U.S. Air Quality

Moderate PM2.5 Levels in Baltimore

Warm and humid weather conditions were experienced in Baltimore. The boundary layer rose from 0.8 to 1.5 km during today's observations with an occasional cloud advecting over ELF (red counts over 1.5 km). PM2.5 concentrations at Maryland Department of the Environment Oldtown monitoring station ranged between 18-32 ug/m3 (Moderate AQI Levels: 56-83). Calipso overpassed 73 km west of UMBC at 18:28 UTC.