC |
| 諌早市馬渡町13 | so2 | 0.0 | ppm | 2026-02-10 22:00 UTC |