Air quality in Kudamatsu, Japan today
Mr. Duck’s Air Quality Score
Moderate air today for Kudamatsu, 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 Kudamatsu today falls into the Moderate category. The primary pollutant identified is PM2.5 fine particles.
Measurements from five valid monitoring stations show a PM2.5 concentration of 11.0 µg/m³. No PM10 reference value is provided for this assessment. Data is shown via OpenAQ. The dataset includes readings taken at different times throughout the monitoring period, each contributing to the overall assessment. All reported values are expressed in micrograms per cubic meter. The five valid observations were combined to determine the category and identify PM2.5 as the dominant pollutant. No additional pollutants reached levels that would change the classification. 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 Kudamatsu contains a single monitoring location at 下松市大手町３丁目３－３, so the station count is one row per pollutant. All five measured species—nitric oxide (NO), nitrogen dioxide (NO2), total nitrogen oxides (NOX), fine particulate matter (PM2.5) and sulfur dioxide (SO2)—are reported from this same site. The most recent reading for each pollutant was recorded on 2026-02-10 at 22:00 UTC, which means the data are fresh within the last three days.
Across the five pollutants the observed values show virtually no variation because each metric has a single recorded point. NO is measured at 0.009 ppm, NO2 at 0.018 ppm, and NOX at 0.027 ppm; all three nitrogen‑oxide species share the same minimum, median and maximum because only one sample exists. PM2.5 is reported as 11.0 µg/m³, again with identical min/median/max values. SO2 registers a low concentration of 0.001 ppm, also without spread. Because there is only one observation per pollutant, the percentile estimates (10th and 90th) match the single value, indicating no detectable range in this snapshot.
The data therefore provide a very narrow view of air quality in Kudamatsu: coverage is limited to one fixed point, timestamps are recent but singular, and each pollutant shows a single constant figure rather than a distribution over time. Consequently, while the current readings give an immediate picture for that location, they do not capture spatial or temporal variability across the city.
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 latest values recorded on 2026‑02‑10 at 22:00 UTC. These readings provide a snapshot of current conditions, but air quality can differ across neighborhoods and change throughout the day, so local variations may not be captured in this summary.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| 下松市大手町３丁目３－３ | no | 0.009 | ppm | 2026-02-10 22:00 UTC |
| 下松市大手町３丁目３－３ | no2 | 0.018 | ppm | 2026-02-10 22:00 UTC |
| 下松市大手町３丁目３－３ | nox | 0.027 | ppm | 2026-02-10 22:00 UTC |
| 下松市大手町３丁目３－３ | pm25 | 11.0 | µg/m³ | 2026-02-10 22:00 UTC |
| 下松市大手町３丁目３－３ | so2 | 0.001 | ppm | 2026-02-10 22:00 UTC |