A novel 1-hr guideline value for PM10 and PM2.5 exposure during episodic air pollution events

Impact: Health and welfare

Description of impact

For episodic air pollution incidents, there is a need for short duration air pollution standards. Open uncontrolled fires release significant air pollutants over a short duration. Particulates (PM10 and PM2.5) routinely only have 24-hr averaging periods for exposure standards which is of no use in episodic events. This work delivers a probability analysis to indicate how likely a 1-hr mass concentration will result in an exceedance of a 24-hr standard. This is based on a statistical analysis of existing large fire monitoring data.
Category of impactHealth and welfare