The Solid Waste Land Disposal Datalayer was compiled by the Department of Environmental Protection (MassDEP) to track the locations of land disposal of solid waste. This statewide datalayer contains the majority of facilities currently regulated under MassDEP's solid waste regulations (310 CMR 16.000 and 19.000). Land Disposal refers to an operation established in accordance with a valid site assignment for the disposal of solid waste into or on land (Landfill), or a location for disposal of solid waste from one or more sources which is not established or maintained pursuant to a valid site assignment or permit (Dumping Ground). Polygons in the datalayer include both landfills and dumping grounds. Data are stored in ArcSDE as two layers - SW_LD_POLY (polygons) and SW_LD_PT (point feature class, with one point for each polygon). Please note, only a small fraction of the land disposal sites are active landfills. In addition, this datalayer does not contain all land disposal sites known to MassDEP. The MassDEP Bureau of Waste Site Cleanup and EPA Superfund Program manage former land disposal sites which fall under their regulatory purview. Waste site and mining classifications in the MassGIS Land Use Datalayer and Map Unit Symbols 652 and 652E in the Soils Datalayer may represent land disposal sites not found in the Solid Waste Land Disposal Datalayer.