Thunder Bay: Hourly Fine Particulate Matter PM2.5 Concentrations
From November 29, 2023 EST to December 1, 2023 EST.
Notes:
- Effective January 1, 2013, the PM2.5 monitoring method was changed in Ontario. For more information, visit Frequently Asked Questions.
- The pollutant concentrations on this web page are based on automatically polled data and have not undergone final verification.
