RSQA: Montreal Historical Air Quality Index Data

Historical Air Quality Index (AQI) values measured by the City of Montreal, updated daily. The dataset provides hourly daily values and includes links to station and sector information. It is published by the Government and Municipalities of Québec under a CC-BY-4.0 license.

Use Cases

• Analyze historical air pollution trends in Montreal based on the hourly AQI values.
• Model the relationship between AQI and geographic sectors based on the linked sector data.
• Validate or calibrate air quality models using the station-specific measurements mentioned in the description.

Strengths

• Data is updated daily, providing current hourly values.
• Includes links to station and geographic sector metadata for spatial context.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• The description notes a one-hour time lag during daylight savings time due to the use of EST.

Provenance

Source

Government and Municipalities of Québec

Collection Method

Measured by the City of Montreal.

Freshness

Last updated 2026-04-17 15:48:32.821066; freshness should be verified.

Geography

Montreal, Québec