This line chart illustrates the daily average Particulate Matter (PM) 2.5 concentrations detected by RESPIRAR air monitors in Salisbury and College Park throughout June 2023. The chart compares the 24-hour averages with the Environmental Protection Agency's (EPA) 24-hour standard of 35 μg/m3. The spikes on June 7-8 and June 29-30 correspond with wildfire smoke episodes, reaching a high of 103 μg/m3 in Salisbury on June 7th in Salisbury and 51 μg/m3 on June 30th. These events underscore how wildfire smoke episodes can negatively affect indoor air quality.