More Monitoring Data | Clean Air Sarnia and Area (CASA)

The CASA website shows real-time air monitoring data from nine monitoring stations in the Sarnia area, including concentrations of air pollutants and wind direction.

Additional monitoring data collected throughout the CASA monitoring network is available below.

Non-Continuous Data
Results of volatile organic compounds (VOC), polycyclic aromatic hydrocarbons (PAH) and total suspended particulate (TSP) and metals measured at several CASA stations on an every 6-day or 12-day basis.
Temporary Air Monitoring Stations
Results from temporary monitoring stations added to the CASA network.
Property Line Monitoring
Results of Property Line Monitoring (PLM) collected by facilities registered to the Petroleum Refining and Petrochemical Industry Standards.

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Air quality data on this website are automatically polled from the Clean Air Sarnia and Area monitoring network and are intended for public awareness. Because the data is real time, they have not undergone complete quality control and quality assurance procedures, and so they may contain errors and are subject to change. The real-time air quality data 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.

Real-time air quality data on this website are not meant for emergency response purposes. This website does not replace or supplement the existing emergency notification and response protocols, including Sarnia-Lambton Alerts.