Air quality in Kingston, Ontario, Canada today

Mr. Duck’s Air Quality Score

Moderate air today for Kingston, 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 Kingston today falls into the Moderate category. The primary pollutant identified is PM2.5 (fine particles). Measurements from five valid monitoring stations show a PM2.5 reference value of 10.0 µg/m³, and no PM10 reference value is available.

Data are shown via OpenAQ and reflect the current conditions based on the latest observations. 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 Kingston includes five measured pollutants – nitrogen monoxide (NO), nitrogen dioxide (NO₂), total nitrogen oxides (NOX), ozone (O₃) and fine particulate matter (PM2.5). All observations come from a single monitoring location, providing ten recent rows of data that were last refreshed on 2026-02-10 22:00 UTC; each pollutant’s most recent reading is therefore within the past three days.

Across the ten entries, NO values range from essentially zero up to 0.002 ppm, with a median of 0.001 ppm and a tenth‑percentile of 0.0002 ppm, indicating that concentrations are consistently low but measurable. NO₂ shows a broader spread, varying between 0.0 ppm and 0.013 ppm; the median sits at 0.0065 ppm while the 90th percentile reaches 0.0117 ppm, suggesting occasional higher readings. NOX follows a similar pattern to its components, ranging from 0.001 ppm to 0.014 ppm, with a median of 0.0075 ppm and a 90th‑percentile value of 0.0127 ppm. Ozone levels are comparatively tight, staying between 0.025 ppm and 0.031 ppm; the median is 0.028 ppm and the distribution is narrow (10th percentile 0.0256 ppm, 90th percentile 0.0304 ppm). PM2.5 concentrations span 4.0 to 10.0 µg/m³, with a median of 7.0 µg/m³; the lower‑decile is 4.6 µg/m³ and the upper‑decile reaches 9.4 µg/m³.

Because all data originate from one site, spatial coverage across Kingston is limited; conditions can differ in other neighborhoods or micro‑environments that are not captured here. Nevertheless, the dataset offers a recent snapshot of air quality, with each pollutant’s latest measurement recorded on the same day and time, providing a consistent baseline for short‑term assessment.

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 data set for Kingston includes five valid measurements and is updated within three days, with the most recent reading recorded on 2026‑02‑10 at 22:00 UTC. This snapshot reflects conditions at specific monitoring points and times; air quality can vary across different neighbourhoods and moments throughout the city.

OpenAQ station rows