Air quality in Kitchener, Ontario, Canada today

Mr. Duck’s Air Quality Score

Moderate air today for Kitchener, 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 Kitchener today is classified as Moderate. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 concentration of 27.0 µg/m³, based on five valid observations reported through OpenAQ.

This assessment reflects the current conditions without additional interpretation. 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 Kitchener air‑quality feed pulls data from a single monitoring station that contributed 14 rows of observations across eight measured pollutants: NO, NO₂, NOX, O₃, PM1, PM2.5, PM10 and relative humidity. The most recent timestamps are clustered in early February 2026 for the gases and fine particulate matter, with NO₂, O₃, NO, NOX and PM2.5 all last updated on 2026‑02‑10 22:00 UTC, indicating fresh coverage within the past three days. In contrast, the coarser particles and humidity come from older records – PM1 and relative humidity were last reported on 2025‑06‑18 03:00 UTC, while PM10 dates back to 2025‑01‑13 23:00 UTC, so those metrics reflect conditions from several months ago.

Across the recent data set, PM2.5 values ranged from about 14.9 µg/m³ up to a maximum of 27 µg/m³, with a median of 26 µg/m³, showing that most measurements sit near the upper end of that span. NO₂ varied between 0.002 ppm and 0.009 ppm (median 0.0055 ppm), and O₃ was recorded from 0.037 ppm to 0.043 ppm (median 0.04 ppm). The nitrogen oxides measured at the station were remarkably stable: NO held a constant 0.001 ppm, while NOX remained fixed at 0.01 ppm for all recent rows.

Because only one sensor contributes data, the spatial representation is limited to its location, and the older timestamps for PM1, PM10 and humidity mean those particular aspects of air quality may not reflect current conditions. Users should keep in mind that Kitchener’s environment can change across neighborhoods and over time, and the available dataset captures a snapshot rather than a comprehensive city‑wide picture.

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 Kitchener includes five valid measurements and was updated within 3 days, with the latest refresh recorded at 2026‑02‑10T22:00:00+00:00. This snapshot reflects conditions captured by those sensors at that time; air quality can vary across different neighbourhoods and throughout the day, so values may not represent every location or moment in the city.

OpenAQ station rows