Effects of Outdoor Pyrotechnic Displays on the Regional Air Quality of Western Washington State

aerosol monitoring network tracked the pyrotechnic smoke plume for a period of two days as it was advected by low-level winds. The geometric mass mean diameter of the K particles was ~0.7 mm after transport of ~100 km. In the absence of rain, which is the primary sink for particles of this size, the particulate matter generated by the pyrotechnic displays could have an atmospheric residence time of more than one week.