AQI readings on this web page are based on automatically polled data and have not undergone final verification

The AQI readings on this web page are calculated from data that are automatically polled from Ontario’s Ambient Air Monitoring Network and are intended for public awareness. The data have not undergone complete quality control and quality assurance procedures and may result in incorrect AQI readings. The AQI readings on this web page are considered “unverified data” and should not be used in published documents.

Data integrity and validity may be affected by instrument malfunctions, telemetry connectivity, QA/QC requirements, instrument calibration times or power outages.