Air quality in Belleville, Ontario, Canada today

Mr. Duck’s Air Quality Score

Good air today for Belleville, Ontario, Canada

⚠️ 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 Belleville today is classified as Good. The primary pollutant identified is PM2.5 (fine particles).

Measurements from five valid monitoring stations show a PM2.5 concentration of 9.0 µg/m³. No PM10 value is available for this assessment. 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 Belleville air‑quality feed currently includes five measured pollutants – nitrogen monoxide (NO), nitrogen dioxide (NO₂), total nitrogen oxides (NOX), ozone (O₃) and fine particulate matter (PM₂.5). All data come from a single monitoring station that contributed eight separate rows of observations, each refreshed on 2026‑02‑10 at 22:00 UTC, which meets the “updated within three days” criterion.

Across the recent snapshot, NO₂ values span from a low of 0.002 ppm to a high of 0.011 ppm, with a median of 0.0065 ppm and the 10th‑percentile at roughly 0.0029 ppm. Ozone shows a tighter band, ranging between 0.030 ppm and 0.032 ppm; its median sits at 0.031 ppm and the inter‑decile spread is only about 0.0016 ppm. PM₂.5 concentrations are recorded in micrograms per cubic metre, varying from 9.0 µg/m³ up to 13.0 µg/m³, with a median of 11.0 µg/m³ and the 10th‑percentile at 9.4 µg/m³. The nitrogen monoxide reading is constant at 0.001 ppm, while NOX is also fixed at 0.013 ppm for this period.

Because all eight rows are recent and originate from a single site, the dataset offers a snapshot that is temporally fresh but spatially limited; conditions elsewhere in Belleville may differ from what these point measurements capture. The pollutant coverage is uneven: NO and NOX each have only one recorded value, whereas NO₂, O₃ and PM₂.5 provide a modest range of observations, allowing a glimpse of variability for those species. Overall, the data are up‑to‑date but represent a narrow geographic footprint 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 current dataset for Belleville includes five valid measurements and was refreshed Updated within 3 days, with the latest values recorded on 2026‑02‑10T22:00:00+00:00. These figures represent a snapshot of conditions at specific monitoring points; air quality can differ across neighbourhoods and change throughout the day, so local variations may not be captured in this summary.

OpenAQ station rows