Number of Potentially Responsible Parties at Superfund Sites Is Difficult to Determine

RCED-96-75: Published: Mar 27, 1996. Publicly Released: Apr 9, 1996.

Additional Materials:


Office of Public Affairs
(202) 512-4800

Pursuant to a congressional request, GAO provided information on the parties responsible for contaminating sites on the Environmental Protection Agency's (EPA) National Priorities List (NPL), focusing on the number of: (1) de minimis parties that may have contributed only a relatively small amount of contamination at nonfederal NPL sites; and (2) potentially responsible parties at nonfederal municipal co-disposal landfill sites.

GAO found that: (1) EPA data collection limitations and reliance on project managers' judgment to identify parties make it difficult to accurately determine the number of de minimis or potentially responsible parties; (2) at least 8,500 to more than 25,000 de minimis parties were associated with 175 nonfederal NPL sites; (3) about 15,000 to more than 40,000 potentially responsible parties were associated with 245 nonfederal municipal co-disposal landfill sites; and (4) the estimates may be understated because of the data limitations and because they do not include sites that may be added to NPL.

Jan 4, 2018

Dec 22, 2017

Dec 13, 2017

Nov 15, 2017

Nov 2, 2017

Oct 30, 2017

Oct 24, 2017

Oct 23, 2017

Oct 18, 2017

Oct 16, 2017

Looking for more? Browse all our products here