Air Quality Historical Data Platform
This dataset falls under the category Environmental Data Air Quality Data.
It contains the following data: Historical data of air quality : PM2.5, PM10, O3, NO2, SO2, CO
This dataset was scouted on 2022-02-05 as part of a data sourcing project conducted by TUMI. License information might be outdated: Check original source for current licensing. The data can be accessed using the following URL / API Endpoint: https://aqicn.org/city/mumbai/See URL for data access and license information.

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 daily AQI values, updated every hour, approximately 50 minutes after the hour. For example, the 13:00 data is available around 13:50, for all three resources. ***Note**: The AQI systems don't change the time: they always use Eastern Standard Time (EST) and not Eastern Daylight Time (EDT). Thus, in the example above, around 13:50 EDT, the most recent data available will be from 12:00 EDT.* Historical values, updated daily, are available here. The station list and sectors linked to RSQA data are also available.

The Air Quality Health Index (AQHI) is a scale designed to help quantify the quality of the air in a certain region on a scale from 1 to 10. When the amount of air pollution is very high, the number is reported as 10+. It also includes a category that describes the health risk associated with the index reading (e.g. Low, Moderate, High, or Very High Health Risk). The AQHI is calculated based on the relative risks of a combination of common air pollutants that are known to harm human health, including ground-level ozone, particulate matter, and nitrogen dioxide. The AQHI formulation captures only the short term or acute health risk (exposure of hour or days at a maximum). The formulation of the AQHI may change over time to reflect new understanding associated with air pollution health effects. The AQHI is calculated from data observed in real time, without being verified (quality control).

The air monitoring stations measure up to 6 common pollutants like:

• ground-level ozone
• fine particulate matter
• nitrogen dioxide
• carbon monoxide
• sulphur dioxide
• total reduced sulphur compounds

The Ministry of the Environment, Conservation and Parks continually monitors air quality across Ontario. We use this information to:

• inform the public about outdoor ambient air quality through the Air Quality Index (AQI) and Smog Advisory program
• assess Ontario's air quality and evaluate long-term trends
• identify areas where pollutant levels are exceeded
• identify the origins of pollutants
• develop air policy
• provide quantitative measurements to reduce specific pollution sources
• determine the significance of pollutants from long-range transports and their effects
• provide air quality researchers with data to link environmental and human health effects to air quality