Air quality in Hikari, Japan today
Mr. Duck’s Air Quality Score
Moderate air today for Hikari, 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 Hikari is currently classified as Moderate. The primary pollutant identified is PM2.5 (fine particles), with a measured concentration of 17.0 µg/m³ based on five valid observations from OpenAQ data.
Overall conditions reflect the moderate category and the reported PM2.5 level. 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 air‑quality feed for Hikari currently includes five measured pollutants – nitrogen monoxide (NO), nitrogen dioxide (NO₂), total nitrogen oxides (NOX), fine particulate matter (PM2.5) and sulfur dioxide (SO₂). All data come from a single monitoring location, identified as 光市大字光井６丁目１０－１, so the dataset contains five rows in total.
Each pollutant has one recorded value that is both the minimum, median and maximum for the period covered, indicating no observed variation within the sampled interval. NO registers at 0.014 ppm, NO₂ at 0.027 ppm, NOX at 0.041 ppm, PM2.5 at 17.0 µg/m³ and SO₂ at 0.001 ppm. The most recent update for every parameter was logged on 2026‑02‑10 at 22:00 UTC, which falls within the “updated within three days” freshness category used by the source.
Because only one station contributes data, the coverage is limited to conditions at that specific site and does not capture spatial differences across Hikari. The uniform timestamp means the dataset reflects a single point in time rather than a range of recent measurements, so any short‑term fluctuations elsewhere in the city would not be represented here. Nonetheless, the presence of all five pollutants provides a complete chemical snapshot for the location at the recorded moment.
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 Hikari reflects five valid measurements and is updated within three days, with the most recent reading recorded on 2026‑02‑10 at 22:00 UTC. While this snapshot provides a reliable overview of current conditions, air quality can differ across neighborhoods and change throughout the day, so localized variations may not be captured in these figures.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| 光市大字光井６丁目１０－１ | no | 0.014 | ppm | 2026-02-10 22:00 UTC |
| 光市大字光井６丁目１０－１ | no2 | 0.027 | ppm | 2026-02-10 22:00 UTC |
| 光市大字光井６丁目１０－１ | nox | 0.041 | ppm | 2026-02-10 22:00 UTC |
| 光市大字光井６丁目１０－１ | pm25 | 17.0 | µg/m³ | 2026-02-10 22:00 UTC |
| 光市大字光井６丁目１０－１ | so2 | 0.001 | ppm | 2026-02-10 22:00 UTC |