Air quality in Laval (administrative region), Quebec, Canada today

Mr. Duck’s Air Quality Score

Good air today for Laval (administrative region), Quebec, 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 Laval today is classified as Good. The primary pollutant measured is PM2.5 (fine particles). The latest reading shows a PM2.5 concentration of 1.91 µg/m³. Nine valid measurements contributed to this assessment.

Data is shown via OpenAQ. The reported PM2.5 value of 1.91 µg/m³ aligns with the Good category criteria. No additional pollutants were identified as dominant in the current set of nine measurements. The assessment reflects the conditions captured at the time of sampling. The dataset includes nine individual sensor readings taken throughout the monitoring period. All values are presented in micrograms per cubic meter. 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 Laval includes five measured variables: PM1, PM2.5, relative humidity, temperature and the particle count UM003. All values come from two monitoring stations, each contributing ten recent rows that fall within the last thirty days, and none are older or unknown. The most recent update for every pollutant was recorded on 2026-02-10 22:00 UTC, so the information reflects the current conditions at the time of collection.

PM1 concentrations range from a low of 0.136 µg/m³ to a high of 24.700 µg/m³, with a median of 12.418 µg/m³, while PM2.5 spans 1.909 µg/m³ up to 41.761 µg/m³ and sits at a median of 21.835 µg/m³. The relative humidity values are tightly clustered, varying between 35.86 % and 42.52 % with a median of 39.19 %. Temperature shows a broader swing, from –4.126 °C to 1.884 °C and a median of –1.121 °C, indicating modest seasonal variation during the reporting period. The UM003 particle count, expressed in particles per cubic centimetre, moves from 216.63 up to 945.21, with a median of 580.92, illustrating a considerable spread in airborne particle density.

Because all five pollutants are reported from the same timestamp and the same primary site – Aréna Hartland‑Monahan – the spatial coverage is limited to the immediate vicinity of those stations. Nevertheless, the data set is fully up‑to‑date, with no outdated rows, and the range of values provides a snapshot of the variability that can occur across different atmospheric components in Laval.

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

These data are based on nine valid measurements and were updated within 30 days, with the most recent record timestamped 2026-02-10T22:00:00+00:00. The values represent a snapshot of ambient conditions across Laval, Quebec, and may not reflect short‑term fluctuations or micro‑scale differences. Air quality can vary by location and time within the city, so individual experiences may differ from the reported averages.

OpenAQ station rows