Air quality in Ichinomiya, Japan today

Mr. Duck’s Air Quality Score

Moderate air today for Ichinomiya, Japan

⚠️ This website is currently under active development. Some data may be incomplete or temporarily inaccurate. For health-critical decisions, please verify information through official government or environmental sources.

Categories follow US EPA AQI breakpoints for PM (estimate from latest valid measurements; this project does not compute EPA NowCast/24-hour AQI yet).

This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.

Air quality today

The air quality in Ichinomiya is currently classified as Moderate. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 concentration of 16.0 µg/m³, based on 23 valid observations collected via OpenAQ.

Overall conditions reflect the reported category and pollutant levels without additional context. 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 Ichinomiya includes six measured pollutants – carbon monoxide (CO), nitrogen oxide (NO), nitrogen dioxide (NO₂), total nitrogen oxides (NOX), fine particulate matter (PM₂.5) and sulfur dioxide (SO₂). The dataset comprises 23 individual rows drawn from five monitoring stations across the city, giving a modest spatial snapshot of conditions at a single point in time.

All values shown were last refreshed on 2026-02-10 22:00 UTC, which falls within the three‑day freshness window used by the source. CO is reported from one station (一宮市平島２－１－１２) with a constant reading of 0.4 ppm; NO appears in five rows at a minimum of 0.0 ppm and a maximum of 0.017 ppm, with a median of 0.001 ppm. NO₂ and NOX each have five rows as well, ranging from 0.001 to 0.025 ppm (median 0.014 ppm) for NO₂ and 0.001 to 0.042 ppm (median 0.014 ppm) for NOX. PM₂.5 is measured at a single location (一宮市小信中島字川南１２－３) where values vary between 5.0 and 16.0 µg/m³, the median sitting at 14.0 µg/m³ and the 90th percentile reaching 15.6 µg/m³. SO₂ is captured at two stations (一宮市松降通７－２７－５) with a narrow band from 0.0 to 0.001 ppm, median 0.0005 ppm.

Because the number of rows differs markedly between pollutants – only one row for CO and PM₂.5 versus five rows each for the nitrogen oxides – coverage is uneven, meaning that conditions can differ noticeably across neighborhoods and times not captured here. The dataset’s overall recency is good, but the limited station count and sparse sampling for some gases suggest that the snapshot may not reflect short‑term fluctuations or localized hotspots throughout Ichinomiya.

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 Ichinomiya reflects 23 valid measurements and is Updated within 3 days, with the most recent values recorded at 2026‑02‑10T22:00:00+00:00. This snapshot provides a timely overview of current conditions, but air quality can differ across neighborhoods and change throughout the day, so localized readings may vary from what is displayed here.

OpenAQ station rows