Impact of cruise ship emissions in Victoria, BC, Canada

► Local air quality impacts of cruise ship emissions. ► Comparison of NO2, SO2 and PM2.5 when ships are present/absent. ► Multi-year measurements and CALPUFF modeling scenario. ► World Health Organization 24-hour SO2 guideline exceeded 16% of 24-hour periods. ► MARPOL Annex VI treaty will reduce sulphur fuel content and lower SO2 levels.