Exhibit 99.1

        PERMA-FIX ENVIRONMENTAL SERVICES, INC. ANNOUNCES RELEASE OF FIRST
          QUARTER EARNINGS AND INVITES YOU TO JOIN ITS CONFERENCE CALL

ATLANTA, May 3 /PRNewswire-FirstCall/ -- Perma-Fix Environmental Services, Inc.
(Nasdaq: PESI; Boston) (Germany: PES.BE) today announced that it will release
first quarter earnings the morning of Monday, May 9, 2005. In conjunction with
the Company's first quarter earnings release, you are invited to listen to its
conference call that will be broadcast live over the Internet, or to participate
directly in the conference call at the numbers noted below. The conference call
will be held on Monday, May 9, 2005, at 12:00 p.m. EDT with Dr. Louis F.
Centofanti, Chairman and CEO, and Richard T. Kelecy, Vice President and CFO, of
Perma-Fix Environmental Services, Inc.

    What:  Perma-Fix Presents First Quarter 2005 Operating Results

    When:  Monday, May 9, 2005, at 12:00 p.m. EDT

    Where: http://www.perma-fix.com

    How:   Live over the Internet -- Simply log on to the web at the address
           above

    Contact:  Richard T. Kelecy, 352-395-1351

            TO PARTICIPATE IN THE CONFERENCE CALL, PLEASE DIAL-IN:

                          U.S. Calls 1-877-888-7019

                       International Calls 416-695-5259

Perma-Fix Environmental Services, Inc. is a national environmental services
company, providing unique mixed waste and industrial waste management services.
The Nuclear Segment provides radioactive and mixed waste treatment services to
hospitals, research laboratories and institutions, numerous federal agencies
including the Departments of Energy and Defense and nuclear utilities. The
Industrial Segment provides hazardous and non-hazardous waste treatment services
for a diverse group of customers including Fortune 500 companies, numerous
federal, state and local agencies, and thousands of smaller clients. The company
operates 11 major waste treatment facilities across the country.

     Please visit us on the World Wide Web at http://www.perma-fix.com .

SOURCE  Perma-Fix Environmental Services, Inc.
    -0-                             05/03/2005
    /CONTACT:  Dr. Louis F. Centofanti, Chairman and CEO, Perma-Fix
Environmental Services, Inc., +1-404-847-9990; or Investors, David Waldman,
dwaldman@lhai.com, or John Heilshorn, both of Lippert/Heilshorn & Associates,
+1-212-838-3777; or European investor relations, Herbert Strauss,
+011-43-316-296-316, or herbert@eu-ir.com, all for Perma-Fix Environmental
Services, Inc./
    /Web site:  http://www.perma-fix.com /