This line chart displays hourly Air Quality Index Values (AQI) averages for Sailsbury and College Park. When the AQI values are segmented into hourly averages, Salisbury air quality index scores reach unhealthy levels on occasions outside of the wildfire smoke incidents. On June 14th, particulate matter levels reached a high of 234 μg/m3 around 3:00 a.m., approaching very unhealthy air quality index levels.