In 2012 the CCME started the Air Quality Management System process. This provided for evaluation of PM and ozone measurements at many sites in BC and across Canada. In 2015 the first air zone reports for BC were published. They show that Crofton, Smithers and Vanderhoof are not meeting the PM2.5 standard. This is a trigger for corrective intervention. The exact type of intervention is not yet determined, partly because it's a new process and partly because of variable site-specific factors. It's not likely that one size fits all in correction.