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Due to a lapse in appropriations, EPA websites will not be regularly updated. In the event of an environmental emergency imminently threatening the safety of human life or where necessary to protect certain property, the EPA website will be updated with appropriate information. Please note that all information on the EPA website may not be up to date, and transactions and inquiries submitted to the EPA website may not be processed or responded to until appropriations are enacted.

We've made some changes to EPA.gov. If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.

Contact Us about Locating and Selecting Scenarios Online (LASSO)

Report an environmental violation

Report possible violations of environmental laws and regulations.

Mailing Address:

Environmental Protection Agency
National Center for Environmental Assessment
c/o Exposure Analysis & Risk Characterization Group - LASSO Program
Mail Code: 8623R
1200 Pennsylvania Ave, N.W.
Washington, DC  20460

Contact: EPA's contact for EPA's LASSO Program is Phil Morefield who may be reached at (202) 564-7549 or email morefield.philip@epa.gov (morefield.philip@epa.gov). For technical issues, use the fill-in form below.

Please use the form below to send us comments or questions. Be sure to include your e-mail address if you’d like a response.