Wastewater treatment plants and landfills emit volatile methyl siloxanes (VMSs) to the atmosphere: Investigations using a new passive air sampler

► A new passive air sampler is calibrated for volatile methyl siloxanes (VMSs). ► The SIP disk sampler is used to map VMS levels around WWTPs and landfills. ► The waste sector is shown to be a key emission source of VMSs to air. ► This is the first study to quantify this emission pathway.