PM stands for particulate matter (also called particle pollution): the term for a mixture of solid particles and liquid droplets found in the air. Some particles, such as dust, dirt, soot, or smoke, ...

EPA hosted a series of virtual engagement sessions in April and May 2026 to receive input from interested parties regarding management of surface soils containing low concentrations of per- and ...

One-day training, with two dates to choose from. This training focuses on teaching the principles of erosion and sediment control and how to best apply these principles to existing site conditions.