Description
The City of Montreal measures air quality in the form of a numerical value called the “Air Quality Index (AQI).” This data set provides access to historical AQI values, updated daily.
***Note: ** The AQI systems do not change the time: they always use Eastern Standard Time (EST) and not Eastern Daylight Time (EDT). So during daylight savings time, there is a 1-hour time lag in the data. For example, a measurement recorded at 12 pm EST is that of 1 pm EDT. *
The daily values, updated every hour, are available [here] (rsqa-air-quality-index).
The [list of stations] (rsqa-liste-des-stations) and [sectors] (rsqa-geographic-sectors) linked to RSQA data is also available.
Resources
| Name | Format | Description | Link |
|---|---|---|---|
| Detailed AQI by station (2013 to 2015) | CSV | Open resource | |
| AQI per station (2013 to 2015) | CSV | Open resource | |
| Detailed AQI by station (2022 to 2024) | CSV | Open resource | |
| AQI by sector (Historical) | CSV | Open resource | |
| AQI by sector (2010 to 2012) | CSV | Open resource | |
| AQI by sector (2019 to 2021) | CSV | Open resource | |
| AQI per station (2022 to 2024) | CSV | Open resource | |
| Detailed AQI by station (2025) | CSV | Open resource | |
| Detailed AQI by station (2010 to 2012) | CSV | Open resource | |
| Detailed AQI by station (Historical) | CSV | Open resource | |
| Detailed AQI by station (2016 to 2018) | CSV | Open resource | |
| AQI by sector (2022 to 2024) | CSV | Open resource | |
| AQI by sector (2025 to 2027) | CSV | Open resource | |
| AQI per station (2010 to 2012) | CSV | Open resource | |
| AQI per station (Historical) | CSV | Open resource | |
| Detailed AQI by station (2007 to 2009) | CSV | Open resource | |
| AQI per station (2007 to 2009) | CSV | Open resource | |
| AQI by sector (2007 to 2009) | CSV | Open resource | |
| AQI by sector (2016 to 2018) | CSV | Open resource | |
| AQI per station (2016 to 2018) | CSV | Open resource | |
| AQI per station (2019 to 2021) | CSV | Open resource | |
| Detailed AQI by station (2019 to 2021) | CSV | Open resource | |
| AQI by sector (2013 to 2015) | CSV | Open resource | |
| AQI per station (2025 to 2027) | CSV | Open resource | |
| Original metadata (https://www.donneesquebec.ca) | HTML | Open resource |