The spring of 2026 is leading to hazardous air quality across the United States, as record levels of pollen combine with heightened ozone and particulate matter, resulting in increased visits to emergency rooms for respiratory and heart-related issues. Twelve significant cities in the US are experiencing air quality measurements that exceed safe limits, with fine particulate matter — the most harmful air pollutant — reaching alarming concentrations. Health professionals are advising children, seniors, and individuals with respiratory issues to minimize their time outdoors.
