Superfund: A Superfund site is any land in the United States that has been contaminated by hazardous waste and identified by the Environmental Protection Agency (EPA) as a candidate for cleanup because it poses a risk to human health and/or the environment.
NPL Superfund: The National Priorities List is a list of the most hazardous waste sites that have been identified by Superfund/ CERCLIS where long-term remedial response actions can only be conducted.
Superfunds can be sub-classified as:
Active: A non-archived Superfund site at which site assessment, removal, remedial, enforcement, cost recovery, or oversight activities are being planned or conducted under the Superfund/CERCLIS program.
Archived: A Superfund site that has no further interest under the Federal Superfund Program based on available information and is no longer part of the CERCLIS inventory.