Air quality in Saint-Lazare, Quebec, Canada today
Mr. Duck’s Air Quality Score
Good air today for Saint-Lazare, Quebec, Canada
This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.
Air quality today
The air quality in Saint‑Lazare today is classified as Good. The primary pollutant measured is PM2.5, with a reported concentration of 6.445 µg/m³ based on five valid observations from OpenAQ data.
Overall conditions meet the Good category criteria, and no additional pollutants are highlighted 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 Saint‑Lazare air‑quality record consists of five data rows collected from a single monitoring site, each representing one of the measured variables. All five pollutants—PM1, PM2.5, relative humidity, temperature and UM003 (particle count)—are available for this city. The most recent reading for every parameter was taken on 2026‑02‑10 at 22:00 UTC, which falls within the “updated within three days” freshness window, so the dataset reflects very current conditions.
Because there is only one station contributing data, each pollutant shows a single value rather than a range. For PM1 the concentration is 1.2888333305716513 µg/m³; for PM2.5 it is 6.445000012715657 µg/m³; relative humidity registers at 49.83633346557617 %; temperature is measured at 0.39800000190734863 °C; and the UM003 particle count stands at 297.43933486938477 particles/cm³. The minimum, median and maximum for each metric are identical, indicating that no variability can be assessed from this snapshot alone.
With only one monitoring location, spatial coverage across Saint‑Lazare is limited, meaning conditions may differ in other neighbourhoods or at other times of day. Nevertheless, the data set is fully up‑to‑date, and every pollutant listed above has a recent measurement, providing a clear but narrow picture of the city’s air quality at that specific moment.
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 Saint‑Lazare reflects five valid measurements and was refreshed recently, having been updated within three days (last update: 2026‑02‑10 22:00 UTC). This snapshot provides a current view of ambient conditions, but air quality can differ across neighborhoods and change throughout the day, so values may not represent every location or moment in the city.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| St-Lazare | pm1 | 1.2888333305716513 | µg/m³ | 2026-02-10 22:00 UTC |
| St-Lazare | pm25 | 6.445000012715657 | µg/m³ | 2026-02-10 22:00 UTC |
| St-Lazare | relativehumidity | 49.83633346557617 | % | 2026-02-10 22:00 UTC |
| St-Lazare | temperature | 0.39800000190734863 | c | 2026-02-10 22:00 UTC |
| St-Lazare | um003 | 297.43933486938477 | particles/cm³ | 2026-02-10 22:00 UTC |