Air quality in Masuda, Japan today
Mr. Duck’s Air Quality Score
Good air today for Masuda, 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 Masuda 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.
Overall conditions meet the Good category criteria with no additional pollutants highlighted. 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 Masuda currently contains a single monitoring location at 益田市昭和町１３－１, providing one row of recent measurements for each of the five pollutants tracked: nitrogen monoxide (NO), nitrogen dioxide (NO₂), combined nitrogen oxides (NOX), fine particulate matter (PM2.5) and sulfur dioxide (SO₂). All five rows were last updated on 2026-02-10 22:00 UTC, which places every reading within the past three days, so the information reflects very recent conditions at that site.
Across the pollutants the recorded values are identical for each metric’s minimum, median and maximum, indicating no observed variation in this limited sample. NO registers 0.001 ppm, NO₂ 0.004 ppm, NOX 0.005 ppm, PM2.5 5.0 µg/m³ and SO₂ 0.003 ppm at the sole station. Because there is only one measurement per pollutant, the spread (10th‑percentile to 90th‑percentile) is also a single point, so the dataset does not capture any temporal or spatial fluctuations within Masuda.
The coverage therefore consists of one sensor providing fresh data for all five pollutants, but it offers no insight into how air quality might differ across other neighborhoods or over longer periods. Users should keep in mind that conditions can vary by location and time, and the present figures represent a snapshot from a single point rather than a comprehensive city‑wide picture.
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 reflects five valid measurements and is marked as Updated within 3 days, with the most recent reading recorded at 2026‑02‑10T22:00:00+00:00. This snapshot provides a brief view of current conditions; however, air quality can differ across neighborhoods and change throughout the day, so values may not represent every location or moment in Masuda.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| 益田市昭和町１３－１ | no | 0.001 | ppm | 2026-02-10 22:00 UTC |
| 益田市昭和町１３－１ | no2 | 0.004 | ppm | 2026-02-10 22:00 UTC |
| 益田市昭和町１３－１ | nox | 0.005 | ppm | 2026-02-10 22:00 UTC |
| 益田市昭和町１３－１ | pm25 | 5.0 | µg/m³ | 2026-02-10 22:00 UTC |
| 益田市昭和町１３－１ | so2 | 0.003 | ppm | 2026-02-10 22:00 UTC |