Air quality in Ichinoseki, Japan today
Mr. Duck’s Air Quality Score
Moderate air today for Ichinoseki, 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 Ichinoseki is currently classified as Moderate. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 concentration of 13.0 µg/m³ based on six 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 Ichinoseki includes measurements of five pollutants – PM2.5, nitrogen monoxide (NO), nitrogen dioxide (NO₂), total nitrogen oxides (NOX) and sulfur dioxide (SO₂). In total six rows of data are recorded across two monitoring stations, giving a modest but concrete picture of the city’s air quality at specific points.
All values were last updated on 2026-02-10 22:00 UTC, which falls within the “updated within three days” freshness window, so the information reflects very recent conditions. For PM2.5 the six rows show a minimum of 7.0 µg/m³, a median of 10.0 µg/m³ and a maximum of 13.0 µg/m³, with the 10th‑percentile at 7.6 µg/m³ and the 90th‑percentile at 12.4 µg/m³ – indicating a relatively narrow spread around the median. The nitrogen oxides series are each represented by a single value: NO is consistently 0.017 ppm, NO₂ is 0.016 ppm and NOX totals 0.033 ppm, all recorded at the same site (一関市山目字三反田１５２－１). Sulfur dioxide appears only once, reported as 0.0 ppm at a different location (一関市竹山町７－５).
The coverage is uneven: while PM2.5 and the nitrogen oxides have multiple recent readings from one station, SO₂ is captured at just one site and shows no detectable concentration in that sample. This limited spatial distribution means conditions can differ across Ichinoseki, especially for pollutants with fewer reporting points. Nonetheless, the data are current and provide a clear snapshot of the measured range for each pollutant on the latest sampling day.
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 six 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 Ichinoseki’s air quality but may not represent conditions everywhere in the city or at other times, as concentrations can vary by location and moment.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| 一関市山目字三反田１５２－１ | no | 0.017 | ppm | 2026-02-10 22:00 UTC |
| 一関市山目字三反田１５２－１ | no2 | 0.016 | ppm | 2026-02-10 22:00 UTC |
| 一関市山目字三反田１５２－１ | nox | 0.033 | ppm | 2026-02-10 22:00 UTC |
| 一関市山目字三反田１５２－１ | pm25 | 13.0 | µg/m³ | 2026-02-10 22:00 UTC |
| 一関市竹山町７－５ | pm25 | 7.0 | µg/m³ | 2026-02-10 22:00 UTC |
| 一関市竹山町７－５ | so2 | 0.0 | ppm | 2026-02-10 22:00 UTC |