This dataset makes historical air quality data accessible for various parameters at Calgary monitoring stations. The data is collected by the Calgary Region Airshed Zone and submitted to Alberta Environment and Parks (AEP). The data is delivered to the airdata warehouse, a central repository for Alberta's ambient air quality data via a web service provided by AEP. In this way, AEP provides access to quality controlled historical air quality data at its air quality stations.
In addition to air quality monitoring data, an Air Quality Health Index (AQHI) is calculated hourly at certain monitoring stations. The AQHI is a simple way to interpret air quality conditions: it provides a number from 1 to 10+ which indicates the relative health risk associated with local air quality. The higher the number, the greater the health risk. Further information on the AQHI calculation is available at: https://www.alberta.ca/air-quality-health-index--calculation.aspx

The population, occupied dwelling count, and person per unit calculation of Calgary communities since 1968.

These data are collected from different sources and may be based on community boundaries that do not align perfectly with current boundaries. Data from 1968-1977 and 2016-present reflect community boundaries in those years. Data from 1978-2015 are based on the community boundaries in 2016. Where community boundaries have changed substantially over time, this is captured in the "notes" column. Population and dwelling unit totals do not include "Residual Sub Areas", so they may differ slightly from the totals published in official Civic Census records.

This dataset makes historical air quality data accessible for various parameters at Calgary monitoring stations. The data is collected by the Calgary Regional Airshed and Alberta Environment and Parks groups. The data is collected via a web service provided by the Alberta Environmental Monitoring, Evaluation & Reporting Agency (AEMERA). AEMERA provides access to historical air quality data at its air quality stations.