Air quality in Hidaka, Japan today
Mr. Duck’s Air Quality Score
Moderate air today for Hidaka, 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 Hidaka is currently classified as Moderate. The primary pollutant identified is PM2.5 (fine particles), with a reference concentration of 10.0 µg/m³ based on five valid measurements collected today.
These data are shown via OpenAQ and reflect the latest available readings 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 data set for Hidaka includes measurements of five key pollutants – nitrogen monoxide (NO), nitrogen dioxide (NO₂), total nitrogen oxides (NOX), fine particulate matter (PM2.5) and sulfur dioxide (SO₂). All values come from a single monitoring location, identified as 日高市中鹿山８１, giving a total of five rows of observations across the pollutants. Each pollutant record shows the most recent reading was taken on 2026-02-10 at 22:00 UTC, and every entry is flagged as having been updated within three days, so the data are uniformly fresh.
Across the five pollutants the recorded values are tightly clustered. NO is consistently measured at 0.001 ppm, NO₂ at 0.009 ppm and NOX at 0.010 ppm; each of these gases shows no variation between minimum, median and maximum, indicating a single snapshot rather than a range of observations. PM2.5 is reported as 10.0 µg/m³ with the same uniformity, while SO₂ registers a constant 0.0 ppm. Because there is only one monitoring site, the dataset does not capture spatial differences within Hidaka, and the lack of multiple timestamps means it cannot illustrate how concentrations change over time.
In practical terms, the data provide a current point‑in‑time picture for each pollutant but do not offer broader coverage or historical depth. Users should keep in mind that air quality can differ across neighborhoods and throughout the day, so this single‑site snapshot represents only one moment at one location in Hidaka.
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 updated within 3 days, with the most recent reading recorded on 2026‑02‑10 at 22:00 UTC. These values provide a current snapshot of air quality in Hidaka, but conditions can differ across neighborhoods and change throughout the day, so local variations may not be captured by this summary.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| 日高市中鹿山８１ | no | 0.001 | ppm | 2026-02-10 22:00 UTC |
| 日高市中鹿山８１ | no2 | 0.009 | ppm | 2026-02-10 22:00 UTC |
| 日高市中鹿山８１ | nox | 0.01 | ppm | 2026-02-10 22:00 UTC |
| 日高市中鹿山８１ | pm25 | 10.0 | µg/m³ | 2026-02-10 22:00 UTC |
| 日高市中鹿山８１ | so2 | 0.0 | ppm | 2026-02-10 22:00 UTC |