Superfund; EPA Should Improve the Reliability of Data on National Priorities List Sites Affecting Indian Tribes

The Environmental Protection Agency (EPA) does not have reliable data identifying National Priorities List (NPL) sites that are located on tribal property or that affect tribes. Specifically, EPA collects data on whether sites are on tribal property or have Native American Interest (a data variable indicating sites where tribal members or tribal land would be directly affected by the release of hazardous substances), as well as which tribes are associated with NPL sites. However, EPA’s data are not always accurate or complete for a number of reasons.