Canadian wildfire smoke is once again affecting communities far beyond the areas where the fires are burning. For homeowners in Hagerstown and Washington County, Maryland, the smoke is also raising important questions about wildfire smoke and indoor air quality. On July 17, 2026, the Maryland Department of the Environment issued a Code Purple Air Quality Alert for the Hagerstown area. Code Purple means air pollution has reached levels considered very unhealthy for the general population, with a greater risk of health effects for everyone. Although staying indoors can reduce your…