As its name suggests, the Westchester County Department of Environmental Facilities oversees the operations of various facilities that deal with the environment. These include the:

The department is responsible for all recycling efforts of the county, including the Household Material Recovery Facility (H-MRF) collection days.

The commissioner of the department is Thomas Lauro, P.E.

Annual reports
The following annual reports cover all wastewater, water and solid waste operations.