To date, there is a gap in the research regarding the use of CO2 monitors to assess air quality on public transit in Canada. Most existing studies were large-scale, with monitors mounted in the transit vehicles to assess air quality, rather than being used by individuals for personal risk assessment. This case study aims to address this gap, by evaluating the individual use of CO2 monitors for assessing air quality on a transit authority in a Northern Ontario city, including through cold winter months. The results of this assessment will provide insights into the current state of infection risk on public transit in a Northern Ontario city, while also generating information on tools and factors that workers can use to perform their own assessments to determine infection risk on their commutes using public transit.

The purpose of this project is to determine the factors that impact air quality on public transit as measured by a CO2 monitor. Determine the reliability of a more cost-effective Vitalight CO2 monitor, against the Aranet4 CO2 monitor. Recommendations for personal monitoring.