Query Data Source

Data Source	Update Frequency	Date Last Updated
Comprehensive Environmental Response, Compensation and Liability Information System (CERCLIS)	No longer updated from CERCLIS	January 9, 2003
Superfund Site Information System	As updated within the Superfund Site Information System	Variable
Record of Decision System (RODS)	As updated within the Record of Decision System	Variable
NPL Listing Data	Per site listing event or change in site status	Variable