Air quality in Hita, Japan today
Mr. Duck’s Air Quality Score
Moderate air today for Hita, 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 Hita is currently classified as Moderate. The main pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 concentration of 22.0 µg/m³, based on five valid observations reported through OpenAQ.
This assessment reflects the latest available data for the city. 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 Hita contains measurements for five pollutants – nitrogen monoxide (NO), nitrogen dioxide (NO₂), total nitrogen oxides (NOX), fine particulate matter (PM2.5) and sulfur dioxide (SO₂). All five readings come from a single monitoring location at 日田市城町１－１－１０, so the city’s air‑quality picture is based on one station that supplies one row of data per pollutant, giving a total of five rows.
The most recent values were all recorded on 2026-02-10 at 22:00 UTC and are flagged as “Updated within 3 days,” indicating that the latest information is fresh. Because each pollutant has only one reported value, there is no observed range or variability in the data – the minimum, median, 10th percentile, 90th percentile and maximum are identical for every metric. For example, NO is consistently reported at 0.006 ppm, NO₂ at 0.004 ppm, NOX at 0.010 ppm, PM2.5 at 22.0 µg/m³ and SO₂ at 0.002 ppm.
With just a single monitoring site, the coverage is limited to conditions at that specific address; variations elsewhere in Hita are not captured by this dataset. The uniform timestamps across all pollutants show that the data set is synchronized, but the lack of multiple stations or repeated measurements means there is no insight into temporal trends or spatial differences within 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 for Hita reflects five 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 three days. This snapshot provides a brief overview of current conditions, but air quality can differ across neighborhoods and change throughout the day, so local variations may not be captured in these figures.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| 日田市城町１－１－１０ | no | 0.006 | ppm | 2026-02-10 22:00 UTC |
| 日田市城町１－１－１０ | no2 | 0.004 | ppm | 2026-02-10 22:00 UTC |
| 日田市城町１－１－１０ | nox | 0.01 | ppm | 2026-02-10 22:00 UTC |
| 日田市城町１－１－１０ | pm25 | 22.0 | µg/m³ | 2026-02-10 22:00 UTC |
| 日田市城町１－１－１０ | so2 | 0.002 | ppm | 2026-02-10 22:00 UTC |